d-series™ cabling standards

Reference

D-Series™ Cabling Standards 27-March-2014

Revision: Release

D-Series™ Cabling Standards Reference

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D-Series™ Cabling Standards

Reference Contents

Contents

About this Manual ................................................................................................. 6

Audience ................................................................................................................................................... 6

Hardware Documentation Sets ................................................................................................................ 6

What is in this Document ......................................................................................................................... 6

Recommended Cable Types ................................................................................... 7

About Cabling ........................................................................................................................................... 7

Video Connections ............................................................................................................................... 7

RS-422 Serial Connections .................................................................................................................... 8

Network Connections ........................................................................................................................... 8

Time Code Connections........................................................................................................................ 8

GPI Connections ................................................................................................................................... 8

D-Series v4 Cabling ................................................................................................ 9

About D-Series v4 Cabling ........................................................................................................................ 9

Standard Wiring for Serial 16 Cards ......................................................................................................... 9

SER16 A-Type Adapter ....................................................................................................................... 10

SER16 B-Type Adapter ........................................................................................................................ 11

SER16 C-Type Adapter ........................................................................................................................ 12

SER16 H-Type Adapter ....................................................................................................................... 13

Serial-16 Serial Cables ............................................................................................................................. 14

Transfer Card and NEXIO Server ........................................................................................................ 15

Transfer Card and OMNEON Server ................................................................................................... 15

Workstation USB to DB9 (RS422) Adapter ............................................................................................. 15

The VCP Driver.................................................................................................................................... 16

Configuring the VCP Driver to use a Specific COM Port ..................................................................... 16

To Obtain Location IDs ....................................................................................................................... 18



Reference Contents

FTDI Virtual Com Port registry modification ...................................................................................... 19

D-Series v3 Cabling .............................................................................................. 20

About D-Series v3 Cabling ...................................................................................................................... 20

DAL Standard 2 Pair Cables..................................................................................................................... 20

Type AB............................................................................................................................................... 20

Type AC ............................................................................................................................................... 20

Type AG .............................................................................................................................................. 21

Type AH .............................................................................................................................................. 21

Type AJ (Amplicon RS422/232 Converter) ......................................................................................... 22

Type AK ............................................................................................................................................... 22

Type AL ............................................................................................................................................... 22

Type AM ............................................................................................................................................. 23

Type CC ............................................................................................................................................... 23

DAL Standard 1 Pair Cables..................................................................................................................... 24

Type DD .............................................................................................................................................. 24

Type DF ............................................................................................................................................... 24

Type ED ............................................................................................................................................... 24

Type FF ............................................................................................................................................... 25

Power Supply Cable Standards ............................................................................................................... 25

Type PD and Type PP (Cable Type Belden 8465) ................................................................................ 25

Type PD and Type PP (YY 5-Core o.75mm2 Control Cable) ................................................................ 27

Type A-Special Cabling (B&B RS422/232 Converter) .............................................................................. 28

Partyline Panel Cabling Standards .......................................................................................................... 28

Partyline Panel with Under Monitor Displays (UMDs) ....................................................................... 28

Partyline Panel with VTR Next Event Panels (NEPs) ........................................................................... 29

Serial-4 Card Cabling ............................................................................................................................... 29

Cable Assembly .................................................................................................................................. 30

Serial-8 Card Cabling ............................................................................................................................... 31

Serial-8 Card Split Assembly for use with DALstation ........................................................................ 31

Serial-8 Card Straight-Through DB25 Cable ....................................................................................... 31

CAT 5 Ethernet Cables (Standard and Crossover) .................................................................................. 32



Reference Contents

Appendix .............................................................................................................. 34

RS-422/RS-485 ........................................................................................................................................ 34

Specifications ..................................................................................................................................... 34



Reference About this Manual

About this Manual

Audience This manual is intended as a general reference and for use by engineers or technicians when installing professional automation computers.

Hardware Documentation Sets The following D-Series™ v4 playout automation hardware documentation is referenced together:

H-Class D-Series Device Controller Hardware Reference

D-Series Cabling Standards Reference

D-Series Device Controller Board Set Reference

D-Series 6800 Panel Reference

D-Series Hardware Control Panels Reference

What is in this Document This document outlines standard cabling used for D-Series v3 and v4 components and new Device Controller hardware components.



Reference Recommended Cable Types

Recommended Cable Types

About Cabling Every effort is made to ensure your installation goes smoothly and your system operates as per specification. Non-conforming cables have been found to present many installation challenges to our installers. Therefore, we recommend the following cable types OR STANDARD EQUIVALENTS be used in a customer installation.

Cables recommended are suitable for non-plenum rated environments only.

Classification Cable Type Location Cable Type

Video Cables Analog Video Cable Inter-rack Belden 8281

Analog Video Cable Intra-rack Belden 8279

Digital Video Cable Inter-rack Belden 1694A

Digital Video Cable Intra-rack Belden 1505A

Audio Cables Single pair, line level Belden 9451

Microphone level Canare L-4E6S

110 ohm Digital Audio Belden 1800A

75 ohm Digital Audio Belden 1505A

Data Cables RS-422 Control Cables (For ADC) Belden 1227A1 or 9805

(For D-Series) Belden 8723

Tally/GPI Control Cables

Belden 9451

Time Code Cables Belden 9451

Computer Network Cables

Category 5 Any Category 5 cable.

Video Connections Normally terminated at both ends by a BNC connector. Crimp-on connectors are recommended over solder or twist-on types.



Reference Recommended Cable Types

RS-422 Serial Connections A high-quality, crimp-on connector is recommended for all modular connections. Note that although the RS-422 connections require only four connections when the grounds are excluded, a six position (RJ-14) connector must be used. Care should be taken to utilize the correct type for the cabling installed; different types are utilized for solid and stranded conductors, as well as flat vs. round jackets. The same type of cabling should be used to connect the automation computer to the relay panels, and the relay panels to the devices, with appropriate connectors as needed. For D9 connectors, shells with separate pins are typically preferable.

NOTE: A 100 ohm cable is recommended for all RS-422 connections.

Network Connections A high-quality, crimp-on connector is recommended for all modular connections. Network connections utilize an eight pin (RJ-45) connector, although only four pins may be connected. It is important that the transmit line pair and the receive line pair each utilize a twisted pair of conductors within the cable. Care should be taken to utilize the correct type of connector for the cabling installed; different types are utilized for solid and stranded conductors, as well as flat vs. round jackets.

Time Code Connections The time code connection is made via a mini XLR connector. Although quite durable once installed, this connector is easily damaged during installation and care should be taken.

GPI Connections A standard 5mm removable terminal block / header assembly is used for each GPI input and output.

Each conductor is secured by a screw clamp and all wiring may be done prior to installing the terminal block.

Using a “left hand” terminal block will result in the wiring exiting downwards.

Using a “right-hand” terminal block will result in an upwards exit.

Vertical connectors are supplied.



Reference D-Series v4 Cabling

D-Series v4 Cabling

About D-Series v4 Cabling D-Series V4 systems support the new hardware chassis and newer components (e.g. the 6800 + panel w/ Serial Transfer Cards, MUX cards, and GPI cards). To accommodate cabling to newer hardware components D-Series v4 playout automation systems use the following cabling:

Standard Wiring for Serial 16 Cards

Serial-16 Serial Cables for the Transfer Card

Workstation USB to DB9 (RS422) Adapter

Standard Wiring for Serial 16 Cards D-Series V4 systems can use new system hardware. The new SER-16 cards have RJ45 connectors. In addition, older MUX-800 and CON-8 cards are replaced with the 6800+ frame with RJ45 connectors.

The following subsections provide this standard cabling information for both of the new Serial 16-Port Serial cards.

About Serial-16 Adapters New SER-16 Interface panels have RJ45 connectors. In addition, older MUX-800 and CON-8 cards are replaced with a SMS6800+ panel (incl. Serial Transfer cards, MUX cards, and GPI cards) with RJ45 connectors.

The change from D9 plugs to RJ45 connectors required designing new adapters.

Note: Wire colors may change.

SER16 A-Type and SER16 B-Type adapters

SER 16 A-Type and SER16 B-Type adapters are only used with legacy systems. These adapters are not the same as used with SER 12 hardware.

SER 16 C-Type and SER16 H-Type adapters

SER16 C-Type and SER16 H-Type adapters are used with new systems.




SER16 A-Type Adapter

DEVICE Device Controller




SER16 B-Type Adapter

Device Controller DEVICE




SER16 C-Type Adapter





SER16 H-Type Adapter





Serial-16 Serial Cables A standard straight-through CAT5 Cable connects a SER-16 card via the Interface Panel to a 6800 panel Serial Transfer Card or MUX card, then through an adapter to control a device.

Serial Cabling Detail Serial 16 via IF Panel

87

65

43

21TX+

TX-

RX+

RX-

87

65

43

21

12345678

8 7 6 5 4 3 2 1

TX+

TX-

RX

+

RX

-8 7 6 5 4 3 2 1

RX

+

RX

-

TX+

TX-

RX+

RX-

TX+

TX-

87

65

43

21

8 7 6 5 4 3 2 1

CAT 5 Cable

12

34

56

78CAT 5 Cable

Controlled DeviceAdapter

STS6800Or

MUX6800




Transfer Card and NEXIO Server This modified CAT5 cable connects an SMS Transfer Card and a NEXIO Server.

Transfer Card and OMNEON Server This modified CAT5 cable connects an SMS Transfer Card and a NEXIO Server.

Workstation USB to DB9 (RS422) Adapter Newer automation workstations are specified with USB ports only. To facilitate connection with broadcast devices and expansion panels, a custom USB to RS422 DB9 converter cable is provided. The DB9 connector at the control panel end is a type “B” and plugs directly into the unit.




USB Plug Converter Chip

1

2

3

4

5

6

7

8

9RX-TX-

TX+RX+

DB9 Connector

RX+RX-TX-TX+

The VCP Driver A VCP driver is required to use this cable.

When this cable is used at a site, all VCP drivers necessary to use this cable are installed and configured by certified automation engineers.

IMPORTANT: If the USB cable is unplugged, plug it back into the SAME USB port it was originally plugged into.

VCP Driver location: The USB adapter cable contains an FTDI FT232R USB to Serial converter chip, so the FTDI Virtual Com Port driver should be installed. The driver and installation instructions are available on http://www.ftdichip.com/Drivers/VCP.htm .

Configuring the VCP Driver to use a Specific COM Port A VCP driver is required to use this cable.

When this cable is used at a site, all VCP drivers necessary to use this cable are installed and configured by certified automation engineers.

Why the Configuration?

Typically USB cables appear to the system as unique devices. Each device is identified by its serial number and the serial number is used by the VCP driver when it creates a COM port.

This means when the USB-to-DB9 cable is:

Plugged in:

• The system allocates a new COM port for the cable. • The DALStation.ini file would be modified to reflect that port

Unplugged and Replugged in:

• The COM port number changes. • The DALStation.ini file would need to be modified to reflect the change. This would

repeat – chasing the serial connection up to COM9 – every time the cable is unplugged and plugged back in.


http://www.ftdichip.com/Drivers/VCP.htm



Solution

This can be avoided by configuring the system to allow a USB to appear on the same COM port regardless the number of times it is plugged and unplugged. FTDIBUS can use Location IDs (rather than serial numbers) to define the set of supported USB ports. The configuration parameter LocIds is used to specify an array of device locations in the USB tree.

If LocIds is set up and a device is plugged into:

One of the supported locations, then it is installed as a COM port.

Some other location, then it is NOT installed as a COM port.

To configure VCP Driver The driver's default behavior is that all USB ports are supported, but the default can be overridden via the binary value LocIds in the FTDIBUS service key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\FTDIBUS\Parameters\LocIds

Use the following procedure to configure the VCP driver so that the USB-to-DB9 cable always appears on the same COM port regardless the number of times it is plugged and unplugged.

Location IDs are used to define the set of USB ports supported by FTDIBUS

Requirements

The ability to configure LocIds requires:

VCP 1.00.2150 or later

USBView with Location IDs

Windows 2000 or Windows XP

Warning: The use of LocIds can control the number of COM ports created in the system, but cannot prevent the installation of a new USB device for every unique device that is plugged in.

Open the Registry Editor 1. From the Desktop select Start > Run. The Run window opens.

2. In the Run window Type regedit, then select OK. The Registry Edit window opens.

3. In the Registry Edit window, navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\FTDIBUS\Parameters\LocIds

To configure support for one Location ID Change FTDIBUS.INF to include the following fragments: [FtdiBus.NT.AddService]

AddReg = FtdiBus.NT.AddService.AddReg

[FtdiBus.NT.AddService.AddReg]




HKR,Parameters,"LocIds",1,23,00,00,00,00

In this example, one USB port is supported:

Location ID 0x00000023 represents host controller 1 port 3

To configure support for multiple Location IDs Change FTDIBUS.INF to include the following fragment: [FtdiBus.NT.AddService]

AddReg = FtdiBus.NT.AddService.AddReg

[FtdiBus.NT.AddService.AddReg]

HKR,Parameters,"LocIds",1,21,00,00,00,32,00,00,00,11,00,00,00,00

In this example, three USB ports are supported:

Location ID 0x00000021 represents host controller 1 port 1. Location ID 0x00000032 represents host controller 2 port 2.

Location ID 0x00000011 represents host controller 0 port 1.

Notes:

Location IDs are represented in the LocIds field as 4 hexadecimal bytes and in byte-reversed order.

Although on USB host controllers are indexed from 0 and ports from 1, Location IDs are calculated by adjusting the host controller number so that it is indexed from 1.

To Obtain Location IDs Location IDs can be obtained by using FTDI’s USBView utility. Use the following procedure to get the Location ID for a specific USB port:

4. Rn USBView

5. Plug a device into the port that is required.

6. From the menu select Options > LocationIDs.

7. Press <F5> to refresh the display. The port numbers are replaced with Location IDs of the form LocXY.

8. These locations are displayed in the left view pane of the utility. For example: Loc31

Error! Objects cannot be created from editing field codes.

Where, • X and Y are hexadecimal digits. • XY is the Location ID that is used in the LocIds field as described earlier.




FTDI Virtual Com Port registry modification

When using the D-Series USB RS422 Serial cable to attach panels to Windows machines (e.g. DALStation), a new COM port is allocated each time the cable is plugged into the PC unless the following registry settings are made. Having made the following changes, the COM port will remain static and allow you to configure the DALStation.ini file correctly.

Further information can be found on the manufacturer's website http://www.ftdichip.com/Ignore Hardware Serial Number:- If devices have the same vendor ID and product ID but different serial numbers, the system will normally treat them as different devices. This causes the drivers to be installed for each device and create registry entries for each device. It is possible to override this behavior to make the system ignore a device's serial number and treat all devices with matching VID and PID connected to the same USB port as if they were the same device.

This is achieved by adding a REG_BINARY value called IgnoreHWSerNum to the registry and setting it to 01.

This value is held in the registry key located at:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\UsbFlags\IgnoreHWSerNum{Device VID, PID and interface}

For a default FTDI device ID (VID 0x0403, PID 0x6001), add the following registry REG_BINARY value set to 01:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\UsbFlags\IgnoreHWSerNum04036001

For port A of an FT2232 device with default VID and PID, the IgnoreHWSerNum string would be:


and for port B of an FT2232 device the IgnoreHWSerNum string would be:


As the FT2232 device also uses the Windows composite device driver, an additional IgnoreHWSerNum entry is required to prevent Windows from creating additional composite driver registry entries:


Now the system can treat devices with the same vendor ID and product ID but different serial numbers, as the same device and install drivers for the first device only. As such, only one entry is created in the registry. If the device is connected to another USB port, the driver will have to be reinstalled for that port.

Note: IgnoreHWSerNum cannot be setup in FTDIBUS.INF or FTDIPORT.INF, it must be setup by editing the registry manually or by an installation utility BEFORE installing the driver.


http://www.ftdichip.com/Ignore



D-Series v3 Cabling

About D-Series v3 Cabling Since D-Series V4 systems are backward compatible with older D-Series V3 hardware, the older D-Series v3 hardware cabling standards are provided here for reference.

DAL Standard 2 Pair Cables (Approved Cable Belden 8723 or Bryant BD1902 as noted.)

Type AB The following graphic illustrates Type AB cable-end connector pinouts used to connect two (2) DAL RS-422 devices. Such as A SER-12 with a CON-8. Marked A and B as shown. Installed with A end connected to DAL master device. Cable type Belden 8723 or Bryant BD1902.

Type AC The following graphic illustrates Type AC cable-end connector pinouts used to connect DAL RS-422 devices wired to SONY RS-422 standard. Also includes Quartz and GVG. Marked A and C as shown. Installed with A end connected to DAL device. Cable type Belden 8723 or Bryant BD1902.




Type AG The following graphic illustrates Type AG cable-end connector pinouts used to connect DAL RS-422 devices to Oxtel RS-422 port. Marked A and G as shown. Installed with A end connected to DAL device. Cable type Belden 8723 or Bryant BD1902. Socket at G-end.

Type AH The following graphic illustrates Type AH cable-end connector pinouts used to connect DAL RS-422 devices to Pro-Bel or Quantel RS-422 devices. Marked A and H as shown. Installed with A end connected to DAL device. Cable type Belden 8723 or Bryant BD1902.




Type AJ (Amplicon RS422/232 Converter) The following graphic illustrates Type AJ cable-end connector pinouts used to connect DAL RS-422 devices to Amplicon 485F9 RS-422/RS-232 converter. Marked A and J as shown. Installed with A end connected to DAL device.

The Amplicon 485F9 RS-422/RS-232 converter is typically used in European markets.

GREEN

WHITE

SCREEN

BLACK

REDRX+4RX-5

3TX+8TX-9

3+TX4 -TX

6 +RX5 -RX

D9MA J

Note: A B&B RS-422/RS-232 converter is typically used in U.S. Markets. For information on cable wiring for the B&B RS-422/RS-232 converter see Type A-Special Cabling (Logomotion Control).

Type AK The following graphic illustrates Type AK cable-end connector pinouts used to connect DAL RS-422 devices to Routers. Marked A and K as shown. Installed with A end connected to DAL device. Cable type Belden 8723 or Bryant BD1902.

Type AL The following graphic illustrates Type AL cable-end connector pinouts used to connect DAL RS-422 devices to Aston Caption Generators. Marked A and L as shown. Installed with A end connected to DAL device. Cable type Belden 8723 or Bryant BD1902.




Type AM The following graphic illustrates Type AM cable-end connector pinouts used to connect DAL RS-422 devices to Sony ISARA. Marked A and M as shown. Installed with A end connected to DAL device. Cable type Belden 8723 or Bryant BD1902.

Type CC The following graphic illustrates Type CC cable-end connector pinouts used to connect two (2) SONY RS-422 devices. Marked C at both ends. May be installed in either direction. Cable type Belden 8723 or Bryant BD1902.




DAL Standard 1 Pair Cables (Approved Cable Belden 9451 or Bryant BD9001GRY as noted.)

Type DD The following graphic illustrates Type DD cable-end connector pinouts used to loop between DAL RS-485 devices. Marked D at both ends. Cable type Bryant BD9001GRY.

Type DF The following graphic illustrates Type DF cable-end connector pinouts used to connect DAL SER 8 to DAL Under Monitor Displays (UMDs) (1/2 RS-422). Installed with D-end connected to SER-8. F-end can loop on using an FF cable. Cable type Bryant BD9001GRY.

Type ED The following graphic illustrates Type ED cable-end connector pinouts used to connect DAL SER 8 card to RS-485 devices. Installed with E-end connected to SER-8. D-end can loop on using a DD cable. Cable type Bryant BD9001GRY.




Type FF The following graphic illustrates Type FF cable-end connector pinouts used to loop between DAL Under Monitor Displays (UMDs) (1/2 RS-422). Marked F at both ends. Cable type Bryant BD9001GRY.

Power Supply Cable Standards The PSU-125 connects to the Power Distribution Panel with PP cables. The cables from the Power Dist Panel to equipment is either PP or PD depending on whether the equipment has a Phoenix (P) or D15 (D) connector. Two typical types of supply cables are shown: Cable Type Belden 8465 and YY 5-Core 0.75mm2 Control Cable PP and PD (other Cable Types may be used).

Type PD and Type PP (Cable Type Belden 8465) The following graphics illustrate:

Type PD cable-end connector pinouts used with DB15-type connectors.

Type PP cable-end connector pinouts used with Phoenix-type connectors.




TYPE PP

TYPE PD

CABLE TYPE BELDEN 8465

+

-

+

-

-

31 2 54

PHEONIX

5

4

3

2

WHITE

BLACK

BROWN

RED

-

+

-

-

+

PHEONIX

1

5

4

3

GREEN

1

2

2

D15F

WHITE

BROWN

RED

15

14

12

13

10

11

8

7

6

5

4

3 +-

+

PHEONIX

BLACK

BLACK

GREEN

WHITE

BROWN

9

5

4

3

GREEN

RED

1

2

1 --

-

+

-

-

+




Type PD and Type PP (YY 5-Core o.75mm2 Control Cable) The following graphics illustrate:

Type PD cable-end connector pinouts used with DB15-type connectors.

Type PP cable-end connector pinouts used with Phoenix-type connectors.

TYPE PP

TYPE PD

CABLE TYPE YY 5-CORE 0.75mm CONTROL CABLE

+

-

+

-

31 2 54

PHOENIX

5

4

3

2

G/Y

4

3

2

-

-

+

-

-

+

PHOENIX

1

5

4

3

1

1

2

2

D15F

2

G/Y

15

14

4

2

12

13

10

11

8

7

6

5

4

3 +-

+

PHOENIX

3

G/Y

4

3

1

9

5

4

3

1

2

1

2

1 --

-

+

-

-

+




Type A-Special Cabling (B&B RS422/232 Converter)

Use the following cabling to connect DAL RS422 devices to B&B 422 Connection RS422 to RS232 converter. Installed with A-end connected to DAL device. Marked A and S as shown. Cable Type Belden 8723 or Bryant BD1902.

This diagram specifically shows Logomotion control.

Partyline Panel Cabling Standards The Party Line Distribution Panel (PLP) consists of 12 D9F connectors wired in parallel. It is used to connect multiple UMDs or NEPs together without looping. A special AA cable is used to connect from the CON-8 to the PLP.

Partyline Panel with Under Monitor Displays (UMDs)

4

5

SER-12-IF

9

3

8

5

4

8

9

3

CON-8

9

8

4

5

3

AB

8

9

3

PLPDD

8

9

3 1

8

3

DF UMD

UMD

3

8

1

DF

8

9

3Note that UMDs only use the transmit pair of RS422 (pins 8,9).




Partyline Panel with VTR Next Event Panels (NEPs)

3

9

8

9

8

4

5

3

SER-12-IF AB NEP

8

3

9

PLP

8

9

3

DD

NEP

3

DD

8

9

8

9

3Note that NEPs use RS485 and it is pins 4,5 that are active.

Serial-4 Card Cabling The Serial-4 card is used in MRC-2 Workstation computers. Use a standard CAT-5 network cable and one of the D9 Male to RJ45 socket adaptors (supplied with the Serial-4 card).




Cable Assembly




Serial-8 Card Cabling

Serial-8 Card Split Assembly for use with DALstation The following cable assembly is useful for supporting 2 hardware panels from a DALstation Workstation without needing a breakout box. This approach saves the bulk of a Serial-8 Interface.

Serial-8 Card Straight-Through DB25 Cable Serial-8 cards can be cabled directly to devices using standard DB-25 cabling.




CAT 5 Ethernet Cables (Standard and Crossover)

The following diagrams illustrate standard and CrossOver CAT 5 Ethernet cables and wire color codes.

Standard Cable CrossOver Cable




RJ45 Plugs viewed looking onto contacts. The latch is underneath.

RJ45 Plugs viewed looking onto contacts. The latch is underneath.



Reference Appendix

Appendix

RS-422/RS-485 Source: IDC Communications Instrumentation & Control Manual

From EIA Standards:

Re: RS422: "This standard specifies the electrical characteristics of the balanced voltage digital interface circuit... that may be employed when specified for the interchange of serial binary signals between Data Terminal Equipment (DTE) and Data Circuit Terminating Equipment (DTE) or any point to point interconnection of serial binary signals between digital equipment.

The interface circuit includes a generator connected by a balanced interconnecting cable to a load consisting a receiver or receivers..."

Re: RS485: "This standard specifies the electrical characteristics of generators and receivers that may be employed when specified for the interchange of binary signals in multipoint interconnections of digital equipment. When implemented within the guidelines of this standard, multiple generators and receivers may be attached to a common interconnecting cable.

The parameter values specified in this standard are similar to those in RS-422. These values allow generators and receivers to be designed to meet the requirements of both standards."

Specifications TRANSMITTER RS-422 RS-485

Mode of Operation Differential Differential

Max. No. of Drivers 1 32

Max. No. of Receivers 10 32

Max. Cable Length 1200m 1200m

Max. Data Rate 10Mbps 10Mbps

Max. Common Mode Voltage +6V to -0.25V +12V to -7V

Driver Output Signal +/-2.0V Min. +/- 1.5V Min.

+/- 6.0V Max. +/- 6.0V Max.



Reference Appendix

TRANSMITTER RS-422 RS-485

Driver Load 100 Ohms 60 Ohms

Receiver Input Resistance > 4 KOhms > 12 KOhms

Receiver Sensitivity +/- 200mV +/- 300mV

-7 < Vcm =< +7V -12V =< Vcm =< +12V


d-series™ cabling standards

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