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ABB Utility Communications Systems

Introduction to PLS100.

Block diagram of PLS100.

Photograph of PLS100.

Product Features.

How PLS100 reduces no of PLC links ?

Typical application with Power Line Carrier System.

Actual Application in Gujarat Electricity Board.

Typical Application with Fiber Optic System as EOW/Conf.

Actual Application In Indian Railways.

Party Line System type PLS100

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Introduction to PLS100.

The PLS100 design is a partyline system with selective calling / all calling

facility using inband dialing.

It can be used as a conference equipment with directions East, West and

North using a 4-way amplifier. This can be used with the traditional Power

Line Carrier Systems.

Additionally it can also accommodate optional 64 KBPS digitiser cards sothat it can be connected to the V.11 / 64KBPS interface of Digital

Communication Equipment such as Fox-U of ABB.

It is intended that the system should use a standard 2-wire telephone

with only DTMF dialing. Hence the client can also change the telephone

instrument if he so desires.

It is available in Table Top or 19rack version which can be mounted in the

same cubicle as PLC or Fox using existing 48VDC supply.

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Block diagram of PLS100.

4-Way Amplifier

ADC+DAC

V.11 port 3

ADC+DAC

V.11 port 1

DTMF Receiver

2W Tel. Interface

Direction West Direction East

ADC+DAC

V.11 port 2

Direction North

Speaker

3 Nos. optional V.11/64KB digital ports

3 Nos. 4W ports

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Photograph of PLS100.

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Product Features.

- Reduces the number Communication equipments due to shared omnibus channel.

- Channel / Any station is always available.- 4 way bridging amplifier allows connection to 3 external directions.

- Linear or Star / T-networks are possible.

- 2 digit DTMF dialing is possible using any ordinary DTMF telephone.

- Ring back tone is possible which can be disabled.

- Group i.e. All station dialing is possible.

- Additional speaker monitoring is possible.- Full-duplex voice.

- Though freq. range is 0.3 to 3.6kHz, it works satisfactorily with 2 KHz

transmission bandwidth also.

- Can be directly connected to any 4 wire equipment.

- 4 wire level adjustment is possible viz. 3.5dB + 4dB.

- Optional but built-in ADCs allow connection on V.11 / 64KB ports.

- Much cheaper compared to an EPAX.

- Practically little or no maintenance required.

- Works on standard 48VDC power supply.

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How PLS100 reduces no of PLC links ?

While using PLC with Standard EPAX & dedicated trunks.

Stn.1 Stn.2 Stn.3 Stn.4 Stn.5 Stn.6 Stn.7

For 7 stations, No of single Chnl PLC equipments required = 42

While using PLC with PLS100 by sharing the channel.

Stn.1 Stn.2 Stn.3 Stn.4 Stn.5 Stn.6 Stn.7

For 7 stations, No of single Chnl PLC equipments required = 12

Stn.1

Legend:

= Station

= 1 Chnl PLC eqpt.

= EPAX

= PLS100

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Typical application with Power Line Carrier System

PLCC

e.g.ETL41

O4LC

PLS100

PLCC

e.g.ETL41

O4LC

PLS100

PLCC

e.g.ETL41

O4LC

Station: 01

Station: 03

PLCCe.g.ETL41

O4LC

PLCC

e.g.ETL41

O4LC

PLCC

e.g.ETL41

O4LC

PLS100

PLCC

e.g.ETL41

O4LC

PLCC

e.g.ETL41

O4LC

PLS100

PLS100

Station: 02 Station: 04 Station: N

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Typical Application with Fiber Optic System as EOW/Conf.

FO/MW

e.g.Fox

TUNOS

PLS100 PLS100

Station: 01

Station: 03

TUNOS

FO/MW

e.g.Fox

TUNOS

PLS100

FO/MW

e.g.Fox

TUNOS TUNOS

FO/MW

e.g.Fox

TUNOS

PLS100

PLS100

Station: 02 Station: 04 Station: N

FO/MW

e.g.Fox

TUNOS TUNOS

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Actual Application In Indian Railways.

FO/MW

e.g.Fox

TUNOL

PLS100 PLS100

Baroda

FO/MW

e.g.Fox

TUNOS

PLS100

4 Nos Repeaters Ahmedabad

FO/MW

e.g.Fox

TUNOL TUNOL

PLS100

Anand

FO/MW

e.g.Fox

TUNOL TUNOL

PLS100

3 Nos Repeaters

FO/MW

e.g.Fox

TUNOL TUNOL

Distance between repeaters is around 5-10 Kms and total distancebetween Baroda and Ahmedabad is around 110 Kms.

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Comparison between PLS100 & EPAX.

PLS100. EPAX

Communication channel is shared. Communication channel is dedicated.

While using PLS, only 1 link per direction is reqd. No. of channels or links is equal to no. of trunks of EPAX.

Channel is never busy. If channel is busy, new person cannot make a call.

There is no privacy in speech. There is privacy in speech.

It is very cheap. EPAX is expensive.

Due to reduction in no. of communication eqpts

required, the total system is quite cheap.

The total communication system is very expensive.

Minimum maintenance of PLS100 & of the

communication system as a whole.

Maintenance required for the EPAX & also all the

communication equipments with which it is used..

Speech is possible on digital V.11/64KB links in

addition to 4 wire.

Speech is possible only on 4 wire unless it is a very

sophisticated EPAX.

Installation is very easy and convenient. Installation / commissioning requires special trained person.

Group dialing facility possible. Not applicable though conference option may be available.PLS100 is typically useful to operators /

maintenance persons for multi station conference.

EPAX is useful for larger stations with many people. Used

for operation & maintenance & also administrative

functions.When used as EOW with FO/MW, quick comm. isestablished. This helps during installation & also

during 2MB / 8MB / EPAX breakdown.

EPAX cannot be used as Engineering Order Wire.

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Performance Certificate for PLS100.

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