ABB 500FSD10 User manual

Brand: ABB

Model: 500FSD10

Type: User manual

Manual

Modem 1200 baud 500FSD10

EDS500 series - FSK modems

Application, characteristics and technical data have to

be taken from the hardware data sheet:

500FSD10 Data sheet 1KGT150982

Operation

The 500FSD10 modem is a CCITT V.23 modem for

snap-in DIN-rail mounting. V.23 operates with the

frequency shift keying method (FSK). The modem can

operate in two- and four-wire connection. The mode of

operation is set by means of a twelve-fold DIP-switch.

Connections

Power connector for compact devices (X1)

The EDS500 series devices are equipped with a wide

range power supply for voltages between 24 and

60 Volts (power consumption see device label). The

connector is a 3-pin Phoenix plug with screw terminals.

Pin allocation power supply

Pin Signal

1 VIN+ (24-60 VDC)

2 Shield connected to functional earth

1 2 3

3 VIN-

ADVICE

Due to the internal overvoltage protection,

interrupt any connection to ground of the device

for the time of the measurement before you carry

out isolation measurement. This includes the

earthing of the hat rail as well as all shields of all

transmission lines and supply feedings. RJ-12 plugs

or RJ-45 plugs can establish earthing via the shield.

Serial Interface to DTE (X2)

The RJ-45 connector X2 forms an RS-232-D interface. If

the modem is connected to a terminal unit, an adapter

cable has to be used which connects the pin pairs.

Pin allocation serial interface DTE (RJ-45)

RS-232-D

Pin Signal

V.24

Signal

V.28

Direction

1 DSR M1 107 output

8 1

2 DCD M5 109 output

Pin allocation serial interface DTE (RJ-45)

3 DTR S1 108.2 input

4 GND GND -

5 RxD C2 104 output

6 TxD D1 103 input

7 CTS M2 106 output

8 RTS S2 105 input

Interface to transmission line (X3)

In two-wire mode X3-1 and X3-2 form terminal NF1

which is used for transmission and reception.

In four-wire mode X3-1 and X3-2 form the transmitter

terminal NF1 and X3-3 and X3-4 form the receiver pair

NF2.

NF terminals

transmit receive

2-wire NF1: X3-1 and X3-2 NF1: X3-1 and X3-2

4-wire NF1: X3-1 and X3-2 NF2: X3-3 and X3-4

Pin allocation transmission line interface (X3)

Pin Signal

1 NF1a

2 NF1b

3 NF2a

4 3 2 1

4 NF2b

Signaling

LED Description Function

off Device is without

power supply

Power Voltage

Supply

green Power supply

switched on

off DTE does not

send

RTS Request to

send

green DTE requests

to send via the

modem

LED Description Function

off CTS inactiveCTS Clear to

send

green The CTS is

switched on when

the carrier is

being established.

A transmit delay

time of 20-30ms

has to be adjusted

in DTE settings.

off No signal receivedDCD

green Signal received

from DTE

Settings

The DIP-switch S1 establishes the mode of operation

of the modem.

Switch C-1 is reserved for future use. C-2 establishes a

permanent carrier on the line which is useful in a four-

wire fullduplex connection.

Switch 2-W distinguishes between two-wire and

four-wire operation of the modem. In two-wire mode

X3-1 and X3-2 form terminal NF1 which is used for

transmission and reception. In four-wire mode X3-1

and X3-2 form the transmitter terminal NF1 and X3-3

and X3-4 form the receiver pair NF2.

The next three switches belong to the transmitter

amplitude. In a long multi-drop line configuration,

where the modem in the central needs a high

amplification factor to receive the signal of the last

modem, the transmission level of the modem next to

the central station can be reduced by 20 dB with the

–20dB switch. This is done to avoid overdrive of the

receiver in the central station modem. To compensate

a low-pass character of the transmission line, the

amplitude of the upper transmission frequency can

be increased by 20 %, 40 % and 60 %. If both switches

20% and 40% are ‘off’, no increasing of the amplitude

takes place.

The 500FSD10 has five predefined receiver

amplifications: 0 dB, 10 dB, 20 dB, 30 dB and 40 dB.

These are set by the switches 10dB to 40dB. Only one

amplification DIP switch is allowed to be in the 'on'

position at a time.

If the 500FSD10 is to be terminated with the line

impedance, the DIP switches T-T and T-R need to be

switched to 'on'. This is usually the case at both ends

of the line. If the modem is to be connected in a party-

line manner in between, these DIP switches have to

be ’off’. T-T terminates the low frequency (LF) line

NF1, which is formed by terminals X3-1 and X3-2. T-

R terminates the receiver pair NF2 of the four-wire

configuration with terminals X3-3 and X3-4.

left – ‘off’ right – ‘on’

C-1 for future use for future use

C-2 switch on sender

with RTS

carrier always

active (four-wire)

2-W four-wire mode two-wire mode

left – ‘off’ right – ‘on’

-20dB normal sending

power

decrease sending

power by 20 dB

20% both raising

factors active: 60

raise upper

frequency

amplitude by 20

40% of upper

frequency

amplitude, none

active: no raise

raise upper

frequency

amplitude by 40

10db 10 dB amplifi-

cation

20db 20 dB amplifi-

cation

30db 30 dB amplifi-

cation

40db

only one factor

allowed to be

active, all off: 0

40 dB amplifi-

cation

T-T no termination

NF1 (> 6 kΩ)

line termination

NF1

T-R no termination

NF2 (> 6 kΩ)

line termination

NF2

Safety

DANGER

Interrupt the power supply before mounting or

dismounting the device.

WARNING

An easy to access manual interrupter has to be

installed into the power feed of the modem to be

able to disconnect the modem from the power

supply in the case of an emergency.

WARNING

The DC power supply has to fulfil the following

requirements in order to supply appropriate fire

protection:

•

Limited power source according to IEC 60950-1

or PS2 classified according to IEC 62368-1

•

Short-circuit current < 8A

WARNING

No plug shall be freely accessible in normal

operation due to safety reasons.

Installation

ADVICE

The 500FSD10 modem is a protection class II device

with functional earthing.

Functional earthing must be done properly in order

for the overvoltage protection of the modem to

work properly.

Correct functional earthing is accomplished by

snapping the modem on the properly earthed DIN-

rail (making contact to backside functional earth

contacts) and additionally connecting terminal X1-2

(SHIELD) to an earthing terminal on the DIN-rail.

"Fig. 4: Schematic installation drawing" shows a

schematic drawing of the correct installation of the

modem. X1-2 has to be connected to functional earth.

Terminal X1-1 is connected to the positive terminal and

X1-3 to the negative terminal of a DC power supply.

The communication line can be either connected in

two-wire or four-wire configuration. For two-wire

configuration connect terminal X3-1 and X3-2 to the

pair of wires. For four-wire configuration connect

terminal X3-1 and X3-2 to the pair of wires used for

transmit direction and X3-3 and X3-4 to the pair used

for receive direction.

The internal transformers of the 500FSD10 have

a galvanic isolation of 3 kV. If a higher level of

protection is needed, additional isolation low-

frequency (LF) transformers have to be used.

See "Fig. 5: Communication line connection by LF

transformer (two-wire connection)" and "Fig. 6:

Communication line connection by LF transformer

(four-wire connection)"for the installation scheme.

Finally, the serial interface has to be connected to the

local data termination equipment (DTE) by connecting

X2 of the 500FSD10 to the serial interface of the DTE

by a shielded serial cable, e.g. 500CAB08, 500CAB09.

Figure 1: 560FSD10

Figure 2: 500FSD10 Front plate

Figure 3: 500FSD10

Label

1 2 3

1 2 3 4

Connect DIN-rail to

Protection earth

Figure 4: Schematic installation drawing

NF2a

NF2b

NF1a

NF1b

A1 A1

E1 E1

A2 A2

E2 E2

T-T

T-R

NF1

NF2

OVP

Figure 5: Communication line connection by LF transformer (two-wire connection)

NF2a

NF2b

NF1a

NF1b

A1 A1

E1 E1

A2 A2

E2 E2

A1 A1

E1 E1

A2 A2

E2 E2

T-T

T-R

NF2

NF1

Receive

Transmit

LF signal transformer

OVP

Figure 6: Communication line connection by LF transformer (four-wire connection)

1KGT150983 V000 1

ABB AG

Power Grids

P.O. Box 10 03 51

68128 Mannheim, Germany

Tel. +49 621 381-3000

www.abb.com/remote-terminal-units

We reserve the right to make technical

changes or modify the contents of this

document without prior notice. With

regard to purchase orders, the agreed

particulars shall prevail. ABB AG does not

accept any responsibility whatsoever

for potential errors or possible lack of

information in this document.

We reserve all rights in this document and in

the subject matter and illustrations contained

therein. Any reproduction, disclosure to third

parties or utilization of its contents – in whole

or in parts – is forbidden without prior written

ABB 500FSD10 User manual

ABB 500FSD10 User manual

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