Westermo TD-23 Installationshandbuch PDF herunterladen (Seite 7)

25-pos. Screw Direction Name Description

D-sub Terminal DCE-DTE

1 - - - PE Protective earth

2 8 TXD Transmit data

3 7 RXD Receive data

4 6 RTS Request to send

5 5 CTS Clear to send

6 2 DSR Modem ready

7 1 - - - SG Signal ground

8 4 DCD Data carrier detect

9 Continuous high

10 Continuous low

12 DRS Speed indication (1200/2400)

15 TXC Synchronous TXD clock from modem

17 RXC Synchronous RXD clock from modem

20 3 DTR Data terminal ready

21 RDL Request of remote digital loop back

22 9 RI Ring indicator

23 DRS Data speed select (1200/2400)

24 EXC External synchronous clock

25 TI Test indication signal

76178-2203

RS-232/V.24 Connections

Pin outs for the 25-pole D-sub and 9-pole screw terminal:

The other pins in the 25-pole D-sub should be left unconnected.

←

Line connection

The telephone line is connected to the 6-pole RJ-12

connector or to the 4-pole screw block in the bottom

left side.

When using the screw-block a strap plug supplied must

be placed in the RJ-12 connector.

If this is not done the outgoing signal will not be

connected to the screw-block.

1 2 3 4

2-wire lines are connected to the two middle pins (3 & 4)

in the RJ-12 plug or the TX screws (1 & 2).

In the UK modems the 2-wire line is connected to pin 2 & 5

in the RJ-12 connector.

4-wire lines are connected to the screw terminal, transmitter

to TX (1 & 2) and receiver to RX (3 & 4).

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Westermo TD-23 Installationshandbuch Seite 7