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Rs-422 (ibs) or 8 kbps esc (idr) (j2), Ibs/rs-422 (j2) – Comtech EF Data UB-530 User Manual

Page 19

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Breakout Panel

Revision 2

Connectors and Switches

MN/UB530.IOM

2–7

2.2.2 RS-422 (IBS) or 8 kbps ESC (IDR) (J2)

The

RS-

422 or 8 kbps ESC (IDR) connection is a 37-pin D connector located at the front

of the breakout panel. Screw locks are provided for mechanical security of the mating
connector.

The

connection

will operate as either an IBS (standard RS-422) or an IDR (8-kbps ESC)

I/O, depending on the configuration switch settings on the rear panel (see Section 2.1).

2.2.2.1 IBS/RS-422

(J2)

Signal Function

Name

Pin #

Ground

GND

1, 19, 20, 37

TX octet

TXO–A

3

TXO–B

21

Send data

SD–A

4

SD–B

22

Send timing

ST–A

5

ST–B

23

Receive data

RD–A

6

RD–B

24

Request to send

RTS–A

7

RTS–B

25

Receive timing

RT–A

8

RT–B

26

Clear to send

CTS–A

9

CTS–B

27

Data mode

DM–A

11

DM–B

29

Receiver ready

RR–A

13

RR–B

31

External clock

EXC–A

15

EXC–B

33

RX octet

RXO–A

16

RXO–B

34

Terminal timing

TT–A

17

TT–B

35