CTC Union ETU-01A - User Data Channel Connector

Appendix A. I/F Specifications
121
November 2001
A.4 RS-530 User Data Channel Connector
When the ETU-01A is ordered with an RS-530 interface,
the physical interface is a 25-pin female D-type connector wired
in accordance with Table A-5.
SIGNAL
FUNCTION
PIN
CIRCUIT
DIRECTION
DESCRIPTION
Protective
Ground
1 Frame ↔↔ Chassis ground.
May be isolated from signal ground.
Signal
Ground
7 AB ↔↔ Common signal ground.
Transmitte
d
Data
2
14
BA(A)
BA(B)
To ETU-01A Serial digital data from DTE.
Received
Data
3
16
BB(A)
BB(B)
From ETU-
01A
Serial digital data at the output of the
ETU-01A receiver.
Request to
Sent
4
19
CA(A)
CA(B)
To ETU-01A A ON signal to the ETU-01A when data
transmission is desired.
Clear to
Sent
5
13
CB(A)
CB(B)
From ETU-
01A
Constantly ON.
Data Set
Ready
6
22
CC(A)
CC(B)
From ETU-
01A
Constantly ON,
Except during test loops.
Data
Terminal
Ready
20
23
CD(A)
CD(B)
To ETU-01A DTR not used, used for a received
serial data rate clock input from the
DTE.
Data
Carrier
Detect
8
10
CF(A)
CF(B)
From ETU-
01A
Constantly ON, except when a loss of
the received carrier signal is detected.
External
Transmit
clock
24
11
DA(A)
DA(B)
To ETU-01A A transmitted data rate clock input
from the data source.
Transmit
Clock
15
12
DB(A)
DB(B)
From ETU-
01A
A transmitted data rate clock for use
by an external data source.
Receive
Clock
17
9
DD(A)
DD(B)
From ETU-
01A
A received data rate clock for use by an
external data source.
Remote
Loopback
21 RL To ETU-01A When on, commands ETU-01A into
remote loopback, can disable by dipsw.
Local
Loopback
18 LL To ETU-01A When on, commands ETU-01A into
local loopback, can disable by dipsw.
Test
Indicator
25 TM From ETU-
01A
ON during any test mode
Table A-5 RS-530 user data channel connector pin allocation