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Installation and Operation Manual
DB25 adapter cable pin out for RS-530
Signal Function
Protective Ground
DB-25 Pin#
RS-530 circuit
Direction
1
Frame
<->
Description
Chassis ground.
May be isolated from signal ground.
Signal Ground
7
AB
<->
Common signal ground.
Transmitted Data
2
BA(A)
To MUX
Serial digital data from DTE.
14
BA(B)
UNIT
3
BB(A)
Fm. MUX
Serial digital data at the output of the Fiber
16
BB(B)
UNIT
Multiplexer receiver.
4
CA(A)
To
An ON signal to the Fiber Multiplexer
19
CA(B)
UNIT
when data transmission is desired.
5
CB(A)
Fm. MUX
Constantly ON.
13
CB(B)
UNIT
6
CC(A)
Fm. MUX
Constantly ON,
22
CC(B)
UNIT
Except during test loops.
Data Terminal
20
CD(A)
To MUX
DTR not used, used for a received serial
Ready
23
CD(B)
UNIT
data rate clock input from the DTE.
Data Carrier
8
CF(A)
Fm. MUX
Constantly ON, except when a loss of the
Detect
10
CF(B)
UNIT
received carrier signal is detected.
External Transmit
24
DA(A)
To
A transmitted data rate clock input from the
clock
11
DA(B)
UNIT
data source.
Transmit Clock
15
DB(A)
Fm. MUX
A transmitted data rate clock for use by an
12
DB(B)
UNIT
external data source.
17
DD(A)
Fm. MUX
A received data rate clock for use by an
9
DD(B)
UNIT
external data source.
21
RL
To
When on, commands Fiber Multiplexer
Received Data
Request to Sent
Clear to Sent
Data Set Ready
Receive Clock
Remote
Loop
back
Local Loop back
Test Indicator
18
25
LL
TM
MUX
MUX
MUX
UNIT
into remote loop back.
To
When on, commands Fiber Multiplexer
MUX
UNIT
into localloop back.
Fm. MUX
ON during any test mode
UNIT
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