Chapter 2. Port Card Overview
15
Version 1.2 Apr 2006
When the
Fiber Multiplexer
is ordered with an
RS530 Port Card
option, a
4-CHANNEL
RS-530 Card
and adapter cable are supplied with each DB25 wired according to the following
table.
SIGNAL
Function
DB25
PIN
CIRCUIT DIRECTION
DESCRIPTION
Protective
Ground
1 Frame
<->
Chassis
ground.
May be isolated from signal ground.
Signal Gnd
7
AB
<->
Common signal ground.
Transmitted
Data
2
14
BA(A)
BA(B)
To
MUX UNIT
Serial digital data from DTE.
Received
Data
3
16
BB(A)
BB(B)
Fm
MUX UNIT
Serial digital data at the output of the
Fiber
Multiplexer
receiver.
Request to
Sent
4
19
CA(A)
CA(B)
To
MUX UNIT
A ON signal to the
Fiber Multiplexer
when
data transmission is desired.
Clear to
Sent
5
13
CB(A)
CB(B)
Fm
MUX UNIT
Constantly
ON.
Data Set
Ready
6
22
CC(A)
CC(B)
Fm
MUX UNIT
Constantly
ON,
Except during test loops.
Data
Terminal
Ready
20
23
CD(A)
CD(B)
To
MUX UNIT
DTR not used, used for a received serial data
rate clock input from the DTE.
Data Carrier
Detect
8
10
CF(A)
CF(B)
Fm
MUX UNIT
Constantly ON, except when a loss of the
received carrier signal is detected.
External
Transmit
clock
24
11
DA(A)
DA(B)
To
MUX UNIT
A transmitted data rate clock input from the
data source.
Transmit
Clock
15
12
DB(A)
DB(B)
Fm
MUX UNIT
A transmitted data rate clock for use by an
external data source.
Receive
Clock
17
9
DD(A)
DD(B)
Fm
MUX UNIT
A received data rate clock for use by an
external data source.
Remote
Loop back
21 RL
To
MUX UNIT
When on, commands
Fiber Multiplexer
into
remote loop back.
Local
Loop back
18 LL
To
MUX UNIT
When on, commands
Fiber Multiplexer
into
local loop back.
Test Indicator 25
TM
Fm
MUX UNIT
ON during any test mode
Table 2-4 : DB25 adapter cable pin out for RS-530
