User manual

Chapter 2. Port Card Overview
2-5 FMUX-01Mar 2003
When the MULTIPLEXER UNIT 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
MULTIPLEXER UNIT receiver.
Request to
Sent
4
19
CA(A)
CA(B)
To MUX UNIT A ON signal to the MULTIPLEXER UNIT 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 MULTIPLEXER UNIT
into remote loop back.
Local
Loop back
18 LL To MUX UNIT When on, commands MULTIPLEXER UNIT
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