3. Cabling
3-82
TI 33Q01J10-01E
RS-232C Communication Card ACM21
F030723.ai
AMN51
Figure ACM21 Signal Cable Connection
Use modem cable KB3 and null modem cable KB4 with a D-Sub 25-pin connector.
Table RS-232C Interface Connector Pin Positions
Pin Assign Signal Abbreviation
Signal Name
Description
1
FG
Frame Ground
Maintenance grounding
2
SD
Send Data (output)
Transmission data (output)
3
RD
Receive Data
Receiving data (input)
4
RS
Request to Send (output)
Transmission request (output)
5
CS
Clear to Send
Ready for transmission (input)
6
DR
Dataset Ready (input)
Dataset ready (input)
7
SG
Signal Ground
Signal common return
8
CD
Carrier Detect (input)
Carrier detection (input)
20
ER
Equipment Ready (output) Data terminal ready (output)
May 18, 2007-00