3. Cabling
3-78
TI 33Q01J10-01E
3.7.10
Connecting Signal Cables with Communication
Modules
RS-232C Communication Module ACM11
CN1
CN1
RDY
RCV
SND
YOKOGAWA
YOKOGAWA
RDY
RCV
SND
F030719.ai
AMN33
Figure ACM11 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 position
Code
Signal
Description
1
FG
Frame Ground
Maintenance grounding
2
SD
Send Data
Transmission data (output)
3
RD
Receive Data
Receiving data (input)
4
RS
Request to Send
Transmission request (output)
5
CS
Clear to Send
Ready for transmission (input)
6
DR
Dataset Ready
Dataset ready (input)
7
SG
Signal Ground
Signal common return
8
CD
Carrier Detect
Carrier detection (input)
20
ER
Equipment Ready
Data terminal ready (output)
IMPORTANT
When the system is used in Europe, attach a clamp filter (ferrite core) complying with the EMC
standard in order to use RS-232C.
The parts number of the clamp filter is A1179MN.
May 18, 2007-00