17
2
Wiring
Wiring
RS232C/RS485 INTERFACE
SCU Connection Signal
●
External device referred above means a variety of RS232
and RS485 devices.
●
Typical wiring methods are as follows:
1. RS232 Wiring: 3-wire method without flow control
(common wiring method)
2. RS485 Wiring: End termination resistance is built-in.
PIN NO
Signal Name
Mnemonic
Direction
SCU
External device
1
FRAME GROUND
FG
2
SEND DATA
SD
3
RECEIVE DATA
RD
4
5
SIGNAL GROUND
GND
6
485 TRANSIVER-
485-
7
485 TR
485+
8
9
POWER
+5V
12
345
67
89
Connector (9P)
