Samwon Tech TEMP880S - Page 19

SAMWONTECH
1st Edition of TEMP880S IM : Sep. 21. 2005 Page 17 / 101
1.4.2.10 Communication(RS485/RS232C) Wiring
▶ Turn off TEMP880S mainframe power and external power supply when wiring communication
▶ due to danger of electric shocks.
1.4.2.10.1 Wiring RS485
▶ It is possible for slave (TEMP880S) to connect multidrop maximum of 99.
▶ For TEMP880S or MASTER (PC, PLC), connect division resistance(200Ω 1/4W) on both sides of
▶ communication channel.
1.4.2.10.2 Wiring RS232C
▶ CONNECTOR : Wiring with D-Sub 9 PIN
Caution
Master Station TEMP880S
T
E
RMINA
L B
OAR
D
Class 3 Ground
SHIELD
Division
Resistance
RTX+
RTX-
SG
Class 3 Ground
Division
Resistance
RTX+
RTX-
SG
RTX+
RTX-
SG
TEMP880S
Master Station TEMP880S
RD
2
3
7
8
5
TD
RTS
CTS
SG
SHIELD
2
3
5
RxD
TxD
SG
D-Sub 9Pin Female
T
E
RMINA
L B
OAR
D