SAMWONTECH
4th Edition of TEMI880 IM : Jan. 29. 2007 Page 17 / 119
1.4.2.10 Communication(RS485/RS232C) Wiring
▶ Before starting communication wiring, be sure to turn off the system,
or else you will get an electrical shock.
1.4.2.10.1 RS485 Wiring
▶ The slave side(TEMI880) can accommodate up to 99 units in a MULTIDROP connection.
▶ Be sure to connect a terminating resistance(220Ω 1/4W) to the units at the both.
1.4.2.10.2 RS232C Wiring
▶ Connector : Wiring with 9 Pin
CAUTION
Master Station
TEMI880
Controller
Class 3 Ground
SHIELD
Termination
Resistance
RTX+
RTX-
SG
Class 3 Ground
Termination
Resistance
Controller
RTX+
RTX-
SG
RTX+
RTX-
SG
TEMI880
Master Station
RD
TD
RTS
CTS
SG
SHIELD
2
3
7
8
5
RxD
TxD
SG
2
3
5
TEMI880
D-Sub 9Pin Female