Communication Wiring; Rs-232C Wiring; Wiring - Toho Electronics TRM-10C Instruction Manual

4.4 Communication Wiring

CAUTION
Precautions for the communication wiring
① See that no noise is mixed in communication wiring. For communication wiring, it is recommended to
use a shielding wire effective for noise.
② When it is likely to be affected by induction noise, particularly when wiring near the high-frequency
power source, it is recommended to use a shielded twisted wire.
③ Attach a ring terminal with insulated sleeve (for M3.5) to the end of the electric wire.
④ Ground the shield of a connecting wire.
⑤ To comply with EN61010-1, do not connect AC to the alarm output when using RS-485.

4.4.1 RS-232C Wiring

Wire RS-232C refer to Fig.4.10.
1A 1C 2A
4+ 4- 4
B A
B
1- 1
1+
B B A
Fig. 4.10 RS-232C Wiring
4.4.2 RS-485 Wiring
Wire RS-485 refer to Fig.4.11.
2A 2C
1A 1C
Fig. 4.11 RS-485 Wiring
2C 3A 3C 4A 4C 5A 5C 6A
6-
5+ 5- 5 6+ 6
B B B A
B A COM
2- 3+ 3- 3
2+ 2
B
B B A B A
3A 3C 4A 4C 5A 5C
L N
6C
+
-
DI DI DI DI
3 2 1
TD RD SG
Host computer
L N
6A 6C + -
Ｒｔ
.........
TRM-10C
―22―
[Note]
Cable length is a maximum
of 15m.
SG
RD
TD
[Note]
① Be sure to attach terminating resistance
(Rt 200Ω) to a host computer side.
② Connection is a maximum of 32 sets
including a host computer.
③ Cable length is a maximum of 1.2 km.
④ Use the UL20620-SB (M) cable made
by HITACHI CABLE LTD. or
equivalent.
Host computer
Ｒｔ
TRM-10C
HXPRM10mnCT001E
－
＋