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24
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HXPRM10mnCT002E
4.4 Communication Wiring
4.4.1 RS-232C Wiring
図
4.10
に従い、ＲＳ－２３２Ｃを配線します。
Fig.4.10
RS-232C Wiring
4.4.2 RS-485 Wiring
Wire RS-485 refer to Fig.4.11.
Fig. 4.11
RS-485 Wiring
CAUTION
Precautions for the communication wiring
・
See that no noise is mixed in communication wiring. For communication wiring, it is recommended to
use a shielding wire effective for noise.
・
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.
・
Attach a round press-fitting terminal with insulated sleeve (for M3.5) to the end of the electric wire.
・
Ground the shield of a connecting wire.
［
Note
］
Cable length is a maximum of 15m.
［
Note
］
①
Be sure to attach terminating resistance
(Rt 200
Ω
) 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.
1A
2C
2A
1C
3A 3C
1+
B
1-
B
1
A
2+
B
2-
B
2
A
SG
RD
TD
DI
COM
DI
3
DI
2
DI
1
+
-
SG
RD
TD
Host computer
L
N
1A
1C
2A
2C
3A
3C
+
-
－
＋
Host computer
Ｒｔ
TRM-10C
………
TRM-10C
Ｒｔ