Specifications

Appendix 6 Universal Serial Communications App6-9
1 : n Connection
* When you go to [Comm. Parameters] under the [System Setting], to [Main2], and check [Execute 4
Wire Control], 1 : n connection is not available.
• Wiring
Perform wiring as shown below.
<2-wire system>
- When TC485 is used:
- When TC485 is not used:
Install jumpers between +RD/+SD and −RD/−SD.
<4-wire system>
• Twist-shielded Cables
- Use twist-shielded cables provided by the following manufacturers.
FG
+SD
−SD
+RD
−RD
FG
RDA
RDB
SDA
SDB
FG
+SD
−SD
+RD
−RD
FG
+SD
−SD
+RD
−RD
SG SGSGSG
V+TC485 (SW: Lower)
Terminating resistance
(ON)
* Use twist-shielded cables.
V+TC485 (SW: Lower) V+TC485 (SW: Lower)
General-purpose
computer
Signal
Name
Signal
Name
Signal
Name
Signal
Name
Terminating resistance
(OFF)
Terminating resistance
(OFF)
FG
+SD
−SD
+RD
−RD
FG
RDA
RDB
SDA
SDB
FG
+SD
−SD
+RD
−RD
FG
+SD
−SD
+RD
−RD
SG SGSGSG
V+TC485 (SW: Upper)
Terminating resistance
(ON)
* Use twist-shielded cables.
V+TC485 (SW: Upper) V+TC485 (SW: Upper)
General-purpose
computer
Signal
Name
Signal
Name
Signal
Name
Signal
Name
Terminating resistance
(OFF)
Terminating resistance
(OFF)
Manufacturer Type
Hitachi Cable CO-SPEV-SB(A) 3P × .3SQ
Mitsubishi Cable SPEV-SB-MPC 3P × .3SQ