21
Connections and Wiring
Section 2-4
2-4-3
Wiring for Safety and Noise Immunity
R/W Head Cables and I/O
Signal Lines
Wire the R/W Head cables and I/O signal lines in separate ducts from power
circuit cables both inside and outside the control panel.
If the same ducts must be used, shielded cables can be used to increase
resistance to noise. If a shielded cable is used, connect one end of the shield
to ground.
Countermeasures for
Inductive Loads
If I/O is connected to an inductive load, connect a surge killer or diode in par-
allel with the load.
Note
Use surge killers and diodes that meet the following conditions:
Noise Countermeasures
for External Wiring
Consider the following items when wiring external lines, such as the R/W
Head cables, I/O lines, power supply lines, and high-power lines.
• When using multiconductor cables for signal lines, do not use the same
cable for both I/O lines and other control lines.
(1)
Suspended ducts
Floor ducts
Conduits
(2)
(1)
(2)
(1)
(2)
(1): I/O cables
(2): Power lines
L
IN
COM
DC input
Surge killer
OUT
COM
Diode
OUT
COM
Relay contact output
Triac output
Relay contact output
Transistor output
L
+
Diode
Surge Killers
Resistance: 50
Ω
Capacitance: 0.47
µ
F
Voltage:
200 V
Diodes
Inrush withstand voltage: 3 times load voltage min.
Average rectified current: 1 A
Summary of Contents for CJ - 12-2004
Page 2: ...SYSMAC CS CJ Series ID Sensor Units Operation Manual Revised December 2004...
Page 3: ...iv...
Page 11: ...xii...
Page 55: ...36 Connections and Wiring Section 3 4...
Page 69: ...50 I O Data Allocations Section 4 3...
Page 91: ...72 Data Check Section 5 7...
Page 141: ...122 Sample Programming Appendix B...
Page 147: ...128 Revision History...