Omron G3ZA - MANUAL 2 User Manual page 29

How To Use the Terminals
Wiring Diagrams
Wiring Precautions
Control Power Supply
(Terminals 1 and 2)
19 20 21 22 23 24
13 14 15 16 17 18
READY
SD/RD
OCC
ERROR
8 9 11
7
1 2 4
Load Power Supply Input
(Terminals 4 and 6)
19 20 21 22 23 24
13
14 15 16 17 18
READY
SD/RD
OCC
ERROR
7 8 9 11
1 2 4
RS-485 Communications
(Terminals 7 and 8)
19 20 21 22 23 24
13 14 15 16 17 18
READY
SD/RD
OCC
ERROR
7 8 9 11
1 2 4
12
• To avoid the effects of noise, wire signal lines separately from power lines.
• Use cables with wires that have sufficient capacity.
• Attach solderless crimp terminals on wires that connect to the terminal
block.
• Use one of the following M3 solderless terminals for wiring.
Use wires that are rated to withstand 70 ° C minimum.
In the wiring diagrams, the area within the lines indicating terminals numbers
is inside the G3ZA and the area outside the lines are outside the G3ZA.
• Connect terminals 1 and 2 as follows:
1 2
• The input power is 100 to 240 VAC.
6
• To detect the zero-cross point of the load supply, connect the load power
supply to terminals 4 and 6 as follows:
4 6
The voltage of the load power supply that can be connected depends on
the model of the Controller.
100 to 240 VAC or 400 to 480 VAC
6
• The G3ZA detects the zero cross point of the load power supply.
• Use a load power supply with the same phase as the G3ZA Controller's
input power supply.
• The system will not be controlled correctly if the control power supply is
phase-controlled or has a different frequency from the input power supply.
• To communicate with a host system, connect the communications line to
terminals 7 and 8 as follows:
7 8
B A
(+) (- )
RS-485
• The connection type can be 1: 1 or 1: N. For 1: N connections, up to 32
Units can be connected, including the host.
6
• The maximum cable length is 500 m total.
5.8 mm max.
5.8 mm max.
Section 2-2