3-2
Chapter 3. Wiring
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Wiring precautions
• Be sure to mount a switch for shutoff of the main power to this device within
reach of the operator. Add this switch to the wiring on the non-grounded side.
• The following table shows the meaning of the symbols printed on the main unit.
Symbol Description
DC
to AC
Caution: risk of electrical shock
Caution
Functional ground terminal (not a protective ground terminal)
• Before starting the wiring work, be sure to check the model number and terminal
numbers, comparing what is printed on the main unit with what is in this user's
manual. After wiring, be sure to check that there are no mistakes.
• The input/output signal wires should be at least 50 cm away from power lines
for motors, etc., and from other power source wiring. Also, do not put these two
types of wires in the same conduit or wiring duct.
• Be careful not to allow any crimp-type terminal lugs to touch adjacent terminals.
• Connect no more than two crimp terminals to the same terminal screw.
• Make sure that devices and equipment connected to this device have reinforced
insulation or double insulation suitable for the maximum operating voltage of
this device's power supply, inputs, and outputs.
• To satisfy the specified accuracy, allow the device to warm up for at least 30 min.
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