4-2
Chapter 4. Wiring
Symbols used in the terminal wiring label
The following table shows the meaning of the symbols used in the terminal wiring
label on the side of the device.
Symbol Description
∼
AC
DC
Caution: risk of
electrical shock
Caution
Wiring precautions
Pay attention to the following when wiring this device.
• Before wiring this device, verify its model No. and terminal Nos., which are
written on the wiring diagram on the side of the device.
• Wire the power lines separately from input/output signal lines.
Keep them at least 50 cm away from each other.
Do not pass these two types of wiring through the same conduit or wiring duct.
• Do not use any terminals as relay terminals.
• Fasten to the correct tightening torque.
• Be careful not to allow crimp terminals to touch adjacent
terminals.
• Connect no more than two crimp terminal lugs to the same terminal screw.
Bend the crimp terminal lugs in advance.
• Use crimp terminal lugs compatible with M3 screws.
Recommended crimp terminal lug:
V1.25-MS3, manufactured by J.S.T. Mfg. Co., Ltd.
max.
• To separately turn the power supply of this device on and off in instrumentation
where current signals are input to multiple devices (including this device)
connected in series, use the separately sold resistor (model No. 81401325) and
set the range type to voltage.
• Connect a terminating resistor (120 Ω) to both ends of the RS-485 transmission
line.
However, if terminal resistance is not specified for other devices connected
to the same transmission line, do not connect the resistor. If they do specify a
resistor, use the highest resistance value specified, at least 120 Ω.
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