Yokogawa Standalone MW100 - Manual (Page 97)

2-9 IM MW100-01E
Installation and W
iring
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App
Index
2.4 Connecting Signal Wires
General Precautions When Wiring the Input/Output Signal Wires
WARNING
• To prevent the possibility of electric shock when wiring, confirm that the power
supply source and signal source are turned OFF. After making the connections,
secure the terminal cover and do not touch the terminals with your hands.
• For signal wires on which voltage exceeding 30 VAC / 60 VDC is applied relative
to the ground potential or between signals, use reinforced (double) insulation
wires. For all other signal wires, use basic insulation wires. For the withstand
voltage of insulation wires, see the table below.
Applied Voltage (Vrms or VDC) Basic Insulation Double (reinforced) insulation
30 (60 VDC) to 100 620 Vrms 1000 Vrms
101 to 150 840 Vrms 1400 Vrms
151 to 300 1390 Vrms 2300 Vrms
301 to 600 2210 Vrms 3700 Vrms
• To avoid electric shock when removing the terminal plate or block and wiring the
terminals, attach the terminal block or plate to the input output module before
inputting or outputting signals. Electric shock or fire can result if signals are
applied to the terminals if the terminal block is removed from the input/output
modules.
• When wiring to screw terminals, use round, insulation coated crimp-on lugs on
the terminals (4 mm screws on the screw terminal block, and 3 mm screws on
the screw terminals and screw terminal plate) that do not come out when loose.
• To prevent fire, use signal wires of the following temperature ratings.
Module Type Temp. Rating
Screw terminal block 75°C
Universal input module, DCV/TC/DI input module, 4-wire RTD 80°C
resistance input module, Strain input module, Pulse input module,
Digital input module, Digital output module
Analog output module, PWM output module
85°C