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Mounting the Base Module Markers and Wiring Markers
Colour of wiring marker
Black
Red
Blue
Red/Blue
Yellow/Green
Green
Brown
MELSEC ST Series
Base module
marker
Base module
Wiring marker
Base module
Meaning
Signal wires
Positive pole of a DC voltage (24 V DC, 5 V DC)
Positive pole of a DC voltage (24 V DC, 5 V DC)
N conductor of an AC voltage
System power supply
Protective earth
Shield
Phase of an AC voltage (L1)
Place the base module markers in the
apertures provided underneath the connec-
tion for an electronics module.
The wiring is identified and diagnostics are
simplified with the colored wiring markers.
Color coding is listed in the following table.
Plug each wiring marker in the slots under-
neath the terminals.
Installation
33
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