Wiring - Omron SYSMAC C200H Installation Manual

Wiring

6-4 Wiring
C200H-CPU21-E/CPU31-E
C200H-PS221
AC Power Supply Wiring
! Caution
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The PC ignores all momentary power failures if the interruption lasts no longer
than 10 ms. If the interruption lasts between 10 and 25 ms, the interruption may
or may not be detected. If the supply voltage drops below 85% of the rated volt-
age for longer that 25 ms (less for the DC Power Supply), the PC will stop operat-
ing and the external outputs will be automatically turned OFF. Operation is re-
sumed automatically when the voltage is restored to more than 85% of the rated
value.
The following diagrams show the proper way to connect the power source to the
PC. The terminals marked "NC" are not connected internally.
Screw (3.5 mm head with
self-raising pressure plate)
Voltage selector
Short: 100 to 120 VAC
Open: 200 to 240 VAC
Short-circuit these termi-
nals with the shorting
bracket supplied as an
accessory to select 100
to 120 VAC supply volt-
age. For 200 to 240 VAC
leave them open.
Screw (3.5 mm head with
self-raising pressure plate)
Voltage selector
Short: 100 to 120 VAC
Open: 200 to 240 VAC
Short-circuit these terminals
with the shorting bracket
supplied as an accessory to
select 100 to 120 VAC supply
voltage. For 200 to 240 VAC,
leave them open.
2
Use 1.25-mm cables or larger. The terminal blocks have screws with 3.5-mm
diameter heads and self-raising pressure plates. For connecting to the terminal
blocks, use round crimp terminals for 3.5-mm diameter heads. Directly connect-
ing stranded wires to the terminal blocks may cause a short-circuit.
Tighten the AC Power Supply terminals on the terminal blocks to the torque of
0.8 N S m. Insufficient tightening may cause short-circuiting, malfunction, or
burning.
Breaker
1:1 isolation
transformer
Isolation transformer
•
Noise between the PC
and ground can be sig-
nificantly reduced by
connecting a 1-to-1 iso-
lation transformer. Do
not ground the second-
ary coil of the transform-
er.
Power line
•
Use AWG 14 twisted pair cable
(cross-sectional area of 2 mm
Section 6-4
AC power source
•
Supply 100 to 120
or 200 to 240 VAC
•
Keep voltage fluc-
tuations within the
specified range (re-
fer to Appendix B
Specifications)
2
min).
61