<Start-up and Safety Precautions>
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IM 11M12G01-01Z1
1st Edition : Mar. 08, 2021-00
1.2.2 Wiring
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Preparation
Power supply, relay contact, and heater power should be connected first. Those terminals are
behind the shield cover. Next, connect the others. For details, refer to the User’s Manual IM
11M12G01-02EN. Read it carefully before wiring.This manual describes how to use the ZR802G
with Yokogawa’s sensors. Please read carefully this manual and the instruction manuals relevant
to those sensors you use before using this instrument.
WARNING
• Cables that withstand temperatures of at least 80 °C should be used for wiring.
• Wiring work should be performed to meet IP66 or higher requirements.
• Use cables that comply with UL2556VW-1 or equivalent.
• Always place the shield cover over the power supply and contact terminals for safety
reasons and to avoid interference.
Shield
cover
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Cables, Terminals, glands and conduit adapter
The ZR802G is supplied with terminals suitable for the connection of finished wires in the size
range of 0.13 to 2.5 sq.mm. (26 to 14 AWG). The cable glands supplied will form a tight seal on
cables with an outside diameter of 6 to 12 mm (0.24 to 0.47 inches). Unused cable entry holes
must be sealed with cable glands including the close up plugs supplied.
For details, refer to the User’s Manual IM 11M12G01-02EN.
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Wiring the power supply
CAUTION
Make sure the power supply is switched off. Power rating must comply with ZR802G
specification. Power voltage must match with the one indicated on the name plate.
WARNING
● You must install external power supply switch or circuit breaker for power supply.
● The external power supply switch or a circuit breaker must comply with a current rating of 5A
or IEC60947-1 or IEC60947-3
● Yokogawa recommend installing the external power supply switch, circuit breaker and
ZR802G converter all in the same location.
● Install the external power supply switch or circuit breaker to the place where operators
access easily. To alert users, put a label on the external power switch.
● Wire cables of power supply, contact output securely with cable rack, conduit and vinyl
band. Unplugged cables are dangerous and may cause an electric shock.