6.9
Preparing the power supply
CAUTION
Prevent accidentally switching off the purge air supply
Accidentally switching off the purge air supply can cause the measuring system to con‐
taminate and overheat.
b
Attach a clearly visible warning against accidentally switching off the separation
equipment for the purge air unit.
1
Check that the connection lines meet the requirements:
–
Cross-section: 3 x 1.5 mm
2
–
Temperature class: -40 ... +85 °C
2
Provide a separate external disconnecting device for:
–
Connection unit (max. power input,
).
–
Purge air units (see Technical Data of purge air unit).
–
Mark the disconnecting device as disconnecting device for the GM32 Ex.
3
For category 3G
w
Route the power cable through the M screw fitting.
w
Connect the lines in the connection unit.
4
Tighten the M screw fitting.
1
Figure 21: Power connection in connection unit for version 3G
1
Power supply 100 ... 230 V / 50 .. 60 Hz
NOTE
Power connection in connection unit for version 2G,
see "Connecting the Ex peripherals
.
NOTICE
Always connect a protective conductor to PE.
ELECTRICAL INSTALLATION
6
8015558/YYJ8/V1.7/2016-07 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM32-Ex
47
Subject to change without notice