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8008250/1F7Y/V4-0/2022-06 | SICK
O P E R A T I N G I N S T R U C T I O N S | GM901
Subject to change without notice
6
ELECTRICAL INSTALLATION
6
Electrical installation
6.1
Project planning
The customer must carry out the installation and final wiring on-site if not otherwise agreed
with SICK.
Important information
●
The standard version of the GM901 has one single purge air unit. For high duct
overpressure (> 10 mbar), a more powerful fan or one purge air unit each for the sender
and receiver can be used divergent from the standard version.
●
A large range of purge air motors with varying performance and different power
connections are available. Before starting installation, check the versions and number of
purge air units delivered and change circuit planning accordingly!
●
The power connection for the control unit and purge air motor must be fixed on-site.
●
Install and secure a separate power supply for the control unit and for the purge air unit.
●
Install a dedicated power circuit breaker switch, with a motor circuit breaker when
possible, for the purge air unit in the vicinity of the measuring devices.
●
Position a clearly visible warning sign to secure the switch against unintentional switch-
off.
●
A protective phase failure switch is recommended for 3-phase motors.
Electrical protection
●
Accessories: Control unit of GM901
To be provided by the customer on-site:
●
The main power supply for the GM901 as well as for the purge air unit (3-phase)
●
Signal cable according to task definition
●
PE conductor for the connection on the outside of the control unit (to comply with the
EMC regulations)
Insulation:
Protection class 1 in accordance with EN 61140
Insulation coordination:
Overvoltage category II in accordance with DIN EN 61010-1
Contamination:
Degree of contamination II in accordance with DIN EN 61010-1
