3
Connect power cable and lines:
w
Route the power cable through the M screw fitting.
w
Connect the lines in the connection unit.
4
Tighten the M screw fitting.
Figure 18: Power connection in the evaluation unit, power supply 230V / 50 Hz
NOTICE
The PE connection must always be connected to the protective ground of the system.
6.7
Connecting the FS840 Ex overpressure control
Electrical safety
The local electrical installation regulations must be observed.
Risk of explosion
DANGER
Risk of explosion through incorrect settings for the pressurized enclosure
The pressurized enclosure is a central safety part of the device. All work is described in
this Manual and the relevant specified documents. If work is performed which is not
described in this Manual, the risk of explosion of the measuring system increases and
the ATEX certification for the device becomes void.
b
Carry out all work skillfully and in accordance with the delivered documentation.
Unsafe measuring operation
CAUTION
Risk of unsafe measuring operation through loss of degree of protection IP65
Ineffective seals of the connection unit and insufficient closed openings for unused line
inlets can lead to loss of degree of protection IP65. Penetration by dust or moisture can
lead to unsafe operation of the FS840.
b
Close off unused openings for line inlets with impact resistant sealing plugs that
have been checked against self-loosening and turning.
b
Check the seals on the Ex-e enclosure for damage and replace as necessary.
b
Tighten the terminals, especially in the Ex-e area.
b
Check the terminals for discoloration. This could indicate increased temperatures.
b
Check the gland screw fittings, sealing plugs and flanges for leak tightness and
tight seat.
6
ELECTRICAL INSTALLATION
42
O P E R A T I N G I N S T R U C T I O N S | GM700 Ex
8019532/100Q/V1-1/2018-08 | SICK
Subject to change without notice