SICK GMS840, Addendum To Operating Instructions

21

8018429/1DWP/V3-0/2022-06| SICK

A D D E N D U M  T O  O P E R A T I N G  I N S T R U C T I O N S  | GMS840

Subject to change without notice

INSTALLATION

3

3.7.2

Installation information

Cable installation

▸

Connect each signal cable for intrinsically safe signal connections to one built-in 
additional module, 

see “Safety barriers”, page 20

.

▸

Install the signal cables in compliance with EN 60079-11 (“Explosive Atmospheres - 
Part 11: Equipment protection by intrinsic safety “i””).

▸

Maintain electronic limit values, 

see “Limit values for intrinsically safe signal 

connections”, page 21

.

▸

Install all components of a signal circuit intrinsically safe. 

3.7.3

Limit values for intrinsically safe signal connections

Intrinsic safety of the connected intrinsically safe signal circuit is only ensured when the 
power circuit, including cables, maintains the limit values specified below. 

3.8

Closing the enclosure tight

NOTE:

Execute cable installation according to EN 60079-14.

WARNING: Risk of explosion

Intrinsically safe installations must maintain a certain clearance from other electrical 
equipment (specifications see EN 60079-11).

▸

Install cables of “intrinsic safety” circuits in such a way that the required distance to 
other electrical devices is always maintained.

CAUTION: Lower limit values could possibly be applicable

Lower limit values could be applicable for the individual application case. The 
composition of the potentially explosive atmosphere is decisive here.

▸

Determine the highest allowable limit values for the individual application case using 
the European standard EN 60079-0 “Explosive atmospheres. Equipment. General 
requirements”.

▸

If this results in limitations:

 Note these limitations (e.g. in this document) and 

consider during installation.

●

Limit values for intrinsically safe analog outputs, 

see “Limit values for intrinsically 

safe analog outputs”, page 32

.

●

Limit values for intrinsically safe digital inputs and digital outputs, 

see “Limit values 

for intrinsically safe digital outputs”, page 32

.

Observe the following in order to maintain the IP66 qualification of the enclosure:

●

The sealing surfaces must have complete, undamaged and full surface contact.

●

Tighten the screws to the stop.

●

Check the state of the cable glands for completeness and functionality.

●

Close unused connections with the dummy plugs provided.