52
8024493/AE00/V1-0/2020-09| SICK
O P E R A T I N G I N S T R U C T I O N S | DUSTHUNTER SP100 Ex-2K
Subject to change without notice
7
ELECTRICAL INSTALLATION
7.3
Information on connection lines
Line requirements in the safe area (no explosion protection zone)
For the signal lines with low voltage limits, only use shielded lines with twisted pairs (e.g.,
UNITRONIC LiYCY (TP) Li2YCY 2 x 2 x 0.5 mm² from LAPPKabel; 1 pair of wires for RS 485,
1 pair of wires for power supply; not suitable for underground laying). Lines with other
designations but equivalent construction and comparable or higher electrical properties
are permissible.
Line requirements in the explosion protection zone
●
The documentation for zone division according EN 60079-10 must be available.
●
The lines to be used must be checked for suitability for the application area.
●
After installation, an initial test of the device and the system according to EN 60079-17
must be performed.
●
Potential equalization and line connections must fulfill the requirements according to
EN 60079-14.
●
Lines which are especially endangered by thermal, mechanical or chemical stress, must
be protected, e.g., by laying in protective tubes open at both ends.
●
For lines not protected against smoldering, the fire behavior must be verified according
to IEC 60332-1.
●
The cross-section of each individual wire must not be smaller than 0.5 mm².
●
When selecting the lines, the respective clamping range of the line duct described here
must be observed. If you need more than one line duct or line ducts with different
diameters, a set can be found in the spare parts (
see “Spare parts, MCUDH Ex-3K con-
).
●
The inserted lines must be routed to the designated terminals by the shortest possible
route and fixed inside the enclosure in order to maintain the air and creepage distances
of the existing circuits.
●
Ex cable glands must be suitable for the intended cable type (e.g., lines with or without
shield).
●
Protect the wire ends with connector sleeves against fraying.
●
Replace unused line inlets with the enclosed Ex-e sealing plugs.
●
Unused wires must be connected with a ground line (ground potential) or secured so
that a short circuit with other conductive parts is excluded.
●
Torque for tightening the line glands with sealing plugs: 5 Nm, for line glands with
inserted line: 10 Nm.
DANGER:
Risk of explosion through unsuitable screw fittings and electric lines
▸
Use only suitable cables (according to valid standard) with matching outside
diameter.
▸
Protect lines against electrostatic charges.
▸
Only open those line inlets to be used for the installation. Keep the screw plugs.
▸
Refit the original screw plugs when a line inlet has to be closed again.