turck BL20-GW-CANOPEN, User Manual, Page: 70 / 95

Guidelines for Electrical Installation
D301087 1211 - BL20 CANopen 7-2
7.1 General Notes
7.1.1 General
Cables should be grouped together, for example: signal cables, data cables, heavy current cables,
power supply cables.
Heavy current cables and signal or data cables should always be routed in separate cable ducts or
bundles. Signal and data cables must always be routed as close as possible to ground potential surfaces
(for example support bars, cabinet sides etc.).
7.1.2 Cable Routing
Correct cable routing prevents or suppresses the reciprocal influencing of parallel routed cables.
7.1.3 Cable Routing Inside and Outside of Cabinets:
To ensure EMC-compatible cable routing, the cables should be grouped as follows:
Various types of cables within the groups can be routed together in bundles or in cable ducts.
Group 1:
„
shielded bus and data cables
„
shielded analog cables
„
unshielded cables for DC voltage
≤
60 V
„
unshielded cables for AC voltage
≤
25 V
Group 2:
„
unshielded cables for DC voltage > 60 V and
≤
400 V
„
unshielded cables for AC voltage > 25 V and
≤
400 V
Group 3:
„
unshielded cables for DC and AC voltages > 400 V
The following group combination can be routed only in separate bundles or separate cable ducts (no
minimum distance apart):
Group 1/Group 2
The group combinations:
Group 1/Group 3 and Group 2/Group 3
must be routed in separate cable ducts with a minimum distance of 10 cm apart. This is equally valid for
inside buildings as well as for inside and outside of switchgear cabinets.
Cable Routing Outside Buildings
Outside of buildings, cables should be routed in closed (where possible), cage-type cable ducts made
of metal. The cable duct joints must be electrically connected and the cable ducts must be earthed.
Danger
Observe all valid guidelines concerning internal and external lightning protection and
grounding specifications when routing cables outside of buildings.