Mounting Onto Carrier Rail; Carrier Rail Properties - WAGO 750-8207 Manual

74 Mounting
5.3

Mounting onto Carrier Rail

5.3.1

Carrier Rail Properties

All system components can be snapped directly onto a carrier rail in accordance
with the European standard EN 50022 (DIN 35).
Do not use any third-party carrier rails without approval by WAGO!
WAGO Kontakttechnik GmbH & Co. KG supplies standardized carrier rails that
are optimal for use with the I/O system. If other carrier rails are used, then a
technical inspection and approval of the rail by WAGO Kontakttechnik GmbH &
Co. KG should take place.
Carrier rails have different mechanical and electrical properties. For the optimal
system setup on a carrier rail, certain guidelines must be observed:
• The material must be non-corrosive.
• Most components have a contact to the carrier rail to ground electro-
magnetic disturbances. In order to avoid corrosion, this tin-plated carrier rail
contact must not form a galvanic cell with the material of the carrier rail
which generates a differential voltage above 0.5 V (saline solution of 0.3 %
at 20°C).
• The carrier rail must optimally support the EMC measures integrated into
the system and the shielding of the I/O module connections.
• A sufficiently stable carrier rail should be selected and, if necessary,
several mounting points (every 20 cm) should be used in order to prevent
bending and twisting (torsion).
• The geometry of the carrier rail must not be altered in order to secure the
safe hold of the components. In particular, when shortening or mounting the
carrier rail, it must not be crushed or bent.
• The base of the I/O components extends into the profile of the carrier rail.
For carrier rails with a height of 7.5 mm, mounting points are to be riveted
under the node in the carrier rail (slotted head captive screws or blind
rivets).
• The metal springs on the bottom of the housing must have low-impedance
contact with the DIN rail (wide contact surface is possible).
Manual
Draft version 1.2.1 from 2017-09-13, valid from FW Version 02.06.20(09)
WAGO-I/O-SYSTEM 750
750-8207 PFC200 CS 2ETH RS 3G