33
October 2010
AUTOMATIKPRODUKTER
AUTOMATIKPRODUKTER
ATEX – Duct Smoke Detector
Cable installation
For the low voltages any conventional communication cables with or without
shielding may be used. The diameter of the conductor must be selected in
accordance with the current consumption of the used devices and in compliance
with the length of conductors.
–
Cable diameters max. 9 mm
–
Recommended conductor type IY(ST)Y 4 x 2 x 0.8 mm
–
Only conductors with the same cross section may be wired to the same
terminal.
–
The conductors must be installed such that sufficient traction relief is
ensured.
–
The cables must be selected together with the owner/operator on the basis of
their required properties suitable for ex-atmosphere requirements.
Load capacities of contacts
Safety notes:
Safety-relevant shut-down / control of the system must be performed via the
relay contact of the ORS 142 Ex interface, terminals 4 and 5. The operation
and information statuses that are transmitted e.g. to the smoke switch
status indication RZA 142 via communication interface (terminal 3) and are
used for comfortable display / information and transmission to the central
building control system GLT.
Caution:
The electrical limit values for load capacity of the relay contacts (30 V DC/1
A or 30 V AC/1 A) must not be exceeded, not even for short periods. Conse-
quently, suitable measures for protection of the contacts must be taken.
