Chapter 6 Operating instructions
Flexi Classic
84 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8011509/YPP0/2015-10-26
Subject to change without notice
Electrical installation
• The wiring of single-channel safety outputs as well as the external device monitoring
(EDM) and ENABLE (EN) must be performed inside the control cabinet.
• External faults (e.g. cross-circuits) between two modules within a Flexi Classic system
are to be avoided through use of appropriate countermeasures (separating effected
wires, single plastic-sheathed cable etc.). For more informationen on this topic see
section 4.12 “Grouping of subsystems” on page 78.
Special features to note during wiring:
A UE410-8DI has two test pulse generators. This means that short-circuits between odd
(X1) and evenly (X2) numbered outputs will be detected. Short-circuits between two odd
(i.e. X1, X3, X5, X7) or two evenly (i.e. X2, X4, X6, X8) numbered outputs will not be de-
tected (see also section 4.12 “Grouping of subsystems” on page 78).
= Mount the reset device so that it cannot be actuated by a person located in the ha-
zardous area. When operating the reset device, the operator must have full visual
command of the hazardous area.
WARNING
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