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Technical alterations reserved
EN
9.2.1 Wiring to the Fault (Not OK) Relay
The Fault relay is ‘Normally Energized’. The relay is labelled NC for Normally Closed, ARM for
Armature, and NO for Normally Opened. These labels indicate the position of the armature when
there is no power applied to the rack (i.e. ARM will be connected to NC.).
The Fault (Not OK) relay is a single-pole, double-throw (form C) relay. Use 12 to 24 AWG wire
(0.2 mm
2
to 4 mm
2
).
Specifications for the fault relay current and voltage ratings are found in the RCM datasheet
(S1078950).
Figure 9-8) Fault Relay Diagram
High voltages (powered by external systems) may be present on relay wiring. Verify
external voltages with a multi-meter before servicing relay connections
Higher contact potentials cause current levels which are extremely dangerous and can lead to
injury or even death!
The permissible levels of contact potentials are:
• Max. 50 Volts in the case of AC voltages.
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