Murphy EVS-2 Spécifications télécharger pdf (Page 20)

Section 20 00-02-2003

06-21-10 - 16 -

Configuring Latching and Non-Latching/Fail-safe and Normal Modes

The alarm relays can be configured to operate in a latching or non-latching mode, Fail-safe or

Normal mode.

Latching Mode – When an alarm or shutdown condition is reached, the output

remains in the alarm condition until it is reset.

Non-Latching Mode – The output is automatically reset when the alarm condition no

longer exists.

Fail-safe Mode – Should a loss of power occur, when in fail-safe mode the switch

reverses the relay settings.

Normal Mode – In Normal mode when a power loss occurs, the relays remain in the

states indicated in the diagram below. Normal does not reverse the relay

settings.

NOTE: To differentiate between the “Failsafe” and “Normal” settings on the switch plate, the

teal colored settings indicate failsafe and black settings indicate normal.

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Murphy EVS-2 Spécifications Page 20