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Hydran* M2-X Instruction Manual

MA-029 Rev. 1.0, 30-Jul-18

6.5.3.1 Normal Mode

In this mode, the relay state changes if an alarm condition is detected for a

period of time exceeding the corresponding alarm delay; the relay returns to its

former state when the alarm condition disappears for a period of time exceeding the

same alarm delay. The Normal mode is the default setting.

6.5.3.2 Latch Mode

In this mode, the relay state changes if an alarm condition is detected for a

period of time greater than the corresponding alarm delay; the relay returns to its

former state when the alarm condition disappears for a period of time greater than

the same alarm delay and if the alarm has been acknowledged by the user (using the

Hydran M2-X’s keypad or using Perception software).

6.5.3.3 Normal and Latch Modes

In the Normal and Latch modes:

• Alarm relays 1 to 4 are energized when an alarm condition is detected.

• The system fault relay 5, however, is de-energized when an alarm condition is

detected. The system fault relay is thus energized (NO contacts closed and NC

contacts open) if there is no alarm condition.

6.5.3.4 Force Off Mode

In this mode, the relay does not respond to changes in alarm conditions; the

relay’s power always remains off. This mode is used mainly to test the alarm relays

or disable an alarm circuit.

6.5.3.5 Force On Mode

In this mode, the relay does not respond to changes in alarm conditions; the

relay’s power always remains on. This mode is used mainly to test the alarm relays

or disable an alarm circuit.

GE Hydran M2-X User Manual

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