GE Hydran M2-X - States of Alarm Relays; Operation Modes of the Alarm Relays

Hydran* M2-X Instruction Manual
Page 118
MA-029 Rev. 1.0, 30-Jul-18
6.5.2 States of Alarm Relays
Relays can only be in two states: On (coil energized) or Off (coil de-energized).
Table 6-10 lists the possible states of all relays.
AC Power
Alarm
Relays
TDM Signal
1 or 2
3 or 4
Fault
a
OK
None
Off
Off
On
Normal
OK
Alarm 1 or 2
On
Off
On
High or High-High
OK
Alarm 3 or 4
Off
On
On
-
OK
System fault
-
-
Off
System fault
Out
-
Off
Off
Off
System fault
Table 6-10: Possible States of All Relays
a. On = normal (no alarm); Off = alarm
The state of each relay can be determined as follows:
• By displaying each relay state on the Hydran M2-X’s display.
• By verifying the state of the alarm contacts on the corresponding terminal block.
6.5.3 Operation Modes of the Alarm Relays
The mode of each alarm relay is set using the corresponding Relay #x Mode
parameter in Setup > Relay Setup > Relay Test There are four operation modes:
• Normal
• Latch
• Force On
• Force Off
The Hydran M2-X’s five alarm relays are independent. A relay can therefore be
set to any operation mode regardless of the mode of the other relays.