Omega RD100B manual Alarms AND/OR Operation of Alarm Output Relays, Functional, Description

1.3 Alarms

AND/OR Operation of Alarm Output Relays

When multiple alarms are assigned to one alarm output relay, the condition for activating the alarm output relay can be selected from the following:

•AND: Activated when all assigned alarms are occurring simultaneously.

•OR: Activated when any of the specified alarms is occurring.

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Functional

Alarm

Alarm output relay

Channel 01

Channel 02

AND

OR

Description

The alarm output relays assigned to AND operation are specified as follows: “I01 (first relay) to Ixx (where xx is the relay number).”

The default setting is “no AND relay.”

Note

•If the reflash alarm is enabled, I01 to I03 are fixed to OR operation. Specifying AND produces no effect.

•If diagnosis output is enabled, I01 is set to diagnosis output. Specifying AND produces no effect.

<Related Topics>

Setting the AND operation: Section 7.1

Energized/De-energized Operation of Alarm Output Relays

You can select whether the alarm output relay is energized or de-energized when an alarm occurs. If de-energized is selected, the status of the alarm output relay when an alarm occurs is the same as the status that results when the power is shut down. The setting applies to all alarm output relays.

The default setting is energized.

Energize NO C NC NO C NC NO C NC

De-energize NO C NC	NO C	NC	NO C NC
When power is	When alarm is		When alarm is
shut down	not occurring		occurring

NO : Normally Opened, C : Common, NC : Normally Closed

Note

If diagnosis output is enabled, I01 is fixed to de-energized operation.

<Related Topics>

Setting the energized/de-energized operation of alarm output relays: Section 7.1

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