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Alarm contact
・Alarm contacts shall be used only for external buzzer and alarm light, and do not use it for the
controlling use (such as solenoid valve control etc).
When control the external load, the bad influence may be given to the system according to the load characteristics.
In such case, the following countermeasure shall be taken to stabilize the action and protect the contents.
・Relay(make contact amplification) by the low voltage relay and operate by connecting CR circuit (Spark Killer: SK)
(Diode etc for DC) suited for relay coil directly to relay.
・Add CR circuit to the load side of relay on the request.
CAUTION
（FOR USE OF NORMALY-CLOSED CONTACT）
Normally-closed contact (Break contact) at de-energized condition may change to open contact in a
moment due to physical shock.
Whenever alarm signals from gas detectors are used with normally-closed contact, please put
delayed-circuit (for about one second) to receiver side of normally-closed contact to avoid
such phenomenon.
