© 2020 All rights reserved. Data subject to change without notice.
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Rev. B | 2020.11
LPT-M - Operation Manual
Wiring Example: 4-Wire VDC
5.7.2 Relay Wiring Connection
The relay operates in “failsafe” mode, i.e. the relay coil is energized under normal non-alarm
conditions. The relay is de-energized when if power fails. In most applications the relay function
should use the common “COM” and normally closed “NC” terminals. With this wiring the connection
will be open under normal, low gas concentration conditions. When the gas concentration rises to
the c
onfi gured alarm point or if there is a power failure the connection relay will close.
Wiring Example: Relay
