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© 2020 All rights reserved. Data subject to change without notice.
LPT-M - Operation Manual
Rev. B | 2020.11
6.9 Relay Operation
The LPT-M has one dry contact relay that are designed to operate fans or to control equipment that
draws no more than 3 volts, 2 amps max at start-up and / or operational current. The system does
not provide any power from these terminals. Dry contacts operate like a switch to simply activate
(switch on) or de-activ
ate (switch off ) equipment to be controlled, such as fan starters.
The relay is SPDT (single pole, double throw) thereby providing one set of usable dry contacts for
the relay. Because the LPT-M system is designed to be fail-safe, any equipment to be controlled by
the system relay should be wired to the “NC” (Normally closed) and “COM” (Common) terminals.
The relay coils are normally energized in non-alarm state for failsafe operation.
6.9.1 Enable / Disable Relay
The relay in the LPT-M can be enabled or disabled. The factory default for the relay setting is
enabled. If the relay is disabled it will not be able to be controlled by the BAS / DDC.
In the Har
dware Confi guration Menu (passcode 1001), press either ARROW to scroll through the
menu and select Program Relay. Press ENTER to select.
Scroll through the menu and choose Relay Enable. Press ENTER to choose between ON or OFF.
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