Alpha Technologies Micro Secure UPS - Manual (Page 42)

017-220-J0 Rev B
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Figure 22 — UPS Maintenance: Relay & Load Shed screen
Controlling the external fan by temperature triggered dry contact
The Alpha Micro Secure has up to 6 dry contacts (C1 to C6) on the front panel which can be configured by the
user to open or close based on the specific trigger conditions. Dry contact functions currently available include:
Alarm, Fault, Timer, Low Battery, On Battery, etc. The Temperature trigger has been added as a new function,
with a user configurable range of +20°C to +55°C. When the battery temperature (monitored by the Battery Tem-
perature Probe) reaches the threshold, the assigned relay closes and turns on the external fan.
Dry contact C6 is by default factory hard wired to External Vdc. To configure C6 as a programmable dry contact,
the unit must be sent back to the factory.
The Temperature trigger can be programmed via one of the following 3 interfaces:
1. LCD panel – from the Logo screen, navigate to Control Menu > RELAY TEMP. Press the SELECT button
and the current temperature display will start flashing. Use the Scroll button to change the temperature in
5°C increments. Press SELECT to accept the changes or CANCEL to abort.
120/60/N
LINE
RELAY TEMP
55
Relay & Load Shed
Is used to configure the front panel’s dry contact to provide a signal for turning off the load.