Manual

Auxiliary Output Functions
975-0560-01-01 Revision B 1–9
Auxiliary Output Functions
The charge controller has a set of auxiliary relay contacts—one normally opened
(NO) and one normally closed (NC)—that can be used to drive a relay for load
control or to turn on devices such as vent fans or indicator alarms. The auxiliary
output can be configured to trigger under only one condition at a time. See
“Configuring the Auxiliary Output” on page 2–8 for information about auxiliary
output trigger sources and how to enable and configure the auxiliary output for
your application.
Load Control The charge controller’s auxiliary output can be configured to disconnect or
reconnect loads depending on battery voltage. This load control function
enables the charge controller to help prevent damage to the battery from over-
discharge during periods of poor charging (due to ambient temperature, for
example) or excessive loads.
Vent Fan The charge controller’s auxiliary output can be configured to trigger a small DC
fan to clear a battery compartment of harmful gases. The charge controller’s
auxiliary output must be configured to activate when flooded batteries reach their
gassing voltage.
Alarms The auxiliary output can be configured to trigger an alarm or indicator light when
a pre-set condition occurs, such as low or high battery voltage, high PV array
voltage, or a charge controller error condition.