AMETEK GUPS 2400A-107 - Manual (Page 21)

Operation
GUPS 2400A
–107 Operation Manual
3-3
3.2.2 Pushbutton Switches
OUTPUT ON
A momentary pushbutton switch on the front panel that alternately turns the output power on
and off.
TEST
A momentary push button switch on the front panel that initiates the internal self-test.
ALARM SILENCE
A momentary pushbutton switch on the front panel that silences the audible alarm.
3.3 Circuit Breaker
The AC input breaker is located on the front panel below the Control and Indicator Panel.
It is turned ON by pushing in the actuator button, and it is turned OFF by pulling out the
actuator button.
3.4 Audible Alarm
An audible alarm is sounded for the following alarm conditions: loss of AC input; low battery
voltage; over-temperature. If the audible alarm is silenced and an alarm condition is again
present, the audible alarm will again be sounded.
3.5 Control Signals
The Data/Alarm Port provides an interface to remote alarms or a host computer. The control
signals provide annunciation of the mode of operation, control of the system shutdown, and RS-
232 data communications. The control signals of the Data/Alarm Port and their signal return
could be floated up to 80VPK above chassis ground.
AC FAIL
Normally-open relay contacts that close when the AC input is outside the allowed range for
voltage or phase unbalance.
LOW BATTERY
Normally-open relay contacts that close when the battery voltage approaches the shutdown
threshold for the inverter.
SHUTDOWN
Input to a relay coil whose contacts interface with the control circuits of the GUPS. Energizing
the relay with a DC voltage, 16.8-36VDC (1,070 ±10% coil resistance), will result in shutdown.
If SHUTDOWN is asserted while the AC input is present, the output relay will open and output
power will be turned off; the inverter and control circuits will continue to operate.