Operating Instructions
ON Series m UPS User Instruction Manual
11
inverter. If blinking, it indicates no battery, overload
or high line and no battery present.
Communications
(Factory Installed
Options)
The isolated Basic Interface Option will send On
Battery and Low Battery signals to the host
computer. It will also accept a shutdown signal to
turn the inverter off to conserve battery life.
Pins 1 and 10 (simulated relay closures) are open
collector transistor outputs which must be pulled up
to a common reference supply no greater than +15V
DC. They are opto-isolated open collector transistors
capable of a maximum noninductive load of 10mA
DC. Pin 11 is the common for all of the relay closure
pins and is isolated from the UPS chassis ground.
Pins 20 and 21 are used to shut down the UPS when
it is operating on battery. A positive signal (3 to 24V
DC) on pin 20 with respect to pin 21 shuts down the
UPS. A signal at or below ground allows the UPS to
keep running.
Table 2. System Code Status Chart
Power Battery
Fault
Unit Status
O
O
O
OFF
●
O
O
ON/AC Present
●
❋
❋
ON AC/No Battery
●
❋
O
ON AC/Battery Charging
●
❋
●
ON AC/Replace Battery
❋
O
❋
ON AC/Overload
❋
●
O
ON Battery Power
❋
❋
O
ON Battery/Battery Low
O
O
❋
Off/Overload
O
●
●
Off/No AC - Fault
O
O
●
Off/Unit Fault
O = Off,
●
= On,
❋
= Blinking
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