6 Contact signal
6-1 Contact signal
BU5002R/BU3002R/BU3002RH
116
6-1-2 Signal output
The UPS has 4 types of signal output. The output circuit is an open collector circuit (a type
of electronic switch) using a photocoupler.
● Backup signal output (BU)
It becomes ON continuously during a
power outage.
BU-COM
ON during a power
outage
● Low battery level signal output (BL)
It goes ON when the battery becomes
weak during backup operation.
BL-COM
ON when the
battery is low
● Trouble signal output (TR)
It goes ON when a problem occurs with the
UPS.
TR-COM
ON during a fault
● Battery replacement signal output (WB)
It goes ON when the test determines that
battery replacement is necessary due to
deterioration or when the battery life
counter reaches the end of count value.
WB-COM
ON when battery
replacement is
required
6-1-3 Signal input
● Input of the UPS stop signal (BS)
BS-COM
UPS stops
When the BS signal is ON (High), the output of the UPS is stopped after a period of time
set in advance has passed. The following settings are available on the LCD.
(1) BS valid range: [3.Settings] - [Dry Contact] - [BSsignal ValidRange]
• Always enabled: The BS signal is received either in normal mode or backup mode.
• Enabled during backup mode: The BS signal can be received only in backup
operation.
(Note) Input the ‘BS signal’ after a change of backup signal (BU) or low battery level
signal (BL) has been received.
(2) BS signal delay time [3.Settings] - [Dry Contact] - [BSsignal Delay Time]
An interval between receive of the BS signal and stop of the UPS output can be set.
●
Backup signal output (BU)
The UPS can be operated or stopped in accordance with
an externally connected contact point or the ON/OFF
status of an open contact circuit.
The connection terminal has contact signal input output
connector pin numbers 6-7.
External
contact
point
Oper
ation
Open
Oper
ates
Closed
Stops
