Contact Signal - Omron BU2002RWL Instruction Manual

7
. Using the UPS monitoring software and contact signal
7-4

Contact signal

Contact signals are included as standard for the unit.
Contact Signal
You can develop your unique system based on the following specifications to automate the process
at a power failure. You can perform power-failure processing by allowing the system to detect the
backup signal and also perform system shutdown processing by allowing the system to detect the
Low battery level signal. Also, by inputting the backup stop signal from the system, you can stop the
UPS with a sufficient battery level to prepare for the next occurrence of a power failure.
7-4-1. Signal output
The UPS has 4 kinds of output signals. The output circuit consists of an open collector circuit using
a photo coupler (a kind of electronic switch).
● Backup Signal output: BU
Stays ON during backup operation at a power
failure.
● Low battery level signal output: BL
Goes ON when the battery becomes weak
during backup operation at a power failure.
● Trouble Signal output: TR
Goes ON when a failure of the UPS occurs or
when the battery life counter
expires.
● Battery Replacement Signal output (WB)
Goes ON when the test determines that bat-
tery replacement is necessary due to deterio-
ration or when the battery life counter goes
off-scale.
7-4-2. Signal input
● Input of the UPS Stop Signal (BS)
When the BS signal is ON (High), the output of the UPS is stopped after the time period specified
in advance has elapsed. The following settings are available on the LCD.
(1) BS Valid Range: "Settings" - "Dry Contact" - "BS Valid Range"
• Always enabled
• Enabled during Battery Mode: The BS signal is received only in Battery Mode.
(2) BS Delay Time: "Settings" - "Dry Contact" - "BS Delay Time"
You can set the amount of time between when the BS signal is received and when the output
of the UPS is stopped.
● Remote ON/OFF Signal
Remote ON/OFF signals can be used to start
and stop the UPS, by using either an externally
connected contact or the ON/OFF status of the
open collector circuit.
Connection terminals are at contact signal con-
nector pins 6 ,7.
43
BU-COM
BL-COM
TR-COM
WB-COM
BS-COM
: The BS signal is received either in Commercial Power Mode
or Battery Mode.
ON when a power failure occurs
ON when the battery is low
ON when a power failure occurs
ON when replacing the battery
UPS stops
External contact Operate
Open
Close
Start
Stop