6 Contact signal functions
6-1 Contact signal I/O details
BL50T/BL75T/BL100T
67
6
6-1-2 Types of signal inputs
The UPS has the following two types of signal inputs.
Signals
Descriptions
Backup Power Supply Stop
Signal (BS) input
When the BS signal is turned ON (High), after the
pre-set time elapses, stops the output of the UPS
(Note 1).
Remote ON/OFF signal
Runs or stops the UPS according to the status of
the contact connected to outside or the ON/OFF
status of the open collector circuit. Operates the
UPS when the status is OFF, and stops the UPS
when the status is ON.
By factory default, stops operation when a short
circuit occurs.
Note that to use this function, it is necessary to
have the "Power" switch of the UPS turned on
(Note 2).
Note 1: For the BS signal and the stop of the UPS output, when a voltage signal
continuing for 10 seconds or longer (High) is input during backup operation, the
output of the UPS stops. The time from reception of the BS signal to the stop of the
output can be set (refer to "3-5-2 Setting method" (P.56).
Note 2: There are two connection terminals: one at pin numbers 6-7 of the contact signal
I/O port and the other at the remote ON/OFF dedicated port. Use one of them
according to usage.
6-1-3 Contact Signal I/O port (DSUB9P female)
Pin assignment
Pin number
Name
Front view
Screw size: Inch screw
thread
#4-40UNC
1
Low Battery Level Signal output (BL)
2
Trouble Signal output (TR)
3
Backup Power Supply Stop Signal
input (BS)
4
NC
5
COMMON (COM)
6
Remote ON/OFF input (-)
7
Remote ON/OFF input (+)
8
Backup Signal output (BU)
9
Battery Replacement Signal output
(WB)
※
To fix a connector screw at the contact signal I/O port, manually tighten the screw
without using an electric screwdriver.
