QP-748MI User Manual
Version 1.0
7
W
IRING
F
AULT
A
LARM
1.
Insert the wires into the left two contacts of the 4-contact terminal
block (Fault Alarm Relay).
2.
Tighten the screws to prevent the wires from loosening.
3.
The relay will detect the power and link failure.
4.
Users can connect the relay to an alarm and buzzer so that when
the relay forms an open circuit, the users will be notified.
W
IRING
D
IGITAL
I
NPUTS
1.
Insert the positive and negative wires into the right two contacts
(+,-) of the 4-contact terminal block (DI).
2.
Tighten the screws to prevent the wires from loosening.
3.
The system will detect the voltage go through the DI.
▪
+13 to +30V for state "1"
▪
-30 to +3V for state "0"
▪
Max. input current: 8mA
D
OUBLE
-S
ECURE
P
OWER
I
NPUT
F
AULT
A
LARM
The power inputs are designed as a "
common
negative
", which implies that the negative input is
connected, but "
double-secure
" is supported to
prevent the unnotified failure of power from one of the
negative inputs. If one of the negative power input
fails, the system will detect it and the system will
trigger the event if the users set the fault alarm or
event log for powers.
