1
VG-6728 Pulse Interface Installation Manual
(Ver1.2, Sep. 2020)
I
Overview
II
VG-6728 Digital Pulse Interface is designed to monitor and drive a fire-fighting equipment,
when received an order from FD&A control unit. Its principle and application is generally similar
to VG-6727 Digital Control Interface. The only difference is utilizing Pulse-drive method on
detachable equipment, such as Fire Valve, Solenoid Valve, Exhaust Fan, etc. This interface is
designed with dual-capacitors inside to provide instant energy for the activation of other
fire-fighting equipment, without need of extra power supply
.
III
Features
Distributed intelligent products, plug-in structure design.
With dual capacitor energy storage, and driving the equipment in a pulsed manner, the reliability is
improved.
There is no need to provide 24V operating power supply to the interface, which can reduce
construction costs.
Output terminal and the feedback terminal are provided with the function of line monitoring.
IV
Technical Data
Operating voltage: DC18V-28V
Standby current: ≤ 1mA
Output capacity: DC30V/2A
Acting time: 270mS. (time from activate to stop)
Temperature: -10
℃～
+50
℃
Humidity: ≤95%GH (40±2 ) without condensation
℃
Status indication: When charging, both “Input” and “Output” indicators flash in a quick manner,
and the “Input” indicator flashes in a quick manner when fully charged; When activated, the
“Output” indicator is illuminating and the “Input” indicator is illuminating when receiving a
feedback signal; When there was fault on Output or Input, the corresponding indicator will flash in
a slow manner.
Loop wiring: Non-polarity
Maximum charging current: 4mA (when the energy of capacitors is down to zero, it is charged by
loop power);
Charging time: about 48s (the two lights flash in a quick manner when charging; the energy
storage voltage is 30V ± 2V when fully charged, and the input action monitoring light flashes
when fully charged)
