Velocity VDOT- SCI Instruction Manual

Instruction Manual
VDOT- SCI Short Circuit Isolator Module
Before Installation
Please read these instructions carefully and keep for future reference.
The information in this document is subject to change without notice.
For updates please refer to our website.
Do not use the products outside the rated power supply voltage range
specified in the Specifications. It may cause a fire or damage to
equipment.
Do not disassemble, repair, or modify the products. It may cause a fire or
electric shock.
Make sure to turn the power off before commencing any wiring work.
Otherwise it may cause electric shock or damage to equipment.
Note ： Follow the requirements for the installation of the product in
accordance with the Specifications. Otherwise it may cause malfunction.
Note ： Do not install the product in any location where oil, dust, iron
powder, chemicals, or hydrogen sulphide may occur or affect the product.
It may cause malfunction.
This package contains the following items:
Main unit ...........................................................................1
O u t e r c o v e r ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1
Instruction Manual
............................................................1
Tapping screw .....................................................................2
Pan head screw
..................................................................2
General Description
VDOT-SCI Short Circuit Isolator Module is a short circuit isolator
module that prevents an entire loop failure in the event of a short in the
loop. If a short is detected the yellow LED indicator illuminates, and
short-circuited area is isolated automatically. Upon removal of the short
condition, the module automatically connects the area to restore the
entire loop to the normal operating status. The module is not
addressable.
CAUTION
!
CAUTION
!
CAUTION
!
72-78 MORFA ROAD, SWANSEA, SA1 2EN
General Operation
Normal standby condition: The module monitors the voltage at the SLC
(Signaling Line Circuit).
Short condition: If an overcurrent occurs because SLC is shorted, SCI
LED (yellow) illuminates, and the short circuit is isolated.
Compatibility Requirement
To ensure proper operation, the module shall be connected to UL listed
control panel series.
Before Installing
Disconnect power to the control panel before installing the module.
If the module is installed in an existing operational system, inform the
operators and local authorities that the system will be temporarily out
of service.
1
ZETA ALARMS LIMITED
http://www.velocitydetection.com
SCI LED (YELLOW)
Figure 1
Figure 2
GLT-299-7-17 Rev.0
Jun 12, 2018
mm(in)