Velocity VDOT-SCM-SCI Instruction Manual

Instruction Manual
VDOT-SCM-SCI Sounder Control 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
EOL Resister (VDOT-RE-10k) ......................................................1
General Description
VDOT-SCM-SCI Sounder Control Module with Short Circuit Isolator is
an output module intended for use in addressable two wire systems,
which provides the control of NAC (Notification Appliance Circuit)
devices. The Notification Appliance Circuit can be wired on Class A and
Class B.
General Operation
Normal standby condition: The module receives polling from a control
panel at the regular interval. Polling LED (green) flashes.
Active condition: When receiving a control signal from the control panel,
the module operates NAC devices, and Output LED (red) illuminates.
CAUTION
!
CAUTION
!
CAUTION
!
Trouble condition: If an overcurrent occurs because SLC (Signaling Line
Circuit) is shorted, SCI LED (yellow) illuminates, and the module
communicates to the control panel the short status. The module also
communicates to the control panel the open/short status of NAC.
SCI (short circuit isolator) Function
The module has a built-in short circuit isolator. SCI circuit prevents
entire loop failure in the event of a short between L+ and L- on the loop.
If a short is detected between L+ and L-, the yellow LED indicator is
illuminated. The line between Lin- and Lout- is disconnected
automatically to isolate the short circuit, and short circuit status is
communicated to the control panel. Upon removal of the short condition,
the module will automatically connect between Lin- and Lout- to restore
the entire loop to the normal operating status.
1
ZETA ALARMS LIMITED
72-78 MORFA ROAD, SWANSEA, SA1 2EN
http://www.velocitydetection.com
Output LED (RED)
Polling LED (GREEN)
SCI LED (YELLOW)
Address Setting Port
Figure 1
Figure 2
GLT-299-7-14 Rev.01
Jan 24, 2022
mm(in)