Velocity VDOT- SCI User manual

GLT-299-7-17 R ev.0
Jun 12, 2018
1
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.
CAUTION
!
Do not disassemble, repair, or modify the products. It may cause a fire or
electric shock.
CAUTION
!
Make sure to turn the power off before commencing any wiring work.
Otherwise it may cause electric shock or damage to equipment.
CAUTION
!
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
Outer cover …………………………………………………………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.
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.
SCI LED (YELLOW)
Figure 1
Figure 2
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.
ZETA ALARMS LIMITED
72-78 MORFA ROAD, SWANSEA, SA1 2EN
http://www.velocitydetection.com
mm(in)

GLT-299-7-17 R ev.0
Jun 12, 2018
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Mounting
Mount the module directly to 4’’ square electrical box (UL Listed).
Secure the module to the electrical box, as shown in Figure 3.
Figure 3
Wiring
All wiring must conform to applicable local codes, ordinances, and
regulations.
Install module wiring in accordance with the wiring diagrams. Refer to
Figure 4.
Use cable AWG12-22 for wiring. Do not connect different gauge cables
at one terminal in order to prevent loosening. Use a fork terminal for
crimping two cables.
CAUTION
!
Do not connect cables in reverse polarity. Failure to connect the polarity
correctly could result in damage to the module and/or other equipment.
CAUTION
!
Note: All wiring is power-limited and supervised.
Figure 4
Routine inspection: Ensure the module is secure and undamaged.
Operation Test
The purpose of the Operational Test is to confirm the product’s correct
operation.
1) When carrying out site testing of the product, the control panel shall
be set to “one-man-walk test mode” prior to the test.
2) Take any necessary precautions to limit the sounding of the alarm
sounders/bells and any fire service summoning device.
3) Short between terminal Lin+ (Lout+) and Lin- (Lout-), and the SCI
LED (yellow) is illuminated. The short circuit isolator isolates the
devices connected after the short-circuited area, which makes these
devices have no response. Upon removal of the short condition, the
area is automatically connected to go back to the normal operating
status, and the SCI LED (yellow) turns off.

GLT-299-7-17 R ev.0
Jun 12, 2018
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FOR WARRANTY SERVICE, RETURN TO:
ZETA ALARMS LIMITED
72-78 MORFA ROAD, SWANSEA, SA1 2EN
http://www.zetaalarmsystems.com
Specifications
SLC Applied Voltage Rated Range 20 to 38VDC
SLC Current Consumption Standby 100μA
Activated (SCI Isolation) 22mA
SLC Line Impedance Up to 50 ohms
SCI on Resistance 0.2 ohms (max)
SCI Fault Detection Threshold 10V (min)
Visual Indicator（Status LED）SCI LED（YELLOW）
Ambient Installation
Temperature
0℃to 49℃(32°F to 120°F)
Storage Temperature -20℃to 60℃(-4°F to 140°F)
Max Relative Humidity Up to 93％RH，non-condensing
Environment Indoor dry use only
Terminal Screw AWG12 to 22
Dimensions 124mm H x 124mm W x 34.5mm D
(4.882’’ H x 4.882’’ W x 1.358’’ D)
(Mount to a 4’’ square by 2⅛’’ deep
box)
Weight Approximately 139g (4.9oz)
Conformity UL864
Warranties
1.1 Zeta warrants to the customers that:
(a) all products supplied hereunder will be of merchantable quality
and will comply with any specification agreed between Zeta and
customer.
(b) it is not aware of any rights of any third party in the market which
would or might render the sale of the products, or the use of any of
the trade marks on or in products, or the use of any of the trade
marks on or in relation to the products, unlawful.
1.2 In the event of any breach of the Zeta’s warranty in Clause 1.1(a)
whether by reason of defective materials, production faults or
otherwise, Zeta’s liability shall be limited to:
(a) replacement of the products in question; or
(b) at the Zeta’s option, repayment of the price where this had been paid.
And the warranty period is three (3) years from the shipment from
Zeta’s factory.
1.3 Notwithstanding anything to the contrary in this warranty terms,
Zeta shall not be liable to the customer by reason of any
representation or implied warranty, condition or other term or any
duty at common law, or under the express terms of this warranty
terms, for any consequential loss or damage whether for loss of
profit or otherwise and whether occasioned by the negligence of Zeta
or its employees or agents or otherwise, arising out of or in
connection with any act or omission of Zeta relating to Zeta or
supply of the products, their use by any customer.
1.4 Customer shall indemnify Zeta against all loss, damages, liabilities,
costs and expenses which Zeta may suffer or incur as a result of or
in connection with any breach by customer of this warranties terms
or any laws or regulations of any jurisdiction or any rules of any
governing authorities.