Page 6 Copyright © 1995-97 Detection Systems, Inc. DS1520/30 Installation Instructions
• Mounting
- Remove the cover.
- Remove the PC board.
- Mount the backplate to the desired lo-
cation.
- Replace the PC board.
- Route the wiring to the PC board.
- Secure the wire to the VS A10 with a
tie-wrap.
- Wire the system as necessary.
- Test the system for proper functionality.
- Replace the cover.
5.1.9 Using the Cable Inlets
The detector is shipped with a cable inlet designed to ac-
cept only one cable. Three additional cable inlets are avail-
able for different applications.
• The VS A11. This cable inlet is designed to accept
square conduit. To use this, the detector must be
mounted on a VS A1 mounting plate.
• The VS A12. This cable inlet is designed to accept
round conduit. The diameter of the opening is 3/4 of
an inch for use with 1/2 inch EMT.
.
• The VS A13. This cable inlet is designed to accept two
flexible stainless steel conduits. It also provides a knock-
out for a third cable.
6.0 Wiring
6.0.1 Wiring the Detectors
Bring the cable(s) to the detector. Feed them through the cable inlet and cut
them leaving 4 inches of cable after the strain relief.
Wire the terminals according to the following diagram. Fold the excess wire
inside the wiring area of the detector.
1
2
3
4
5
6
7
8
+
LED
Alar m
Tamper
Inp ut Po wer L ED
Al arm Ou tp ut
Tampe r Swi tch
Form "C"
re lay con ta ct
N ormal ly
Clo sed
Power
Relay contacts shown with power on,
no alarm and tamper switch closed
6.0.2 Wiring the VS A6 Movable Mounting Kit
The movable mounting kit has a two terminal T-strip. It includes a microswitch
and a reed switch. They both are supervising whether the detector is in the
Day or Night position.
The alarm loop should be connected in-series with both VS A6 switches so
that the system can not be armed if the detector is in the Day position.
When using the VS A14 Test Transmitter, the terminal block of the Movable
Mounting Plate may be used to power the Test Transmitter.
• Wiring
1+ 2 -
3
4
5
6
7
8
LE D
Al arm
Ta mp er
P ow er
EOL
Test
Alarm
Loop
Power
+
-
Ground
VS A6
VS A10
VS A14
+
-
DS1520
DS1530
Tamper
Loop
- If using an end of line resistor (EOL), use terminal 6 of the detector to
put the resistor in-series with the alarm relay.
- To put both of the Movable Mounting Plate's switches in-series, con-
nect the wire from the microswitch to terminal 4 of the detector.
- Connect the alarm loop from the Junction Box to the center terminal of
the VS A6 and to terminal six of the detector (if not using an EOL,
connect it directly to terminal five).
6.0.3 Wiring the VS A7 Keyhole Protection Kit
The Keyhole Protection Mounting Plate contains a microswitch that super-
vises the position of the lever.
The alarm loop should be wired in-series with the microswitch.
When the lever covers the keyhole, the microswitch is closed and the sys-
tem can be armed.
If using an EOL, wire it to terminal six of the detector to connect it in-series
with the alarm relay and the microswitch.
1 + 2-
3
4
5
6
7
8
L ED
Al arm
Tampe r
Power
EOL
Test
Alarm
Loop
Power
+
-
Ground
VS A10
VS A14
+
-
DS1520
DS1530
VS A7
Tamper
Loop
