Specifications

Antenna
Magnetic Contact (DS831)
LED
Indicator
The DS831 is a magnetic contact designed for
installation on doors and windows.
INSTALLATION PROCEDURE
Battery
Holder
To install magnetic contacts.
1. To open the housing, insert a small
screwdriver at the bottom of the unit
between the front and back cover and twist
the screwdriver to release the cover.
Tamper
Switch
Location
of wiring
knockout
PCB
Release
Tab
Loop
Terminals
1cm max
Operation
M
ode Ju
m
pe
r
Figure B.3: DS831 (cover off)
2. Remove the divider separating the battery from the contacts on the battery holder.
When you apply power and the Tamper switch is open, the DS831 enters Test mode
during which a transmission is sent every few seconds. You can terminate Test
mode by closing the Tamper switch.
Note: Due to the occurrence of voltage delay in lithium batteries that have been in
storage, the batteries may initially appear to be dead. In this case, leave the unit in
Test mode for a few minutes until the battery voltage level is stabilized.
1
When handling the PCB, do not apply pressure on the antenna.
3. From the Programming menu, select Devices, Zones [911].
Jumper Position Operation Mode
4. Select the zone to which you want to
register the transmitter; the system initiates
Registration mode. When Save? appears
on the panel’s LCD display, press 9.
Pins 1&2 Universal Transmitter
Pins 2&3 Magnetic Switch
Jumper
Removed
Magnetic Switch/
Universal Transmitter
5. After registration, press the DS831’s
tamper switch to terminate Test mode.
Table B.5: Operation Mode Jumper
6. Before permanently mounting the unit, test the transmitter from the exact
mounting position.
PCB
7. To remove the PCB, press the PCB release tab and carefully lift the
board and slide the board away from the back cover.
8. The DS831 is able to operate in three modes: Magnetic Switch,
Universal Transmitter or a combination of the two. If connecting a wired
contact loop (N.C.), connect the terminal block as follows: 1 - Alarm; 2 -
GND. For this purpose, a wiring knockout is provided in the back cover.
9. Mount the back cover using two screws and
replace the PCB. Use ISO 7050 (ST3.5 x 22) or
similar countersunk screws so that the screw head
will not touch the PCB – see Figure B.4.
HOUSING
Figure B.4:
Mounting
Screw Position
10. To open the magnet’s housing, insert a small screwdriver into one of the pry-off slots
located at either end of the magnet’s back cover and lift to separate from the front
cover.
-96- © MARMITEK