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8.0
Other Information
8.1
Memory, Day Mode, Night Mode and Remote Walk
Test
Note:
Memory, Night Mode and Remote Walk Test require a supply
voltage on Terminal 8 to activate these features. This supply
voltage must be between 6 and 18 VDC. You may use a switch as
shown below:
Or use an external power supply as shown below:
Note:
Control voltage: +6 to +18 VDC = ON (Switch Closed)
0 VDC = OFF (Switch Open)
•
Day Mode: The Day Mode disables the alarm memory and allows the
LED (if activated) to operate normally.
•
Memory: When the DS939 is in the Night Mode the memory is
activated. This allows the detector to store an alarm for display at a
later time.
Note:
Memory mode requires that the LED jumper be in the ON position.
•
Night Mode: The Night Mode enables the alarm memory and disables
the LED operation.
•
Remote Walk Test: This feature allows the LED operation to be
remotely enabled via Terminal M for walk testing. This feature is used
when the LED operation is disabled by having the LED jumper in the
OFF position.
Desired Action
Control Voltage (Terminal M)
Turn ON Night Mode
ON
Turn OFF Night Mode/
OFF
Display Stored Alarm
To RESET Stored Alarm
ON
Turn ON Remote Walk Test
ON
(if OFF)
Turn OFF Remote Walk Test
ON
(if ON)
8.2
Anti-Vandal Screw
•
After the cover has been closed, the entire assembly can be secured
together using the supplied anti-vandal screw
DS939 Installation Instructions
LED Jumper
(for more than 20 seconds)
(from Night Mode)
(for more than 5 seconds or
enter Night Mode)
(for more than 5 seconds but
less than 20 seconds)
(for more than 1 second but
Less than 20 seconds)
.
© 2003 Bosch Security Systems
8.3
Maintenance
At least once a year, the range and coverage should be verified. To ensure
continual daily operation, the end user should be instructed to walk through
the far end of the coverage pattern. This ensures an alarm output prior to
arming the system.
9.0
Coverage Pattern
Meters
0
1.5 3.0 4.6 6.1 7.6 9.1 10.7
15
F
10
e
e
5
t
0
0
5
10
15
20
Feet
Coverage shown at 12 ft. (3.7 m) mounting height.
10.0 Coverage Pattern Masking
The DS939 is provided with a set of masks to allow masking undesired
areas. The masking kit contains two 120° and two 90° masks. The masks
are designed to go on the outside of the detector. Do not attempt to open
the detector to place the masks on the inside.
With the supplied masks, you can mask 90°, 120°, 180°, 210° 240° or 330°.
Some examples are shown below.
120° Mask
ON
Masking 120°
ON
ON
OFF
OFF
Coverage with 120° masked
Coverage with 240° masked
10.7
9.1
7.6
6.1
4.6
3.0
1.5
35
30
25
4.6
20
M
3.0
e
15
t
e
1.5
10
r
s
0
25
30 35
5
F
e
0
e
t
5
10
15
20
25
30
35
35
30
25
20
15
10
90° Mask
Masking 180°
Coverage with 180° masked
Coverage with 90° masked
Meters
0
1.5 3.0 4.6 6.1 7.6 9.1 10.7
10.7
9.1
7.6
6.1
4.6
3.0
M
1.5
e
t
0
e
r
1.5
s
3.0
4.6
6.1
7.6
9.1
10.7
5
0
5
10
15
20
25
30 35
Feet
Coverage with 210° masked
Page 3
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