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DIFF TIME / DIFF ALARM calibration switch setting
The DIFFALARM features two 16-position DIFF TIME and DIFF ALARM switches that can be
adjusted separately. LWM-1 can be used for grades A1, A2, B and C.
The table below contains recommendations for special applications.
Application
Underground installation
(no road tunnels)
Installation on concrete ceilings
and other thermally
non-conductive material above
ground, out of direct sunlightg
Installation on insulated steel roof
or metal container, out of direct
sunlight
Installation on non-insulated steel
roof or in direct sunlight
Road tunnel
NOTICE!
If a false alarm is triggered by the DIFF ALARM, proceed as follows:
i
–
–
Technichal Data
Mechanics
Housing material
Overall dimensions
Weight
Displays
Test keys
Protection type
Color
Temperature range
Electrical
Voltage
Standby current consumption
Current consumption with DIFFALARM/MAX ALARM
Current consumption with malfunction
Switch-on current
F.01U.028.512 | A2 | 2007.03
Shorten the sensor cable for each control unit
Reduce the response grade, e.g. from A1 to A2
ABS
200 mm x 120 mm x 80 mm (W x H x D)
approx. 550 g
Green LED: in operation, continuously lit
Red LED: ALARM DIFF, continuously lit
Red LED: ALARM MAX, continuously lit
Yellow LED: malfunction, flashing light
2 x for simulating alarm, malfunction and LED test
IP 65
Gray, similar to RAL 7035
- 20 °C bis + 50 °C
DIFF TIME
DIFF ALARM
5
5
5
4
5
8
5
9
5
5
5
4
5
8
5
9
6
13
5
5
5
4
5
8
5
9
6
13
5
9
6
13
5
5
5
4
5
8
5
9
6
13
10 - 30 V DC
Max. 25 mA (with 24 V)
Max. 25 mA (with 24 V)
Max. 15 mA (with 24 V)
< 100 mA (with 24 V)
FCS-LWM-1
Response grade
A1 (blue cable only)
A1 (black cable only)
A2
B
A1 (blue cable only)
A1 (black cable only)
A2
B
C
A1 (blue cable only)
A1 (black cable only)
A2
B
C
B
C
A1 (blue cable only)
A1 (black cable only)
A2
B
C
Bosch Security Systems
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