Installation must only be performed by authorized and specialized personnel!
Electrostatic discharge (ESD)! Electronic components could become damaged.
Ground yourself using a wrist strap or take other suitable actions.
FLM-420-O2 Output Interface Modules have two semiconductor outputs (OC) for controlling external devices. The
outputs can be switched independently, are electrically isolated from the LSN loop and protected against short
circuits. Power can be supplied to consumers either separately for each output, via LSN, or externally.
The FLM-420-O2-D is installed on a DIN rail in accordance with EN 60715 with enclosed adapter (see Figure 1,
Page 4; removal, see Figure 2, Page 5).
Fit a rotary switch in the required position using a pan head slotted screwdriver (see Figure 4, Page 6).
0 0 0
Loop/stub in LSN improved version mode with automatic addressing
0 0 1 - 2 5 4
Loop/stub/T-taps in LSN improved version mode with manual addressing
CL 0 0
Loop/stub in LSN classic mode (address range: max. 127)
2 5 5 - 2 9 9
Non-permitted address range (error message on fire panel)
With consumer power supply via
LSN-Power: see Figure 6, Page 7
External power supply unit: see Figure 7, Page 7
LSN: b1+ | a- | b2+
POWER IN: POW- | POW+
OUT/POW+ and POWER IN/POW+ are linked internally.
LSN input voltage
Max. current consumption from LSN
Max. switched voltage of outputs
Max. output current rating
External power supply
Permissible wire diameter
Cable length per output
Permissible operating temperature
Permissible storage temperature
Permissible relative humidity
Protection class as per IEC 60529
Classes of equipment as per IEC 60950
Housing material and color
Dimensions (with adapter)
Bosch Sicherheitssysteme GmbH
LSN b incoming / LSN a / LSN b outgoing
Reference potential (+)
Output 1 (switched negative potential)
Output 2 (switched negative potential)
15 to 33 V DC
30 V DC
700 mA per output
5 to 30 V DC
0.6 to 3.3 mm
max. 3 m
-20 °C to +65 °C
-25 °C to +80 °C
<96 %, non-condensing
Class III equipment
PPO (Noryl), gray white (similar to RAL 9002)
approx. 110 mm x 110 mm x 48 mm (W x H x D)
F.01U.012.996 | 5.0 | 2011.06