Technical Data Sheet 2.50-35.021-01-en Rev
FSM21 Front Switch Module
For connection to the FBM38 fieldbus module.
D e v i ce De s c ri p ti on
A
Application
The FSM21 front switch module is operated with the FBM38 fieldbus module, and is
used for manual operation of two 1 or 2-stage units, each with two
operating and malfunction message displays per control channel.
A load/rolling switch with switching delays can be set on the FBM38 fieldbus module.
The FSM21 and FBM38 modules form a single operating unit.
Type
FSM21
Front switch module for the FBM38 fieldbus module, used for
manual/automatic control of two 1 or 2-stage units.
Switch-on load/rolling switch with settable switching delays.
Technical Data
Operation
Only in connection with the FBM38 fieldbus module
Operating voltage DC 12 V ±20%, 67 mA, 0.8 VA at nominal voltage
Power is supplied over the QB interface
Connection
Terminal connection to QB interface, 4-wire,
maximum cable length 200 m
Controls
Two manual/automatic switches for the
Automatic/Off/Position1/Position2 positions with mechanically
adjustable switch stop for limitation of the switching positions
Switch 1 switches the FBM relay outputs K1 and K2
Switch 2 switches the FBM relay outputs K3 and K4
Displays
Four green signal LEDs
For displaying operating messages on the binary FBM inputs
(can be switched off) 51/IN–54/IN (“Remote” operating mode);
For status displays of the FBM relay outputs (“Local” operating mode)
Four red signal LEDs For displaying malfunction messages on the binary FBM inputs 55/IN–
58/IN
Overvoltage category
III
Rated impulse voltage
800
V
Level of contamination
2
Automatic action
Type 1
Degree of protection
IP20
Ambient
temperature 0–45 °C
conditions
Humidity
20–80% r.h., non-condensing
Weight
80
g
A
ccessories
WAS01
Set for wall mounting
Dimensions
23
45,6
8
13
2,5
11
0
25,4
50
12
2,5
FSM21
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