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Smoke Control Damper
SDR
2
-M
Lindab reserves the right to make changes without prior notice
Last modified: 2021-10-26
Rev: 2021-03-26
Fig. 1
Dampers with actuating mechanism
Design .65
Belimo modulating actuators, BEN (BEE)-SR series for 24V
AC/DC are specially designed for remote control of fire
dampers. The position of the damper blade is adjustable
by means of control voltage 0 (2)...10V DC.
The signaling of the “OPEN” and “CLOSED” damper blade
positions is ensured by two built-in fixed “potential-free”
limit switches.
The actuator for operating the damper blade is mounted in
an insulated cover/box. It is accessible after removing the
cover lid. The electrical connection of the actuator is made
with non-flammable cables (or cables located in the adjoin-
ing cable duct), which pass through an opening made in
the wall of the insulated cover when installing the damper
or when connecting the power cables of the actuator. The
cable entry must meet a minimum fire resistance of 30
minutes.
2.1. Design with actuating mechanism
Design .44 and .54
Belimo actuators are used for dampers, series BEN,
BEE, BE for 230V AC resp. 24 V AC/DC, Schischek
InMax50.75-S actuators (universal 24V or 230V supply) are
used for large size of dampers.
After connection to the power supply voltage, the actu-
ator moves the damper blade to the “OPEN” position or
“CLOSED” (according to the corresponding connection,
see wiring diagram). If the power supply is interrupted, the
actuator stops at the current position. The signalling of the
“OPEN” and “CLOSED” damper blade positions is ensured
by two built-in fixed “potential-free” end- limit switches.
The actuator for operating the damper blade is mounted in
an insulated cover/box. It is accessible after removing the
cover lid. The electrical connection of the actuator is made
with a non- flammable cable (or a cable located in the
adjoining cable duct), which passes through an opening
made in the wall of the insulated cover/boxwhen installing
the damper or when connecting the actuator power cable.
The cable entry must meet a minimum fire resistance of 30
minutes.
2. Design
