5
Electrical connection
General safety notes
DANGER!
Danger of electric shock! Do not touch any live com-
ponents! Electrical equipment carries a dangerous
electrical voltage.
–
Only skilled qualified electricians are allowed to
work on the electrical system.
–
Switch off the power supply before working on
any electrical equipment.
5.1 Limit switches (fire dampers with
fusible link)
Fig. 39: Wiring of limit switches, example
1
Indicator light or relay, to be provided by others
A Type of connection normally closed
B Type of connection normally open
The limit switches must be connected according to
Indicator lights or relays may be connected as long
as the performance specifications are taken into
consideration.
Connection boxes must be fixed to the adjoining
structure (wall or ceiling slab). They must not be
fixed to the fire damper.
Type of
connection
Limit
switch
Damper
blade
Electric cir-
cuit
A
Not
actuated
CLOSED or
OPEN position
not reached
Closed
B
actuated
CLOSED or
OPEN position
reached
Closed
5.2 Spring return actuator
Fig. 40: Actuator connection, example
1
Switch for opening and closing, to be provided by
others
2
Optional release mechanism, e.g. TROX duct
smoke detector Type RM-O-3-D or RM-O-VS-D
3
Indicator light for CLOSED position, to be provided
by others
4
Indicator light for OPEN position, to be provided by
others
The fire damper may be equipped with a spring
return actuator for a supply voltage of 230 V AC or
24 V AC/DC. See the performance data on the
actuator rating plate.
The spring return actuator must be connected
according to the wiring example shown. Several
actuators can be connected in parallel as long as
the performance specifications are taken into con-
sideration.
Connection boxes must be fixed to the adjoining
structure (wall or ceiling slab). They must not be
fixed to the fire damper.
Note:
For wiring explosion-proof spring return actuator
see "Supplementary operating manual for explosion-
proof fire dampers Type FKA2-EU".
Actuators with 24 V AC/DC
Safety transformers must be used. The connecting
cables are fitted with plugs. This ensures quick and
easy connection to the TROX AS-i bus system. For con-
nection to the terminals, shorten the connecting cable.
5.3 Spring return actuator and duct
smoke detector RM-O-3-D
Note:
For connection examples and further details see
the RM-O-3-D operating and installation manual
Electrical connection
Spring return actuator and duct smoke detector RM-O-3-D
Fire damper Type FKA2-EU
55
