4
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.
For any wiring work, follow the national and local regula-
tions and guidelines for electrical installation.
Equipotential bonding
To prevent ignition sources due to static charges, the
fire damper must be integrated into the equipotential
bonding of the ventilation system.
Construction of equipotential bonding (by others):
Single-wire CU-line 4 mm
2
with ring cable lug.
Connection options of equipotential bonding:
Fire damper with ExMax/RedMax spring return
actuator
–
Terminal box at PA terminal
FKRS-EU with ExMax or RedMax spring return
actuator
The ExMax or RedMax spring return actuator has auto-
matic voltage detection 24 V – 240 V AC/DC. The
actuator detects the voltage automatically and does not
have to be adjusted.
Connect the spring return actuator according to the
wiring example.
Several actuators can be connected in parallel as long
as the performance specifications are taken into consid-
eration.
Functional testing requires a switch that interrupts the
voltage supply (by others).
The electrical connection is made in the terminal box.
The factory installed wiring must not be changed.
Attention!
If the voltage has been interrupted with either the switch
(1) or the optional release mechanism (2), the heating
(6) is not active.
Wiring example for ExMax or RedMax spring return
actuator
Fig. 2: 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 (out-
side the Ex zone)
3
Indicator light for CLOSED position, to be provided
by others
4
Indicator light for OPEN position, to be provided by
others
5
Terminal for equipotential bonding 4 mm
2
6
Heating
TROXNETCOM AS-i
The fire dampers with spring return actuator and module
AS-EM/C (accessory) form a functional unit ready for
automatic operation.
The module is to be installed and wired outside of the
potentially explosive atmosphere by others
The module transmits the control signals between
the spring return actuator and the controller and
power unit. This allows for controlling the actuator
and monitoring the actuator run time during func-
tional testing.
The 24 V DC supply voltage for the module and the
actuator is transmitted using the AS-i flat cable.
Status display:
–
Operation
–
4 inputs
–
2 outputs
Electrical connection
Explosion-proof fire damper Type FKRS-EU
8
