6
Sense of rotation
When looking at the output shaft in the direction towards the control box, the CLOSE direction of rotation is identical with
the clockwise sense.
Working stroke
According to Table No. 1.
Manual control
Manual control is performed directly by a handwheel (without clutch). It can be used even when the electric motor is
running (the resulting motion of the output shaft is determined by the function of the differential gear). When the handwheel is
rotated clockwise the output shaft of the actuator also rotates clockwise (when looking at the shaft towards the control box).
On condition that the valve nut is provided with left-hand thread, the actuator closes the valve.
Torque-limit switches in the actuator are set and work when the actuator is under voltage.
When using the manual control, ie. actuator is controlled mechanically, the torque-limit switches doesn´t work
and the valve can be damaged.
5. ACTUATOR OUTFIT
Position indicator
The actuator can be fitted with a display as an option for electronic system DMS2 ED. Actuator with electronic system
DMS2 is equipped with two-line display.
Anti-condensation heater
Anti-condensation heater is connected to
DMS and DMS ED electronic circuit. Switching of the anti-condensation
heater is controlled by a thermostat. From the factory is the switching temperature set to 10 °C. The temperature is
adjustable by adjusting software
DMS2. Input power of the anti-condensation heater is 10W / 230V.
6. ELECTRIC PARAMETERS
External electric connection
The electric actuator is equipped with a terminal board for connection to external circuits. This terminal board uses
screw terminals allowing conductors with a maximum cross-section 4 mm
2
to be connected. Access to the terminal board is
obtained after removal of the actuator cover. All control circuits of the electric actuator are brought out to the terminal board.
Connecting of actuators with connector – on special request.
Actuator internal wiring
The internal wiring diagrams of the
MODACT MOPED, 52 039 actuators with terminal designation are shown in this
Mounting and operating instructions.
Each actuator is provided with its internal wiring diagram on the inner side of the actuator cover. The terminals are marked
on a self-adhesive label attached to a carrying strip under the terminal block.
Isolation resistance
Isolation resistance of electric control circuits against the frame and against each other is min. 20 M
Ω
. After a dump
test, isolation resistance of control circuits is min. 2 M
Ω
. See Technical specifications for more details.
Current-carrying capacity and maximum voltage of micro switches
Micro switches maximum voltage is 250 V AC and DC at the following maximum current values:
MO, MZ
250 V AC / 2 A; 250 V DC / 0.2 A
SO, SZ
250 V AC / 2 A; 250 V DC / 0.2 A
PO, PZ
250 V AC / 2 A; 250 V DC / 0.2 A
Micro switches can be used only as single-circuit micro switches. Two voltages of varying values or phases must not be
connected to the terminals of one micro switches.
Electric strength of electrical circuits isolation
Circuits of anti-condensation heater
1 500 V, 50 Hz
Electric motor
Un = 1 x 230 V
1 500 V, 50 Hz
Un = 3 x 230/400 V
1 800 V, 50 Hz
