6
Active current position transmitter DCPT
Rated output signal
4 – 20 mA or 20 – 4 mA
Rated working run
from 60° to 0 – 340°, regulated
Loading resistance
0 – 500 ohm
Non-linearity
max. 1 %
Supply voltage
18 – 28 V DC
Dimensions
ø 40 x 25 mm
Waviness of supply voltage
±5 %
Max. current consumption of transmitter
max. 42 mA
Insulation resistance
20 Mohm at 50 V DC
Electric strength of insulation
50 V DC
Temperature of operating environment
-25 to + 70 °C
Voltage between the transmitter box and the signalling wire must not exceed 50 V. The current loop is supplied
from the source DCPZ located inside the actuator.
Resistance position indicator
The resistance position indicator is formed of a double-wire resistor of variable resistance, each part of which
having resistance 100 ohm.
Total resistance
2 x 100 ohm with dev12 ohm
Maximum loading current
100 mA
Maximum direct voltage
(against frame) 50 V
Working run
0° to 160°
Non-linearity
max. 1 %
Local position indicator
The removable mechanically connected indicator of position of the actuator output shaft is fixed to the cam shaft
of the position unit. The local position indicator serves for orientational determination of position of the actuator out-
put shaft.
Actuator terminal board
The actuators are fitted with a common terminal board for connecting external electric circuits. The terminal board
is located under the actuator cover. All contacts of the micro-switches, circuits of the electric motor, and the earth-
ing terminal are connected to it. The terminal board enables connection of one wire of cross-section 2.5 mm
2
or two
wires of cross-section up to 1 mm
2
. The actuators are fitted with two cable bushings providing for connection of:
– in actuators MOKA 63: one cable of outer diameter 10 – 14 mm for control circuits and one cable of outer diam-
eter 13 - 18 mm for circuits of the electric motor;
– in actuators MOKA 125, 250: two cables of outer diameter 13 – 18 mm for control circuits and circuits of the elec-
tric motor;
– in actuators MOKA 500, 1000: one cable of outer diameter 13 – 18 mm for control circuits and one cable of outer
diameter 13 - 20 mm for circuits of the electric motor.
The cross-sections and diameters of cables must be specified in the order.
The actuators are fitted with the earthing terminals including a device against spontaneous releasing. The design
prevents the control circuits from being influenced by the power circuits.
The actuators are supplied with blinded bushings.
Insulation resistance
At temperature 20 ±5 °C and humidity 30 to 80 %, the insulation resistance is min. 20 Mohm. Under the most
severe working conditions, resistance of the insulation of electric circuits against each other and against the frame is
min. 0.3 Mohm.
Electric strength of insulation
Insulation of electric circuits against frame as well as against each other at temperature 20 ± 5 °C and humidity
30 to 80 % must withstand testing alternating voltage of sinus shape of frequency 50 Hz for 1 minute:
Electric circuits of actuator
Testing voltage
of rated voltage max. 250 V
1500 V, 50 Hz
Remote transmitter of rated voltage max. 50 V
500 V, 50 Hz
Electric motor of rated three-phase voltage 400 V (380 V)
1800 V, 50 Hz
According to GOST 183-74
Circuit of current transmitter CPT1AA
50 V DC
