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1. APPLICATION
MODACT MON, MOP, MONJ series actuators are intended for actuating valves or other appliances suitable for
control using actuators’ rotary reverse movement. Other application than for operating valves must be consulted with
manufacturer. Actuators may work in remote-controlled circuits. Actuators fitted with current transmitter may also work in
automatic control circuits in S4 – 25%; 1,200 h -1 operating mode.
Depending on the relevant version, MODACT MON, MOP, MONJ Control actuators may be fitted with position
regulator, reversing contactors, electric motor current protection, and electronic brake. Control elements, working in
regulating circuits, can be set depending on the analogue input signal value of position regulator. They can be also
delivered only with reversing contactors, or with reversing contactors and electronic brake.
2. WORKING ENVIRONMENT, OPERATING POSITION
Working environment
MODACT MON, MOP, MONJ actuators are resistant to operating conditions and external impact classes AC1, AD5,
AD7, AE4, AE6, AF2, AG2, AH2, AK2, AL2, AM-2-2, AN2, AP3, BA4 and BC3 pursuant to ČSN 33 2000-5-51 ed 3.
When located in outdoor areas, we recommend you to provide a light shelter to prevent direct impact of atmospheric
conditions. The shelter should overreach the actuator’s ground plan by at least 10 cm at the level of 20 to 30 cm.
When actuators are located in a working environment with temperatures below +10°C, with relative humidity exceeding
80%, below a shelter, or in tropical areas, it is always necessary to use thermal element that is mounted to all actuators.
Actuators can be applied in premises with inflammable and non-conductive dust unless such environment
adversely influences the electric motor’s function. In such case, the CSN 34 3205 standard must be consequently
adhered to. Dust should be wiped off when the dust layer thickness reaches about 1 mm.
Notes:
Sheltered areas are considered those where the fall of atmospheric precipitations under the angle up to 60° from
vertical axis is prevented.
Electric motor must be located in areas providing free access of cooling air so that warm air blown out is not
re-aspired by the electric motor. Minimum distance from wall for fresh air access is 40 mm. The area where the electric
motor is located must be sufficiently large, clean and ventilated.
Ambient temperatures
MON, MON Control actuators are fabricated for ambient temperatures from -25 °C to +70 °C, from -40 °C to +60 °C
or from -60 °C to +60 °C.
MOP actuators are fabricated for ambient temperatures from -25 °C to +60 °C.
MONJ actuators are fabricated for ambient temperatures reaching from -25 °C to +70 °C.
Relative humidity from 10 % to 100 % with condensation.
External impact classes
Basic characteristics – extract from ČSN 33 2000-5-51 ed 3
1) AC1 – above-sea level ≤ 2000 m
2) AD5 – spouting water; water may spout in all directions
AD7 – shallow immersion, possible sporadic partial or full coverage (only for MOP)
3) AE4 – light dust formation
AE6 – strong dust formation (only for MOP)
4) AF2 – occurrence of corrosive or polluting agents is atmospheric; presence of corrosive pollutants is significant
5) AG2 – mean mechanical strain; in normal industrial operations
6) AH2 – mean vibrations; in normal industrial operations
7) AK2 – serious risk of plant and moulds growth
8) AL2 – serious risk of occurrence of animals (insects, birds, small animals)
9) AM-2-2 – normal level of signal voltage. No additional requirements.
10) AN2 – mean solar radiation. Intensity > 500 and ≤ 700 W / m2
11) AP3 – mean seismic impacts; acceleration > 300 Gal ≤ 600 Gal
12) BA4 – capability of persons; instructed persons
13) BC3 – frequent contact of persons with ground potential; persons often touch foreign conductive parts or stand
on conductive substrate
