ZPA Pečky 52 030, Mounting Instructions

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5. ACTUATOR FEATURES
Torque switches
Actuators are fitted with two torque switches (MO, MZ), each for one direction of actuator output shaft motion.
Torque switches may work in any point of the operating stroke except where they are interlocked (Breakaway torque).
Tripping torque value can be set up within the range specified in Table 1 or 2. Torque switches are interlocked in
the event that once switched off they lose load torque. This provides protection of actuator against so-called “pulsing”.
Position switches
Position switches PO, PZ delimit the working stroke of the actuator (one switch for each limit position).
Position signalling
Actuator’s output shaft position is signalled by two signal switches SO, SZ – each for one output shaft motion
direction. Switching point of micro switches can be set up in the entire range of working stroke, except a tight range
before micro switch tripping point, which deactivates the electric motor.
Position transmitters
Actuators MODACT MON, MOP, MONJ may be delivered without position transmitter or they can be provided with
position transmitter:
a) Resistance transmitter 2 x 100
Ω
Technical parameters:
Position sensing by resistance
Rotation angle 0° – 160°
Linearity ≤ 1 %
Contact resistance max. 1.4
Ω
Permissible voltage 50 V DC
Maximum current 100 mA
b) Passive current transmitter type CPT 1Az. Current loop feeding is not part of the actuator. Recommended feeding
voltage is 18 to 28 V DC, with maximum loop load resistance of 500
Ω
. Current loop must be earthed in one point. Feeding
voltage does not need to be stabilized, however, it must not exceed 30 V, otherwise the transmitter may be destructed.
Range of CPT 1Az is adjusted using potentiometer on the transmitter’s body, and output value is adjusted by rotating
the transmitter accordingly.
Technical parameters of CPT 1Az:
Position sensing by capacity
Working stroke adjustable 0° – 40° to 0° – 120°
Non-linearity ≤ 1 %
Non-linearity including gears ≤ 2.5 % (for max.stroke 120°).
Hysteresis including gears ≤ 5 % (for max. stroke 120°)
(Non-linearity and hysteresis relate to signal value of 20 mA.)
Load resistance 0 – 500
Ω
Output signal 4 – 20 mA or 20 – 4 mA
Feeding voltage for Rz 0 – 100
Ω
10 – 20 V DC
for Rz 400 – 500
Ω
18 – 28 V DC
Maximum feeding voltage ripple 5 %
Maximum power input of transmitter 560 mW
Insulation resistance 20 M
Ω
at 50 V DC
Electrical resistance of insulation 50 V DC
Temperature of working environment -25 °C to +60 °C
Temperature of working environment – extended range -25 °C to +70 °C (other ranges upon request)
Dimensions ø 40 x 25 mm
c) Active current transmitter type DCPT. Current loop feeding is part of the actuator. Maximum load resistance of
loop is 500
Ω
. For MODACT MON, MOP, MONJ Control versions with ZP2.RE5 regulator, the current transmitter is
used as position sensor.
DCPT is easy to adjust by means of two pushbuttons with LED on the transmitter body.