5 Reassembly
21 of 44
EA-C
The output (terminals 14 and 17) supplies 21-40 V DC unregulated voltage, 100 mA
max.. If a feedback value transmitter is used to supply a setpoint signal for the
optional process controller, a fixed-voltage regulator must be used for 24 V DC
voltage supplies. A fixed-voltage regulator is also required when using BOATRONIC
MS-420. For voltage tolerances please refer to the relevant product literature.
5.6 Heating resistor (optional)
On option, a heating resistor can be installed to heat the actuator's terminal
compartment. Condensation inside the actuator if used outdoors, in environments
with highly fluctuating ambient temperatures or high atmospheric humidity will thus
be prevented. The heating resistor inside the actuator is powered by the actuator's
power supply, i.e. separate mains connection is not required.
ü
The power supply has been disconnected.
ü
The actuator has been secured against unauthorised start-up.
ü
The actuator has been moved into the set limit position.
ü
The operating manual for the heating resistor included in the scope of supply is
on hand.
1. Open the actuator cover. (
ð
Section 5.4, Page 16)
2. For all other steps, see the operating manual supplied.
3. The internal cable must be routed in such a way that it cannot come into
contact with the actuator cover seal and/or moving components.
5.7 Setting the limit switches
The standard limit switches (1) and (2) of the 3-point actuator serve to stop the motor
when the limit positions have been reached. The additional limit switches (3) and (4)
are designed as volt-free changeover contacts for open/closed position feedback.
3
1
2
4
5
6
Fig. 22:
Setting the switching cams
1 Limit switch for CLOSED position
4 Switching cam for OPEN signal
2 Limit switch for OPEN position
5 Locking screw
3 Switching cam for CLOSED signal
6 Gear screw
Summary of Contents for EA-C
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