28 RHD250 to 4000 (Contrac) ELECTRICAL ROTARY ACTUATOR | SEI/RHD250/4000-EN REV. A
… 6 Exchange of position sensor
Mounting
Tension spring
Figure 50: Position sensor
The toothed gear pair of the position sensor is held in place by a
tension spring
1, to ensure backlashfree motion when the
direction of rotation is reversed.
1. Set the stop pin to the center position, as shown in Figure
50.
Fastening screws
Position sensor
Shaft gear
Sensor cable
Figure 51: Mounting position (Example shows RHD500)
2. Align the sensor and its gears with the actuator; set the first
toothed gear in 09:00 o’clock position (Figure 51) onto the
drive shaft gear
3.
3. Slightly move the sensor back and forth to pre-tension the
toothed gears with the difference ‘z’ until the second
toothed gear snaps in.
4. Fasten the screws
1 tightly.
5. Fasten sensor cable plug on sensor pcb
6. For the remaining assembly steps follow the disassembly
procedure in reverse order
7. After mounting is completed readjust the actuator range as
described in the setup section of this manual
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