Flowserve L75 Series Electric Actuator - Manual (Page 7)

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L75 Series Electric Actuator — Modbus RTU FCD LMAIM7502-00 – 07/05
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Adjustment of Switch Cams
1. Loosen captive cover screws and remove lid, turning slightly while lifting.
2. Place the actuator in the CW position and apply voltage to the Modbus RTU Interface Card.
3. Loosen the CW cam set screw.
4. Adjust the cam associated CW limit switch clockwise until the CW LED is illuminated.
5. Tighten the cam set screw for the CW cam.
6. Place the actuator in the CCW position.
7. Loosen the CCW cam set screw.
8. Adjust the cam associated CCW limit switch rotate counter-clockwise until the CCW LED is
illuminated.
9. Tighten the cam set screw for the CCW cam.
10. Cycle the actuator to insure that each LED is illuminated at the appropriate time. Some minor
readjustment might be necessary.
11. Clean base, lid flanges, and replace lid on base.
NOTE: Make sure wires are not caught between flanges
12. Tighten captive screws.
Board Indicators
The Modbus RTU Interface Board contains several LED indicators that are helpful when initially config-
uring the device or when troubleshooting. Refer to figure one for the locations of the indicators.
CW The CW LED illuminates to indicate motor circuits are being driven to cause movement in the
CW direction. The LED will stay on during valve movement and will remain on until a stop movement
command is received.
CCW The CCW LED illuminates to indicate motor circuits are being driven to cause movement in the
CCW direction. The LED will stay on during valve movement and will remain on until a stop movement
command is received.
SW3 The SW3 LED illuminates when the CW limit switch is activated (closed) with the valve in the full
CW position.
SW4 The SW4 LED illuminates when the CCW limit switch is activated (closed) with the valve in the
full CCW position.
COMM The COMM LED illuminates whenever the actuator is receiving or transmitting a message. The
COMM LED will blink when any message is received - even if the message is for another actuator.
Termination Resistors
Termination resistors are not required at master or slave units.