Setting Of Limit Switching; Setting The Closed Limit Switch (Lsc) - AUMA SG 05.1 Operation Instructions Manual

8. SETTING OF LIMIT SWITCHING

Setting the Closed Limit Switch (LSC)

To set limit switch LSC, refer to Figures 1 and 2, and complete the setting instructions below.
NOTE: If the SG is not mounted to a valve when received, stop housing retainer plate bolts (03)
are loose. Stops must be set and bolts tightened prior to limit switch setting.
NOTE: If the mechanical stop was previously set at the valve manufacturer, it is not required to
loosen the stop assembly to reset the limit switches. The mechanical stops must be
loosened only if the actuator must run beyond the previous stop setting.
CAUTION: DISCONNECT ELECTRICAL POWER FROM THE ACTUATOR BEFORE
PROCEEDING.
• Loosen the four (4) cover bolts, and remove the control cover.
Remove the indicator disc, pulling upwards, to expose the cover plate (refer to Figure 2). The
black side of the cover plate provides adjustment for the closed-clockwise (CW) limit switch LSC.
• From the closed position, rotate the handwheel counter-clockwise to locate the valve in a mid-
position.
• Rotate the handwheel clockwise, until the valve is seated or previous mechanical stop setting is
reached, and back-off (counter-clockwise) four (4) full turns.
• Press down and turn spindle (A) in direction of the arrow. A ratchet will be felt and heard, the
pointer (B) turns for every 90 degrees.
CAUTION: DAMAGE MAY RESULT TO THE COUNTER GEAR MECHANISM IF THE SLOTTED
SHAFT IS NOT PUSHED DOWN WHILE TURNING TO ADJUST THE LIMIT SWITCH.
When pointer moves towards point (C), the spindle should not be turned any further. If the spindle
has been turned beyond that point inadvertently, continue turning and approach the setting point
again.
CAUTION: Make sure that spindle (A) springs up to its original position.
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