Setting End-Of-Travel Limit Switches (Actuators Mfd. After 1/1/03) - Honeywell HercuLine 10260A Installation, Operation And Maintenance Manual

10260A Series Actuators Installation, Operations, and Maintenance Manual
may be detected by the clicking sound or with a continuity tester connected to the terminals. Both
the NC and NO contact states are available to the customer at the terminals (see Figure 3-11).
•
Rotate the actuator shaft, using the manual handwheel or the auto/manual switch, to the 100 %
position (this is 100 % for CCW operation using the left-hand scale or 0 % for CW operation
using the right hand scale). If the actuator is installed on a damper or valve, also make sure that
this position is synchronized with the travel of the final control element.
•
Rotate the #2 limit switch operating cam to activate at this position. The switch roller arm should
go from being in an up, not depressed state, to a depressed state as the cam is rotated in the
direction of the shaft rotation going toward the limit position. This will cause the switch to go
from NC to NO and turn off the power to the motor when the switch activates. Both the NC and
NO contact states are available to the customer at the terminals (see Figure 3-11).
•
If optional auxiliary switches were ordered, these switches may also be set at this time. (See
Section 4.4 for details of setting auxiliary switches.)
4. Once the cams are set in the correct positions, turn the locking nut clockwise until snug tight (it does
not have to be "hard" tight and does not have to completely flatten the spring washer).
5. Double check limit switch actuation by first manually driving the actuator to each end of travel and
hearing the switch click or by detecting it with a continuity tester. Secondly, drive the actuator to both
ends of travel (using the auto/manual switch or by providing minimum and full input signal) and make
sure the switches activate and turn off the motor.
ATTENTION
Make sure not to set the switch too close to the hard stop.
REFERENCE
An unactuated switch will have its normally closed (NC) contacts closed and its normally open (NO)
contacts open.
An actuated switch will have its NC contacts become open and its NO contacts become closed. Both NC
and NO contacts are available to the customer on the terminal board (Figure 3-11).
An unactuated switch has its roller arm in the up position when adjacent to the reduced diameter portion of
the cam.

4.3 Setting End-of-Travel Limit Switches (actuators mfd. after 1/1/03)

WARNING
While the unit is powered, a potentially lethal shock hazard exists inside the case.
ATTENTION
The first two cams (starting from the back) are for the 0 % and 100 % limit switches and should not need
any adjustments as they are factory set to stop the drive at 0 % and 100 %.
To adjust the limit switch cams (see Figure 4-1):
28 10260A Series Actuators – Installation, Operations, and Maintenance 2/03