Motor Positioner Board; Overview; Available Adjustments; Table 4-1 Available Adjustments - Honeywell HercuLine 10260A Installation, Operation And Maintenance Manual

4.7 Motor Positioner Board

WARNING
While the unit is powered, a potentially lethal shock hazard exists inside the case.
ATTENTION
The Motor Positioner board is mounted inside the top extended cover. The cover with the Motor Positioner
board and cables still connecting it to the NCS Sensor and NCS board may be unscrewed from the actuator
housing and positioned nearby with cables connected to make adjustments.
The Motor Positioner board has been factory calibrated for 0 % and 100 % SPAN positioning. It has also
been set for default conditions given in Table 4-1.

4.7.1 Overview

The Motor Positioner board provides accurate feedback control of the actuator position proportional to a
0/4 – 20 mA input signal. It also provides selectable failsafe action, input filtering and deadband sensitivity
adjustment.
If the Motor Positioner option has been purchased by the user, its' calibration is factory set, but may be
adjusted as a part of the 10260A Series Actuator preliminary adjustment sequence. Once all adjustments
have been made, the Motor Positioner will be fully operational.

4.7.2 Available Adjustments

Operating adjustments are located on the printed circuit board accessed by removing the non-contact sensor
and terminal cover. Altogether, there are two jumpers and five potentiometers with the following
designations and functions:
Adjustment
Jumper
Jumper
Potentiometer
Potentiometer
Potentiometer
Potentiometer
Potentiometer
2/03 10260A Series Actuators – Installation, Operations, and Maintenance

Table 4-1 Available Adjustments

Marking
W1 Selects fail-safe actuator position. Selects full up or full
down. Remove W1 to disable fail-safe feature.
Default is "UP" position.
W2 Selects fail-safe actuator position if input signal is lost.
Selects stop, or a particular position determined by
R14. Remove W2 to disable fail-safe feature
Default is STOP.
Filter, R1 Input signal filter adjustment.
Default is MINIMUM.
Span, R7 Input signal span adjustment.
Zero, R11 Input signal zero adjustment.
Failsafe Set, R14 Adjust fail-safe position of actuator on loss of input
signal. Must be enabled by W2.
D.U.Sens., R19 Adjusts actuator motor deadband from 1 % to 5 %.
Default is ½ turn OFF maximum sensitivity. (This is ½
turn off of full CCW.)
Calibration Procedures
Function
35