WESTLOCK CONTROLS CORPORATION
280 N. MIDLAND AVE., STE. 258, SADDLE BROOK, NJ 07663 TEL: 201-794-7650 FAX: 201-794-0913
www.westlockcontrols.com
10/5/2013
TECH-477/D.W.O. 21424
Page 12 of 206
Remote Position Control
Since valve position feedback to the ICoT PA positioner is
accomplished by non-contacting means, the ICoT PA has
the unique ability to be mounted remotely (up to a distance
of 50 feet, optionally 150 feet) from the device it is
controlling. In the event the control valve is located in a high
vibration or extremely corrosive environment, the non-
contact position feedback feature allows for isolated
placement of the positioner.
1.4.3 Local Graphic LCD
The ICoT PA
positioner is supplied with a digital
communication interface PA or a 3-button keypad interface. Both
versions are furnished with a graphic LCD, and allow for automated
calibration of the positioner. The local LCD provides a multitude of
onsite diagnostic information. The LCD shows input current, set-
point and current position. The values displayed range from 0.0% to
100.0%. Displayed resolution is in 0.1% increments, however,
internal calculations are maintained at higher precision.
1.5
Special Features
On-Board Sensors
The ICoT PA positioner has the capability to monitor its
operation. If an error or failure condition
occurs, it will
be displayed on the local LCD, or if the positioner is
supplied with a PA interface,
the error codes will be
displayed on a hand held terminal or a PC maintenance station.
Note: Error codes are denoted on a label affixed to the LCD flip-up protective cover.
Local Keypad
The positioner is provided with a ruggedized 3-button keypad. The keypad can be
used for zero and span adjustments, as well as valve characterization and gain
adjustments.
Intelligent Calibration via PA
The parameters of the ICoT PA-IS positioner are fully accessible via PROFIBUS.
Manual or Automatic calibration can be initiated via the bus and parameters for altering internal
servo loop tuning are fully configurable. In this manner, positioner performance may be
optimized with a wide combination of valves and actuators via PROFIBUS.
Negligible Bleed
Designed to consume the least possible amount of control air at steady state, the ICoT 5500
Series positioner can greatly reduce the air consumption of your process and reduce the
demand on instrument air compressors. To increase reliability, the ICoT PA employs a patented
Westlock Controls
ICoT PA Rev 1.01.00
25.5
°
C
R %PS 50.0 %SP 50.0
PA-CTR
OK
