Specifications

WESTLOCK CONTROLS CORPORATION
280 MIDLAND AVENUE, SADDLE BROOK, NJ 07663 TEL: [phone] FAX: [phone]
www.westlockcontrols.com
1/12/10 TECH-439/D.W.O. 19024 Page 9 of 58
Remote Position Control
Since valve position feedback to the ICoT positioner is
accomplished by non-contacting means, the ICoT has
the unique ability to be mounted remotely (up to a
distance of 50 feet, optionally 150 feet) from the device it
is controlling. The remote position sensor also has the
ability to work over a wider temperature range, from -
40C to 125C (-40F to 257F). In the event the control
valve is located in a high vibration, high temperature or
extremely corrosive environment, the non-contact
position feedback feature allows for isolated placement
of the positioner.
Local Graphic LCD
The ICoT positioner is supplied with a digital
communication interface (FF, HART
®
) 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.
On-Board Sensors
The ICoT 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 HART
®
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 (HART
®
Protocol)
The ICoT positioner responds to HART
®
commands for seeking the “valve closed”
position and assigns an instrument signal of 4 mA to this position. The counterpart
of the operation for a full open state is implemented next by setting the span value. Action
reversal is also configured. Additionally, provisions are made for altering internal servo loop
tuning via the HART
®
link. In this manner, positioner performance may be optimized with a wide
combination of valves and actuators.
Negligible Bleed
Designed to consume the least possible amount of control air at steady state, the ICoT 5000
Series positioner can greatly reduce the air consumption of your process and reduce the
demand on instrument air compressors. To increase reliability, the ICoT employs a patented
lapped spool and floating sleeve design. This balanced construction relies on an air bearing
which eliminates any metal to metal contact.
Westlock Controls
ICoT HART Rev 1.01.06
25.5°C
R %PS 50.0 %SP 50.0
12.0 mA OK