PID valve controllers offer universal application
An
AMOT product story
Edited by the Engineeringtalk editorial team
Jan 30, 2007
Stand-alone electric PID valve controllers are designed for fully configurable high-performance operation with easy installation, setup and maintenance.
AMOT has introduced new stand-alone electric PID valve controllers in simple panel mounting or complete control panel formats designed for fully configurable high-performance operation with easy installation, setup and maintenance, along with advanced solid state relays having significant operating advantages over standard relays.
Model 8071D is a universal panel-mount controller and the 8072D wall mounting control panel is a compact and robust unit incorporating the controller and two solid state relays in a splash-proof enclosure approved to IP67.
The panel unit can also be used with the SSRs to provide a direct high-power interface to a valve actuator.
Controlling the position of electrically or electropneumatically actuated valves, these devices were developed for AMOT G Series temperature control valves.
Universal sensor inputs maximise system design flexibility by using two- or three-wire RTDs, thermocouples and standard 4-20mA signals.
Featuring two logic level valve control outputs and digital filtering user-configurable to meet the needs of a wide range of systems, the controllers have two large displays clearly indicating process and set point values.
Two set points and two complete parameter sets may be programmed and selected internally or externally, and two alarm outputs are standard.
Panel unit mounting is to DIN 43700 and electrical connections are via cage clamp terminals for wires up to 1.5mm.
The wall-mounted control panel is pre-wired with all external connections made using standard DIN rail mounted terminal connections for ease of installation.
The robust optoisolated SSRs provide high current switching to actuator motors with a switching current capacity of up to 25A.
They give excellent transient protection and switching life, with zero voltage switching eliminating the arcing associated with traditional relays.
Input sensing range is selectable as required, typically at 0 to 120C, with a maximum of -200 to +850C.
Input accuracies are within 0.05% using RTDs, 0.25% with thermocouples and 0.1% for 4-20mA signals.
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