The ABB Kent-Taylor 442R is a pneumatic indicating controller that delivers proportional plus integral control for precise process regulation. It accepts a 3 to 15 psi pneumatic input signal and outputs a proportional pneumatic control signal, making it suitable for monitoring and adjusting pressure, temperature, flow, and level across industrial processes. The unit features dual digital displays for programming and indication, LED alarm status indicators, and intuitive membrane-switch controls for real-time parameter adjustment.
Technical Specifications
Control Authority
• Proportional plus Automatic Reset (Integral) control modes
• Direct or reverse action operation
• Proportional response (gain): 0.2 to 35% output per % input
• Reset rate (integral): 0.05 to 200 repeats per minute
• Accuracy: ±0.55% of span
• Repeatability: 0.2%
• Dead band: 0.2%
• Speed of response: 6.1 ±0.5 seconds (60 Hz); 7.3 ±0.5 seconds (50 Hz)
Signal Interface
• Input: 3 to 15 psi pneumatic signal
• Output: pneumatic control signal
User Interface
• Dual digital displays (upper and lower)
• Three tactile membrane switches (Page Advance, Parameter Advance, Enter)
• Rotary bit-generator for parameter value adjustment
• Auto/Manual selector switch
• LED indicators for alarm status (A1, A2)
– Key Features
• Adjustable proportional gain eliminates the need for external amplification or custom configurations
• Integral reset function removes steady-state offset between setpoint and process measurement
• Metal case construction with wall/panel mounting lugs
• Weight: 1.6 lb (0.7 kg)
• Setpoint, zero, proportional gain, and reset rate adjustment controls
– Typical Applications
Process control loops requiring setpoint regulation with offset elimination. Suitable for cascade control configurations and multi-parameter industrial monitoring.
– Compatibility & Integration
The optional Model 4234 power supply provides stabilized 350 mA direct current output, available in 110–120 V a.c. or 200–220/240 V a.c. versions, with cable gland entries for supply and output connections.
