Digital Differential Pressure Controls

Series A4

The series A4 digital differential pressure controller is a patent pending microprocessor based pressure controller for positive, negative, and differential pressure as well as velocity and flow. The Series A4 differential pressure controller includes (2) 8A SPDT relays and an associated software package that allows full configuration of variables such as setpoints, dead band, engineering units, flow coefficients, and more. The programming is done from a user friendly menu on the OLED display or uploaded using an OptiLink™ programming key. The OLED also displays the exact setpoints or other user defined variables during normal operation. Furthermore, the menu structure can be customized by moving variables to different menu levels to accommodate many applications. Compared to other mechanical products, the Series A4 digital differential pressure controller has a significantly reduced depth, an improved look, and better performance at a similar price.

Specifications

Maximum Pressure:: 4" w.c. and less = 2 PSI; 5" w.c. and above = 10 PSI
Media compatibility:: Air and compatible non combustible, non corrosive gasses
Accuracy:: Axxx0-xx - 1.00%; Axxx1-xx - 0.50%; Axxx2-xx – 0.25%
Temperature Ranges: Compensated and Operating:: -10° to 140°F (-23° to 60°C)
Thermal Effect*:: +/- 0.012% FS/°F
Output Signal:: 4-20 mA (option)
Loop Resistance:: 750 Ω Max (for internally sourced power);
1800 Ω Max (for externally sourced power of 36 VDC
Power Supply:: Universal 24-240 VAC or VDC
Housing Material:: Glass Filled Nylon
Enclosure Rating:: Designed to meet NEMA 4X face; with optional
cover the entire product is weatherproof
Relays:: (2) SPDT 8 Amps @ 250 VAC, 5A @30 VDC
Electrical Connections:: screw terminals
Response Time:: <100 ms
Display:: 4 Digit, red LED, ½" digits; OLED programming display
Process Connection:: Push on connection for 3/16" tubing
Agency Approvals:: ETL, CE

* Custom calibration including improved accuracy and thermal effect are available.

Dimensional Drawing

Series A4 Digital Differential Pressure Controls

A4 pressure controller - Dimesional Drawing

Pressure Controller with Weather-proof cover

Model Numbers:

Model Configurator - Steps you through part number selection
Complete configuration chart

Accessories