Model 352 • Pump Controller, Two Relay, 4-20 mA Features Available for mounting in Delta Controls housings or other enclosures Housings may be surface or pipe stand mounted Optional direct reading LCD display Accepts 4-20 mA signal from any type transmitter; 2, 3, or 4-wire Supplies DC power for 2-wire loops, 3 or 4-wire transmitters Field selectable fail-safe action Optional pump control functions Lead/lag control Relay operate time delays Two alarm points Built-in loop power supply Selectable starting time delay Self-checking diagnostic routine Continuous setpoint indication Optional explosion-proof housing Image to Come Model 352 Specifications General Type: Supply Power: Input Range: Relays: Switching Action: Accuracy: Description The Delta Controls Model 352 Pump Controller is designed to operate as an alarm and/or adjustable differential level controller and is equipped with two relays, each featuring an individual 0–100% on and 0–100% off setpoint. It accepts a 4-20 mA input signal which is proportional to a process variable such as level. The 352 is microprocessor based and checks its input signal loop for integrity. The relays may be set up for direct or reverse fail-safe action. The 352 is equipped with a built-in loop power supply and accepts remote powered 4-20 mA signal. The 352 must be located in a safe area. The input signal wires may extend into the ignition hazard area through a suitable barrier. Features, such as lead/lag pump rotation, time delay starting, and alarms may be field programmed. Up to two pumps or two alarm points can be actuated from a single 352 pump controller. The optional Model 328 3.5 digit LCD readout display, may be field calibrated for engineering units. 244 | Pump Controllers & Accessories > Model 352 | deltacnt.com Transmitter Loop Power Supply: Multiple Pump Control: Temperature Range: Housing Rating: Microprocessor based 120 ACV , 240 ACV 50 Hz, 60 Hz, 24 DCV ± 15% variation 4-20 mA 2, 10 A at 250 ACV SPDT Basic alarm action, adjustable differential for on/off control 0.1% of full scale 24 DCV Selectable lead/lag, rotation of up to 2 pumps -20 °F to +170 °F (-20 °C to +77 °C) Classes 1 & 2, Divisions 1 & 2, Groups ABCD, EFG