Series QPC Quadraplex Pump Controller

Multiple Loads, SOSO or FOFO Output Logic

Series QPC Quadraplex Pump Controller is used where four pumps are required to alternate to provide equal run time on each. Alternating loads allows for equal wear on all pumps lengthening their operation life. The Series QPC has five inputs allowing the four outputs to operate properly even if one of the inputs fails to open or close. Four LED indicators show the load that is energized by the SPST output contacts. The QPC is available in two sequence configurations: sequence-on-simultaneous-off (SOSO) and first-on-first-off (FOFO). In the SOSO sequence, an additional load is energized each time a higher level switch is activated, and all loads are de-energized simultaneously when the lowest level switch deactivates. In the FOFO sequence, the loads are energized in the same manner as the SOSO sequence, but loads are de-energized individually as each level switch deactivates. In either sequence, the lead load position is advanced to equalize run time on each pump. An inrush delay on both models reduces line sags by preventing multiple loads from energizing simultaneously. Please see the online service manual for more details on SOSO and FOFO sequencing.

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

COVID-19 Update: Due to high customer demand, lead time on some products may be up to two weeks. While this is a developing health situation, we are working continuously to take the necessary measures to ensure that the products you need are available with minimal interruption.

Model Description Usually Ships* Price Code Order
Ships: 2-3 Weeks
Price: $524.00
Quadraplex pump controller, SOSO sequence. 2-3 Weeks* $524.00 N Order
Ships: 2-3 Weeks
Price: $428.00
Quadraplex pump controller, FOFO sequence. 2-3 Weeks* $428.00 N Order


Power Requirement:
120 VAC, 50/60 Hz.
Power Consumption:
2.5 VA (approximate).
100 k ohm.
Isolation Voltage:
2500 V (input to output).
Temperature Limits:
Operating: -4 to 131°F (-20 to 55°C); Storage: -40 to 185°F (-40 to 85°C).
Switch Type:
Switch Voltage:
5.1 V open circuit.
Switching Current:
10 μA, short circuit.
Electrical Rating:
5 A @ 120 VAC resistive; 278 VA inductive.
Response Times:
Power Up: <1 s; Operate: <25 ms; Inrush: 5 s; Release: <150 ms.
(4) LEDs show active load.
Polycarbonate dust cover.
16 oz (454 g).
Agency Approval:
Intrinsically safe to UL standard 913. For use in hazardous (classified) locations: Class I, Group A, B, C, D; Class II, Group E, F, G; Class III.

Product Literature


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