Duplex Pump Controller II (DPC2)
Model Number: 11928-5 (U.L. Listed)
(For External Transducers and Backup Float Switches)
Description:
The Duplex Pump Controller II (DPC2) model 11928-5 is a control and display
unit which automatically controls up to two single speed pumps. It is designed
to be the heart of a duplex pump control system for lift stations, water tanks,
and other fluid pumping applications. The DPC2 provides built-in pump
alternation, pump start time delay, high and low level alarms. It can use any
level sensing system that generates a 4-20 mA signal proportional to level as
well as backup float switches. The DPC2 is also capable of using up to two
additional 4-20 mA input signals as backup sensors in the event that the
primary sensor fails. The controller automatically detects and uses the sensor
type which is present and working. The DPC2 also includes an RS-232 serial
communications interface designed to support SCADA systems using a variety
of Modbus based communication devices giving the unit remote data
acquisition, monitoring, and control capability.
Applications:
- Wastewater Pump Station Level Control
- Water and Wastewater Plant Level Control
- Storm Water Level Control
- Liquid Level Control for Tanks
- Holding Pond Level Control
- Most Liquid Level Control Applications
Features:
- Controls up to 2 pumps with built-in alternation and
time delay between pump starts.
- Accepts 2 types of sensors including any 4-20 mA
level transmitter and floats switches.
- Automatically selects a backup sensor in the event
the primary sensor fails. If the primary sensor fails
then the system will operate with a backup 4-20 mA
signal sensor (optional) or backup floats.
- On, Off, High, and Low setpoints adjustable from
front panel or remotely via serial port.
- 40 segment bargraph displays level, and setpoints.
- External digital level display available.
- Pumps, sensors, and alarms status indicators on front
panel.
- Front panel test knob for simulated level input
testing.
- 4-20 mA signal output proportional to level.
- RS-232 serial port for SCADA communications
support.
- Uses non-volatile memory allowing system to retain
program software and setpoints during power loss.
- Proven software that allows for easy setup and
reliability.
- Custom software available from factory.
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Specifications:
Input Power:
- 12 VAC ±10%, 3 A max.
Operating Temperature Range:
- -30°C to +60°C (-22°F to +140°F)
Accuracy:
- ±0.25% of span
- Display Resolution: 2.5%
Ranges:
- Limited to external level sensor pressure range
Inputs (Non-isolated):
- 2 - Pump disables
- 5 - Float switches
- 1 - 4-20 mA level sensor (standard)
- 2 - 4-20 mA backup level sensors (optional)
Relay Outputs:
- Pump 1, 2, and High Alarm - SPST Form A - 15 A at 125 VAC
- Low Alarm - SPDT Form C - 10 A at 125 VAC
Discrete Outputs:
- System Error - Open Drain FET, Non-isolated
4-20 mA Current Loop Output:
- Non-isolated transmitter
- Total compliance of 12 VDC
Transient Protection:
Interconnect:
- Pluggable terminal blocks (screw type)
- Relays quick connect terminals (#250 tab)
- DE-9 connector for RS-232 Bus
Communications Protocol:
External Dimensions:
UL File Number:
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