Controller 1
C1050 SZ Heat Pump
Controller 2
M2000 FlexIO
Supply
24 VAC, Class 2
Relays
17A @ 277 VAC
Protocol
Modbus RTU (RS485)
Panel
NEMA 1, UL listed
Overview
The Prolon PL-PN2-4H-7F is a pre-wired, UL listed NEMA 1 two controller panel built with a Prolon C1050 Single-Zone Heat Pump Controller and a Prolon M2000 FlexIO Controller. Isolation relays rated 17A @ 277 VAC on all digital outputs, overcurrent fuse protection and clearly marked terminal blocks come factory wired.
The C1050 Single-Zone Heatpump Controller operates residential or commercial heatpump equipment using PI control loops as a standalone controller that relies on the demand from a local sensor rather than acting as a master to zone controllers. The M2000 FlexIO Controller is a general purpose HVAC controller whose inputs and outputs can be individually configured for applications not covered by a dedicated Prolon program. The panel contains 2 Modbus RTU (RS485) nodes and runs stand-alone or on a Prolon network of up to 127 nodes.
Specifications per Prolon Pre-Wired Two Controller Panel datasheet PL-DATA-PANEL2CON-EN-V1; Prolon PL-C1050-HPS Controller datasheet REV 7.3.0 / PL-DATA-C1050HPS-C/F-EN; Prolon PL-M2000-FLX Controller datasheet REV 7.3.0 / PL-DATA-M2000FLX-C/F-EN; Prolon C1050 Heatpump Controller Hardware Guide (HP and HPS) REV 7.3.2; Prolon M2000 FlexIO Controller Hardware Guide REV 7.3.0; Prolon Two Controller Panel product page (proloncontrols.com) retrieved 2026-09-24. Reviewed September 2026.
Best For
- Single-zone heat pumps controlled from one room sensor
- Multi-point custom sequences needing 9 inputs
- Mechanical rooms where two controllers share one UL listed enclosure
Warranty
For warranty coverage on this Prolon panel, contact ZOT Supply at sales@zotsupply.com or 855-825-2811.
Key Features
Two independent controllers
Controllers need not be related in function and may each serve completely different sequences from separate power sources.
17A isolation relays
Every digital output is isolated by a relay rated 17A @ 277 VAC built into the panel (C1050 = 4, M2000 = 5), and the controller outputs are protected by resettable fuses.
Fused, pre-wired NEMA 1 panel
Clearly marked terminal blocks, wire management channels and a disconnect-style Slo-Blo fuse (3A @ 250 VAC) with a replacement fuse included. The wiring diagram is in the door, and all inputs and outputs are tested in the factory.
C1050: Local digital sensor
The INT port connects a Prolon digital temperature sensor, and the controller supplies 24 VAC to power it.
M2000: Up to 8 occupancy states
Can receive up to 8 different occupancy states from an NC2000, and outputs can act on any local input or on network data.
Reflash to another program
Each controller keeps its full functionality, including the ability to reflash into a different controller program. Wiring diagrams are available free at proloncontrols.com.
ZOT Supply is an authorized distributor of Prolon products.
Technical Specifications
| Panel | |
|---|---|
| Controllers | Prolon C1050, Single-Zone Heatpump Controller program + Prolon M2000, FlexIO Controller program |
| Supply | 24 VAC ±10%, 50/60 Hz, Class 2 |
| Overcurrent Protection | Disconnect-style Slo-Blo fuse (3A @ 250 VAC), with additional replacement fuse included |
| Enclosure | NEMA 1 |
| Panel Dimensions | 16.25 in. W x 20.25 in. H x 6.25 in. D (413 mm W x 514 mm H x 159 mm D) |
| Weight | 38 lbs (17.25 kg) |
| Isolation Relays | 17A @ 277 VAC on all digital outputs (C1050 = 4, M2000 = 5) |
| Network Nodes | Stand-alone or networked (up to 127 nodes); this panel contains 2 nodes |
| Environment | -4 to 122 °F (-20 to 50 °C), non-condensing |
| Panel Certification | Complete panel is UL certified |
| Certification | UL916 Energy Management Equipment, CAN/CSA-C22.2, RoHS, FCC part 15: 2012 class B |
| C1050 Controller Hardware | |
| Power | 2 VA (consumption), 32 VA (input) |
| Inputs | 4 configurable inputs with selectable functions (outside temp / return temp / supply temp / water intake temp / night setback / proof of fan / alarm) |
| Digital Outputs | 4 triac outputs, 10-30 VAC source, 300 mA max (resettable fuse) |
| Analog Outputs | 1 output 0-10 VDC / 2-10 VDC / 0-5 VDC, 40 mA max (resettable fuse) |
| Indication Lights (LED) | State of each output / Communication / Power / State of microprocessor |
| Casing | Molded ABS, UL94-HB |
| Communication | Modbus RTU (RS485) up to 127 nodes |
| Baud Rates | 9600, 19200, 38400, 57600, 76800, 115200 |
| Connection | Removable screw-type terminal blocks (16 AWG max) |
| Single-Zone Heatpump Controller Program | |
| Program | Single-Zone Heatpump Controller |
| Application | Operates residential or commercial heatpump equipment using PI control loops as a standalone controller that relies on the demand from a local sensor rather than acting as a master to zone controllers |
| Program Inputs | 4 configurable inputs with selectable functions (outside temp / return temp / supply temp / water intake temp / night setback / proof of fan / alarm); INT port connects a Prolon digital temperature sensor, powered at 24 VAC |
| Program Outputs | 4 triac outputs, all set to SOURCE mode because they share a single source supply (the equipment transformer), 300 mA max (resettable fuse); analog output: 1 output 0-10 VDC / 2-10 VDC / 0-5 VDC |
| M2000 Controller Hardware | |
| Power | 5 VA (consumption), 40 VA (input) |
| Inputs | 9 analog inputs with individually configurable signal ranges (thermistor, dry contact, 4-20mA, 0-20 mA, 0-5 VDC, 1-5 VDC, 0.5-4.5 VDC) |
| Digital Outputs | 5 triac outputs, 10-30 VAC source, 300 mA max (resettable fuse) |
| Analog Outputs | 3 x 0-10 VDC outputs, 40 mA max |
| Indication Lights (LED) | State of each output / Communication / Power / State of microprocessor |
| Casing | Molded ABS, UL94-HB |
| Communication | Modbus RTU (RS485), up to 127 nodes |
| Baud Rates | 9600, 19200, 38400, 57600, 76800, 115200 |
| Connection | Removable screw-type terminal blocks (16 AWG max) and RJ45 modular jacks |
| FlexIO Controller Program | |
| Program | FlexIO Controller |
| Application | Is a general purpose HVAC controller whose inputs and outputs can be individually configured for applications not covered by a dedicated Prolon program |
| Program Inputs | 9 analog inputs with individually configurable signal ranges (thermistor, dry contact, 4-20mA, 0-5 VDC, 1-5 VDC, 0.5-4.5 VDC) |
| Program Outputs | 5 triac outputs; 3 x 0-10 VDC analog outputs, 40 mA max |
Documentation
Frequently Asked Questions
What is the Prolon PL-PN2-4H-7F?
A pre-wired two controller panel built with a Prolon C1050 Single-Zone Heat Pump Controller and a Prolon M2000 FlexIO Controller, in a UL listed NEMA 1 enclosure with 17A isolation relays on all digital outputs.
What does the C1050 single-zone heatpump program control?
It operates residential or commercial heatpump equipment using PI control loops as a standalone controller that relies on the demand from a local sensor rather than acting as a master to zone controllers. Strategies include unoccupied mode settings, morning warm-up and supply air pre-heating.
What does the M2000 flexio program control?
It is a general purpose HVAC controller whose inputs and outputs can be individually configured for applications not covered by a dedicated Prolon program. Strategies include ON/OFF, PI loop, and direct or reverse acting output logic, output interlocks and overrides based on outside temperature and/or occupancy.
What power does the panel require?
24 VAC ±10%, 50/60 Hz, Class 2; the C1050 draws 2 VA (consumption), 32 VA (input) and the M2000 draws 5 VA (consumption), 40 VA (input).
Can the two controllers serve different equipment?
Yes. The controllers need not be related in function and may each serve completely different sequences from separate power sources.
Are the outputs isolated and protected?
Yes. Every digital output is isolated by a relay rated 17A @ 277 VAC built into the panel, and the panel has a disconnect-style Slo-Blo fuse (3A @ 250 VAC) with a replacement fuse included.
What size is the PL-PN2-4H-7F panel?
16.25 in. W x 20.25 in. H x 6.25 in. D (413 mm W x 514 mm H x 159 mm D), and it weighs 38 lbs (17.25 kg).
How are the C1050 digital outputs wired?
On the C1050 heat pump program, all triac outputs are set to SOURCE mode because they share a single source supply, the equipment transformer.
- Panel Type:
- Dual Controller Panel
- Display:
- No Display
- Controller Type:
- Heat Pump
- Controller Type:
- FlexIO
- Communication:
- Modbus RTU (RS485)
