Controller 1
C1050 Chiller
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-PN2-4D-7F is a pre-wired, UL listed NEMA 1 two controller panel built with a Prolon C1050 Chiller 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 Chiller Controller operates air cooled and water cooled chillers with up to three stages, as well as the associated system pumps. 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-CHL Controller datasheet REV 7.3.2 / PL-DATA-C1050CHL-C/F-EN; Prolon PL-M2000-FLX Controller datasheet REV 7.3.0 / PL-DATA-M2000FLX-C/F-EN; Prolon C1050 Chiller Controller Hardware Guide REV 7.3.4; 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
- Air cooled or water cooled chillers up to 3 stages
- 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: Up to 3 chiller stages
Regulates chilled water supply temperature on air cooled and water cooled chillers with up to three stages and their system pumps.
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, Chiller 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 | Entering water temperature / Outside air temperature: thermistor 10K; Return Water: 10 K thermistor; Supply Water: 10 K thermistor; Proof of pump: dry contact |
| Digital Outputs | 4 triac outputs, 10-30 VAC source or sink, 300 mA max (resettable fuse) |
| Analog Outputs | 1 output 0-10 VDC / 2-10 VDC / 0-5 VDC, 40 mA max (resettable fuse) for the valve |
| Indication Lights (LED) | State of each output / Communication / Supply / 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) |
| Chiller Controller Program | |
| Program | Chiller Controller |
| Application | Operates air cooled and water cooled chillers with up to three stages, as well as the associated system pumps |
| Program Inputs | Entering condenser water / outside air, return water and supply water: 10K thermistor; proof of pump: dry contact |
| Program Outputs | 4 triac outputs; analog output: 1 output 0-10 VDC / 2-10 VDC / 0-5 VDC for the valve |
| 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-PN2-4D-7F?
A pre-wired two controller panel built with a Prolon C1050 Chiller 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 chiller program control?
It operates air cooled and water cooled chillers with up to three stages, as well as the associated system pumps. Strategies include outside temperature reset scales, lead-lag sequences and pump exercise intervals.
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-PN2-4D-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).
- Panel Type:
- Dual Controller Panel
- Display:
- No Display
- Controller Type:
- Chiller
- Controller Type:
- FlexIO
- Communication:
- Modbus RTU (RS485)
