Controller
M2000
Program
Chiller
Supply
24 VAC, Class 2
Outputs
5 DO / 3 AO
Protocol
Modbus RTU (RS485)
Panel
NEMA 1, UL508A
Overview
The Prolon PL-PN1-7D is a pre-wired, UL508A certified NEMA 1 control panel built with one Prolon M2000 controller running the Chiller Controller program, which operates air cooled and water cooled chillers with up to four stages, as well as the associated system pumps. Isolation relays on all digital outputs, overcurrent fuse protection and clearly marked terminal blocks come factory wired.
Program strategies include outside temperature reset scales, lead-lag sequences and pump exercise intervals. The panel contains 1 Modbus RTU (RS485) node and runs stand-alone or on a Prolon network of up to 127 nodes.
Specifications per Prolon Pre-Wired One Controller Panel datasheet PL-DATA-PANEL1CON-EN-V1; Prolon PL-M2000-CHL Controller datasheet REV 7.3.4 / PL-DATA-M2000CHL-C/F-EN; Prolon M2000 Chiller Controller Hardware Guide REV 7.3.4; Prolon One Controller Panel product page (proloncontrols.com) retrieved 2026-09-22. Reviewed September 2026.
Best For
- Air cooled or water cooled chillers up to 4 stages
- Chiller plants that monitor condenser water and water pressure
- Lead-lag sequences on chiller stages and pumps
Warranty
For warranty coverage on this Prolon panel, contact ZOT Supply at sales@zotsupply.com or 855-825-2811.
Key Features
Up to 4 chiller stages
Regulates chilled water supply temperature on air cooled and water cooled chillers with up to four stages, with condenser water and water pressure inputs.
17A isolation relays
Every digital output is isolated by a relay rated 17A @ 277 VAC built into the panel (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 panel wiring diagram is in the door, and all inputs and outputs are tested in the factory.
Reflash to another program
The M2000 keeps its full functionality, including the ability to reflash into a different controller program. Wiring diagrams are available free at proloncontrols.com.
Manual/off/auto switches
A manual/off/auto switch for each of the eight outputs of the M2000 controller.
Free Prolon Focus software
Remote monitoring and configuration with free Prolon Focus software, stand-alone or networked up to 127 nodes.
ZOT Supply is an authorized distributor of Prolon products.
Technical Specifications
| Panel | |
|---|---|
| Controller | Prolon M2000, Chiller 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 | 12.25 in. W x 16.25 in. H x 6.25 in. D |
| Weight | 23 lbs (10.5 kg) |
| Isolation Relays | 17A @ 277 VAC on all digital outputs (C1050 = 4, M2000 = 5) |
| Environment | -4 to 122 °F (-20 to 50 °C), non-condensing |
| Panel Certification | Complete panel is UL508A certified |
| Certification | UL916 Energy Management Equipment, CAN/CSA-C22.2, RoHS, FCC part 15: 2012 class B |
| M2000 Controller Hardware | |
| Power | 5 VA (consumption), 40 VA (input) |
| Inputs | 9 analog inputs (outside temp / supply water temp / return water temp / dry contacts for proof of pumps, entering condenser water temp, leaving condenser water temp, water pressure and alarm). Input signals (thermistor / dry contact / 4-20mA / 0-5 VDC) individually configurable for each input |
| 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 (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) and RJ45 modular jacks |
| Chiller Controller Program | |
| Program | Chiller Controller |
| Application | Operates air cooled and water cooled chillers with up to four stages, as well as the associated system pumps |
| Program Inputs | 9 analog inputs: outside temp, supply water temp, return water temp, proof of pumps (dry contact), entering condenser water temp, leaving condenser water temp, water pressure and alarm |
| Program Outputs | 5 triac outputs; 3 x 0-10 VDC analog outputs, 40 mA max (resettable fuse) |
Documentation
Frequently Asked Questions
What is the Prolon PL-PN1-7D?
A pre-wired one controller panel built with a Prolon M2000 controller running the Chiller Controller program, in a UL508A certified NEMA 1 enclosure with isolation relays on all digital outputs.
What does the chiller program control?
It operates air cooled and water cooled chillers with up to four stages, as well as the associated system pumps. Strategies include outside temperature reset scales, lead-lag sequences and pump exercise intervals.
Which inputs does the PL-PN1-7D use?
9 analog inputs: outside temp, supply water temp, return water temp, proof of pumps (dry contact), entering condenser water temp, leaving condenser water temp, water pressure and alarm.
What power does the panel require?
24 VAC ±10%, 50/60 Hz, Class 2. The M2000 draws 5 VA (consumption), 40 VA (input).
Are the outputs isolated and protected?
Yes. Every digital output is isolated by a relay rated 17A @ 277 VAC built into the panel, the triac outputs are rated 300 mA max with resettable fuses, and the panel has a disconnect-style Slo-Blo fuse (3A @ 250 VAC) with a replacement fuse included.
How does the PL-PN1-7D communicate?
Modbus RTU (RS485), up to 127 nodes, at 9600 to 115200 baud. The panel contains 1 node and is configured with free Prolon Focus software.
What size is the PL-PN1-7D panel?
12.25 in. W x 16.25 in. H x 6.25 in. D, and it weighs 23 lbs (10.5 kg).
- Panel Type:
- Single Controler Panel
- Display:
- No Display
- Controller Type:
- Chiller
- Communication:
- Modbus RTU (RS485)
