Controller 1
M2000 FCU
Controller 2
M2000 FCU
Supply
24 VAC, Class 2
Relays
17A @ 277 VAC
Protocol
Modbus RTU (RS485)
Panel
NEMA 1, UL listed
Overview
The Prolon PL-PN2-7E-7E is a pre-wired, UL listed NEMA 1 two controller panel built with two Prolon M2000 Fan Coil Unit controllers. Isolation relays rated 17A @ 277 VAC on all digital outputs, overcurrent fuse protection and clearly marked terminal blocks come factory wired.
Each M2000 Fan Coil Unit Controller operates two-pipe or four-pipe hydronic fan coil systems using PI (proportional-integral) control loops. 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-M2000-FCU Controller datasheet REV 7.4.0 / PL-DATA-M2000FCU-C/F-EN; Prolon M2000 Fan Coil Controller Hardware Guide REV 7.4.0; Prolon Two Controller Panel product page (proloncontrols.com) retrieved 2026-09-24. Reviewed September 2026.
Best For
- Four-pipe fan coils with separate heat and cool valves
- 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.
M2000: Onboard real-time clock
With no Prolon network present, the M2000 fan coil program determines its occupancy state from its on-board real-time clock.
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.
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 | |
|---|---|
| Controllers | 2 x Prolon M2000, Fan Coil Unit 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 |
| M2000 Controller Hardware (each of 2) | |
| Power | 5 VA (consumption), 40 VA (input) |
| Inputs | 8 configurable universal inputs (outside temp /hot and cold-water supply temps / supply air / leak alarm / proof of fan / room setpoint / zone temperature / Alarm input). Input signals (10k-3 thermistor / dry contact) |
| Digital Outputs | 5 triac outputs, 10-30 VAC source, 300 mA max (self-resetting fuse) |
| Analog Outputs | 3 x 0-10 VDC outputs, 40 mA max (selfresetting 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 (max 16 AWG) and RJ45 modular jacks |
| Fan Coil Unit Controller Program | |
| Program | Fan Coil Unit Controller |
| Application | Operates two-pipe or four-pipe hydronic fan coil systems using PI (proportional-integral) control loops |
| Program Inputs | 8 analog inputs: outside temp, hot supply water temp, supply air temp, cold supply water, zone air temp, zone setpoint, fan proof and alarm (thermistor / dry contact) |
| Program Outputs | 5 triac outputs (fan speeds, valves, reheat); 3 x 0-10 VDC analog outputs, 40 mA max (resettable fuse) |
Documentation
Frequently Asked Questions
What is the Prolon PL-PN2-7E-7E?
A pre-wired two controller panel built with two Prolon M2000 Fan Coil Unit controllers, in a UL listed NEMA 1 enclosure with 17A isolation relays on all digital outputs.
What does the M2000 fan coil unit program control?
It operates two-pipe or four-pipe hydronic fan coil systems using PI (proportional-integral) control loops. Strategies include two-pipe automatic mode change based on supply water temperature, periodic purge cycles and secondary backup heat control.
What power does the panel require?
24 VAC ±10%, 50/60 Hz, Class 2; each 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-PN2-7E-7E 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:
- Fan Coil
- Communication:
- Modbus RTU (RS485)
