Specifications on this page are taken from the Prolon Boiler Controller datasheet, REV 7.3.0 / PL-DATA-C1050BLR-C/F-EN.
The PL-C1050-BLR runs a hydronic boiler plant: it resets supply water temperature against outside air, stages the boilers, and manages the pumps. PI control loops hold the supply water setpoint rather than bouncing the boiler on and off around it.
It handles two boiler stages, which can be two boilers or one two-stage boiler, or a single modulating boiler with an optional backup stage. Lead-lag sequences are available for both the pumps and the boilers so runtime spreads evenly across the plant.
Pump activity can follow outside temperature, a call for heat, or both, and a configurable pump exercise sequence can run the pumps during extended periods of inactivity. An optional three-way valve sequence is included.
Best For
- Boiler systems with up to 2 stages, or 1 modulating boiler with a backup stage
- Loops needing supply water setpoint reset from outside temperature
- Plants using pump and boiler lead-lag, or an optional three-way valve sequence
Key Features
Outdoor reset of supply water
Supply water setpoint resets based on outside temperature, and can be offset by a network-received demand or occupancy state.
Two boiler stages or one modulating boiler
Controls up to 2 boiler stages, being multiple boilers or a single multistage boiler, or 1 modulating boiler with an optional backup stage.
Pump and boiler lead-lag
Various lead-lag sequences are available for both the pumps and the boilers.
Pump exercise sequence
Configurable pump exercise sequence for extended periods of inactivity.
Optional three-way valve control
An optional control sequence for a three-way valve is included; the analog output serves the valve.
Protected outputs
All 4 digital outputs and the analog output are protected by resettable fuses.
Technical Specifications
| Specification | PL-C1050-BLR Value |
|---|---|
| Supply | 24 VAC ±10%, 50/60 Hz, Class 2 |
| Power | 2 VA (consumption), 32 VA (input) |
| Inputs |
|
| Digital Outputs | 4 triac outputs, 10-30 VAC source or sink, 300 mA max (resettable fuse) |
| Analog Output | 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 |
| Microprocessor | PIC18F6722, 8 bits, 40 MHz, 128 KB FLASH memory |
| 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) |
| Dimensions | 6.2 in x 5.2 in x 2.5 in (157 mm x 132 mm x 64 mm) |
| Weight | 0.85 lbs (0.39 kg) |
| Environment | -4 to 122 °F (-20 to 50 °C), non-condensing |
| Certification | UL916 Energy Management Equipment, CAN/CSA-C22.2, RoHS, FCC part 15: 2012 class B |
Documentation
Frequently Asked Questions
- Controller Type:
- Boiler
- Digital Outputs:
- 4
- Analog Outputs:
- 1
- Analog Inputs:
- 3
- Digital Inputs:
- 1
- Communication:
- Modbus RTU (RS485)
