Specifications on this page are taken from the Prolon Single-Zone Rooftop Controller datasheet, REV 7.3.0 / PL-DATA-C1050RTUS-C/F-EN.
The PL-C1050-RTUS is the single-zone version of the C1050 rooftop controller. It is designed for unitary systems that serve one space and are controlled from a single space temperature sensor, rather than a group of zones.
The sequence set covers preheating, constant cooling supply control and night setback, with PI loops on the control outputs. Configuration is done in software, locally or remotely.
Staging is the same as the multi-zone RTU: up to two heating stages and four cooling stages, or full modulation through the analog output.
Best For
- Unitary rooftop systems running from a single space temperature sensor
- Systems with up to 2 heating stages and 4 cooling stages, or full modulation
- Applications needing preheat, constant cooling supply control or night setback
Key Features
Built for single-zone unitary systems
Designed for unitary systems using a single space temperature sensor.
Two heating and four cooling stages
Controls up to 2 stages of heating and 4 stages of cooling, or full modulation.
Night setback and preheat
Preheating, constant cooling supply control and night setback are part of the standard sequence set.
PI control loops
Proportional-integral loops hold setpoint tighter than staged on/off control.
Configurable protection limits
Built-in protection sequences with configurable temperature limits and minimum delays.
Protected outputs
All 4 digital outputs and the analog output are protected by resettable fuses.
Technical Specifications
| Specification | PL-C1050-RTUS 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) |
| Indication Lights (LED) | State of each output / Communication / Power / 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:
- Rooftop
- Digital Outputs:
- 4
- Analog Outputs:
- 1
- Analog Inputs:
- 3
- Digital Inputs:
- 1
- Communication:
- Modbus RTU (RS485)
