Carrier 17EX54007903 PLC Module
The Carrier 17EX54007903 is a programmable logic controller module designed specifically for Carrier HVAC systems, including chillers, air‑handling units, and rooftop packages. This module integrates the core control logic, I/O processing, and communication functions necessary to manage the refrigeration cycle, fans, pumps, and safety interlocks in large commercial and industrial cooling systems. It is part of Carrier’s advanced control platform, often used in conjunction with other modules such as the CESR131124‑03 and CEDP121036‑16.
The module features a ruggedized enclosure suitable for panel mounting in machine rooms or control cabinets. It offers a mix of digital and analog inputs/outputs, temperature sensor inputs (thermistors or RTDs), and communication ports (RS‑485, Ethernet) for integration with building management systems. The control logic is pre‑programmed with standard Carrier algorithms but is customizable via a dedicated software tool.
Technical Specifications
Model reference: 17EX54007903 (also associated with CESR131124-03)
Processor: 32‑bit RISC microcontroller
Digital inputs: 8 (24 V AC/DC, optically isolated)
Digital outputs: 8 (relay contacts, 2 A at 250 V AC)
Analog inputs: 4 (configurable for 0‑10 V, 4‑20 mA, or thermistor)
Analog outputs: 2 (0‑10 V or 4‑20 mA)
Temperature sensor support: Direct connection to NTC thermistor or RTD (PT100)
Communication ports: 1 x RS‑485 (Modbus RTU), 1 x Ethernet (Modbus TCP)
Program memory: 512 KB FLASH, 64 KB RAM
Power supply: 24 V DC (18‑30 V DC), 200 mA
Real‑time clock: Yes, with battery backup
Operating temperature: -10°C to +60°C
Protection class: IP20
Certifications: CE, UL, RoHS
Functional Capabilities
HVAC‑specific algorithms: Built‑in PID control, compressor staging, and defrost cycles optimized for Carrier equipment.
Alarm management: The module monitors critical parameters (pressure, temperature, current) and generates alarms for fault conditions (high discharge pressure, low suction temperature, etc.).
Energy optimization: Adaptive control algorithms adjust setpoints based on load and ambient conditions to minimize energy consumption.
Remote monitoring: The Ethernet port allows connection to a building management system or cloud platform for remote diagnostics and performance analysis.
Typical Applications
Centrifugal and screw chillers: Control of the refrigerant circuit, oil management, and capacity control.
Air‑handling units: Temperature and humidity control with economizer functionality.
Heat pumps: Reversing valve control and defrost management.
Industrial cooling systems: Process water cooling with pump control.
Installation and Configuration
Mount the module on a DIN rail inside the control panel. Connect the power supply, field wiring to the I/O terminals, and communication cables. The module’s configuration is performed using Carrier’s service software, which allows parameter setting for sensor types, setpoints, and control modes. The software can also log historical data for trend analysis. The module features LED indicators for power, communication, and fault status, aiding in commissioning and troubleshooting.
System Integration
The 17EX54007903 can operate standalone or as a node in a larger Carrier control network. It supports peer‑to‑peer communication with other modules, allowing coordinated control of multiple chillers or ancillary equipment. It also integrates with third‑party systems via Modbus, making it suitable for retrofitting into existing BMS infrastructures.
Compliance and Environment
The module meets the requirements of EN 61000‑6‑2 (immunity) and EN 61000‑6‑4 (emissions). It is RoHS compliant and carries the CE mark for European use. It is designed for indoor installation in pollution degree 2 environments.
Conclusion
The Carrier 17EX54007903 PLC module delivers robust, HVAC‑optimized control for demanding cooling applications. Its flexible I/O, communication options, and pre‑engineered control logic simplify system design and enhance operational reliability.
