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Product Introduction:
The Honeywell 900C51-0021 is a central Controller CPU module used within the HC900 Hybrid Control System, an advanced process and logic control platform tailored for hybrid applications that blend batch, continuous, and discrete processes. The C50 Controller, part of the HC900 C-Series, provides robust control processing, flexible I/O architecture, and powerful communication capabilities, making it ideal for industrial automation environments where performance and reliability are paramount.
As the core of the control system, this CPU handles real-time data processing, logic execution, communication with operator interfaces (HMIs), and system diagnostics. The 900C51-0021 is known for its compact size, high-speed performance, integrated Ethernet ports, and scalable architecture—supporting a range of demanding industrial and process applications.
Product Specifications
| Parameter | Specification |
|---|---|
| Product Name | HC900 C50 Controller CPU Module |
| Model Number | 900C51-0021 |
| System Platform | HC900 Hybrid Control System |
| CPU Type | C50 CPU, 32-bit RISC Processor |
| Memory | 10 MB Flash, 1 MB SRAM |
| Communication Ports | 1 × Ethernet 10/100 Mbps, 1 × RS-485, 1 × RS-232 |
| Protocols Supported | Modbus TCP/IP, Modbus RTU/ASCII, Ethernet/IP, Peer-to-Peer |
| Number of Supported I/O Points | Up to 512 local I/O points |
| Number of Loops/Function Blocks | Up to 100 analog loop function blocks, 200 logic blocks |
| Real-Time Clock | Integrated with battery backup |
| Redundancy Support | No (For redundant version, see 900C52 series) |
| Configuration Software | Hybrid Control Designer (HCD) |
| Status Indication | LED indicators for Run, Fault, Comm, and Power |
| Operating Temperature Range | 0°C to +60°C |
| Storage Temperature Range | -40°C to +85°C |
| Relative Humidity | 5% to 95% non-condensing |
| Certifications | CE, UL, cUL, CSA, FM, RoHS |
| Power Consumption | 7.0 W typical |
| Mounting | DIN rail mount |
| Dimensions (W × H × D) | 70 × 130 × 125 mm |
| Weight | 0.549 kg |
Product Applications
The Honeywell 900C51-0021 HC900 C50 CPU is ideal for:
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Industrial Furnace and Kiln Control
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Boiler Management Systems
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Water and Wastewater Treatment
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Pharmaceutical Batch Reactors
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Food and Beverage Production
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Pulp and Paper Processing
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HVAC and Energy Management Systems
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Chemical Mixing and Blending Systems
Its flexibility and wide I/O support make it suitable for applications that demand precise process control, recipe management, and data acquisition, with easy integration into supervisory and enterprise-level systems.
Product Advantages
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Compact Yet Powerful
Despite its small form factor, the C50 CPU offers impressive processing capabilities, supporting multiple function blocks and control loops. -
Versatile Communication Interfaces
Comes with integrated Ethernet and serial ports to interface with HMIs, SCADA, remote I/O, and third-party systems. -
Advanced Control Logic
Supports a blend of analog loop control, discrete logic, and sequence management, making it adaptable for hybrid applications. -
Graphical Configuration Tools
The Hybrid Control Designer (HCD) software provides a user-friendly drag-and-drop environment for fast development and deployment. -
Flexible I/O Expansion
Scalable to hundreds of I/O points, allowing system growth without architectural changes. -
Proven Reliability
Designed for harsh industrial conditions, the module has a long operational life and resistance to environmental stress. -
Integrated Diagnostics
Real-time status LEDs and software-based diagnostics aid in quick fault detection and resolution. -
Cost-Effective
Ideal for mid-range applications needing robust control without the cost and complexity of a full-scale DCS.
Frequently Asked Questions (FAQ)
-
What is the purpose of the Honeywell 900C51-0021 module?
It acts as the central processing unit for HC900 systems, executing control logic and managing I/O communication. -
How many I/O points can the C50 controller support?
It can support up to 512 local I/O points. -
Does the C50 CPU support redundancy?
No, it is a standalone controller. For redundancy, the C70 series or C60 with redundancy support should be used. -
Which protocols are supported by the Ethernet port?
It supports Modbus TCP/IP and peer-to-peer Ethernet/IP communications. -
Can the C50 CPU be used for both continuous and batch control?
Yes, it supports function blocks suitable for both types of control strategies. -
What software is used to program the C50 controller?
Honeywell’s Hybrid Control Designer (HCD) is used for configuration and programming. -
How is the module mounted?
It is mounted on a DIN rail within an HC900 system rack. -
Is the controller suitable for hazardous areas?
While the controller is industrial-grade, it should be installed in approved enclosures for hazardous environments. -
Can I connect third-party HMIs to the controller?
Yes, via Modbus TCP/IP or serial Modbus RTU protocols. -
What does the LED status indicators show?
They indicate the CPU’s operation status, including power, run mode, communication, and fault conditions.
Related Models (Same Series / Application Range)
| Model Number | Description | CPU Type | Redundancy | Max I/O Points | Weight (kg) |
|---|---|---|---|---|---|
| 900C50-0011 | HC900 C50 CPU, base version | C50 | No | 256 | 0.85 |
| 900C52-0001 | HC900 C70 CPU with redundancy support | C70 | Yes | 2048 | 0.90 |
| 900C51-0011 | HC900 C50 CPU, extended memory version | C50 | No | 512 | 0.85 |
| 900C53-0001 | HC900 C70 CPU, high capacity | C70 | Yes | 4096 | 1.00 |
| 900ENI-0101 | Ethernet Interface Module for HC900 | N/A | N/A | N/A | 0.60 |
| 900PM-0011 | Power Management Module for HC900 | N/A | N/A | N/A | 0.65 |
Popular Honeywell Modules (Same Brand, High Demand)
| Model Number | Description | Application | Signal Type | Weight (kg) |
|---|---|---|---|---|
| CC-TDIL01 | Digital Input Module for C300/Experion | Discrete Input Monitoring | Digital | 0.80 |
| CC-TAIX01 | Analog Input Module with Isolation | Analog Data Acquisition | Analog | 0.90 |
| CC-TDOD11 | Digital Output Module | Control Signal Output | Digital | 0.85 |
| MC-PAIH03 | HART Analog Input Module | Smart Transmitter Integration | Analog/HART | 1.00 |
| FC-TDOD51 | Field Termination Digital Output | Field Control Systems | Digital | 0.80 |
| CC-PUIO01 | Universal Input/Output Module | Mixed Analog & Digital | Mixed | 1.00 |
