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The Omron C200H-AD003 is an 8-channel analog input module designed for use with Omron’s C200H and C200HS programmable logic controller (PLC) systems. As a key component in legacy industrial automation architectures, the Omron C200H-AD003 enables the acquisition and conversion of real-world analog signals—such as those from temperature sensors, pressure transmitters, flow meters, and position feedback devices—into digital data that can be processed by the PLC CPU for monitoring, control, and alarming. This module supports both voltage (±10 V) and current (0–20 mA or 4–20 mA) input ranges on a per-channel basis, offering flexibility across diverse process instrumentation.
Positioned within Omron’s widely deployed C-series modular I/O platform, the Omron C200H-AD003 maintains full mechanical and electrical compatibility with existing C200H backplanes, allowing seamless integration into brownfield systems without requiring chassis upgrades. Despite being part of a legacy product line, the Omron C200H-AD003 remains in high demand due to its reliability, ease of replacement, and continued support in industries such as water treatment, packaging, material handling, and small-scale process manufacturing where C200H systems remain operational. Its robust design, optical isolation, and stable performance under electrical noise make it a dependable choice for long-life industrial applications.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | C200H-AD003 |
| Manufacturer | Omron |
| Product Type | Analog Input Module for C200H/C200HS PLC |
| Number of Channels | 8 |
| Input Types | Voltage: ±10 V; Current: 0–20 mA (4–20 mA usable) |
| Input Impedance | Voltage: 1 MΩ; Current: 250 Ω |
| Resolution | 12 bits (4,096 counts) |
| Conversion Time | Approx. 10 ms per channel (80 ms total scan) |
| Isolation | Optical isolation between field side and backplane (500 VAC for 1 min) |
| Power Consumption | 3.5 W (from C200H backplane) |
| Mounting Method | Snap-in to C200H I/O rack (e.g., C200H-BCxxx) |
| Operating Temperature | 0°C to +55°C |
| Certifications | CE, UL, CSA |
Main Features and Advantages
Flexible dual-range analog input capability: Each of the eight channels on the Omron C200H-AD003 can be independently configured via internal DIP switches to accept either ±10 V voltage signals or 0–20 mA current loops—making it compatible with a wide array of field instruments without external signal conditioners. This versatility simplifies system design in mixed-sensor environments, such as a packaging line using both potentiometric position sensors (voltage) and 4–20 mA pressure transducers.
High-resolution signal conversion with noise immunity: The Omron C200H-AD003 provides 12-bit analog-to-digital conversion, delivering 4,096 discrete values per channel for precise representation of process variables. Combined with optical isolation between the field wiring and the PLC backplane, this ensures reliable operation even in electrically noisy settings like motor control panels or welding stations. The module’s common-mode rejection and differential input handling further reduce susceptibility to ground loops and EMI.
Seamless integration into legacy C200H systems: Designed specifically for the C200H and C200HS platforms, the Omron C200H-AD003 requires no special adapters or firmware updates. It occupies a single I/O slot and automatically maps its input data to the PLC’s memory area (typically DM or IR words) based on its physical slot position—eliminating complex configuration. This plug-and-play compatibility makes it ideal for maintenance replacements or capacity expansions in aging but still-functional automation lines.
Long-term availability and industrial ruggedness: Although the C200H series has been succeeded by newer Omron platforms (e.g., CJ2M, NX), the Omron C200H-AD003 continues to be supported through extended lifecycle programs and third-party stocking. Its conformal-coated PCB and robust terminal blocks withstand vibration, humidity, and temperature fluctuations common in factory environments. For facilities managing decades-old machinery, the Omron C200H-AD003 represents a cost-effective way to sustain operations without full system migration.
Application Field
The Omron C200H-AD003 is commonly found in industrial facilities where Omron C200H-based control systems remain in service, particularly in regions or sectors with long equipment lifecycles. In municipal water and wastewater treatment plants, the Omron C200H-AD003 acquires analog signals from level sensors, pH meters, and flow transmitters to regulate pump speeds and chemical dosing—ensuring compliance with environmental standards while minimizing manual oversight.
In food and beverage or pharmaceutical packaging lines, the Omron C200H-AD003 monitors fill levels, web tension, and temperature in ovens or chillers via 4–20 mA transducers, enabling closed-loop control within legacy PLC logic. Similarly, in small-scale plastics or rubber molding machines, it reads hydraulic pressure and barrel temperature to maintain consistent cycle quality. Material handling systems—such as automated warehouses or conveyor sorters—use the Omron C200H-AD003 to process analog feedback from load cells or position encoders for weight verification or alignment correction.
Even in educational and training labs, the Omron C200H-AD003 serves as a practical teaching tool for analog I/O principles due to its straightforward wiring and transparent data mapping. Across all these applications, the Omron C200H-AD003 delivers dependable analog interfacing that bridges the gap between physical processes and digital control—proving that well-engineered legacy components continue to add value long after their initial deployment.
Related Products
C200H-DA002: 4-channel analog output module; complements C200H-AD003 for full closed-loop control
C200H-IA222: 16-point AC input module; used alongside C200H-AD003 for mixed digital/analog systems
C200H-OA222: 16-point AC output module; pairs with C200H-AD003 in machine control panels
C200HS-CPU21-E: CPU unit for C200HS rack; required to host C200H-AD003 modules
C200H-BC101-V1: 10-slot I/O backplane; standard mounting base for C200H-AD003
CJ1W-AD081-V1: Successor analog input module for CJ-series PLCs; higher speed and resolution than C200H-AD003
C200H-AD001: Earlier 4-channel version; C200H-AD003 doubles channel count in same footprint
CX-Programmer: Omron software for programming C200H systems; used to read C200H-AD003 input data
Installation and Maintenance
Pre-installation preparation: Before installing the Omron C200H-AD003, ensure the target C200H or C200HS rack is powered off and de-energized. Verify that the selected I/O slot is vacant and that the backplane model (e.g., C200H-BC101) supports analog modules. Set the internal DIP switches on the Omron C200H-AD003 according to your sensor types—voltage or current per channel—as these cannot be changed via software. Use shielded twisted-pair cables for all field connections, grounding the shield at the controller end only to prevent ground loops. Confirm that signal sources are within the specified range (±10 V or 0–20 mA) and that loop-powered transmitters have adequate supply voltage.
Maintenance recommendations: The Omron C200H-AD003 contains no user-serviceable parts and requires no periodic calibration. However, during routine plant inspections, check terminal tightness and look for signs of overheating or corrosion. If erratic readings occur, verify DIP switch settings and measure actual field signals with a multimeter to isolate sensor vs. module issues. The module’s front-panel LEDs indicate power and operational status—absence of power LED suggests backplane communication failure. Always keep a spare Omron C200H-AD003 on hand, as lead times for legacy modules can be unpredictable. Store spares in anti-static bags at room temperature and low humidity to preserve long-term reliability.
