Product Overview
The Honeywell 900A01-0202 Universal Analog Input (AI) module is designed for precise signal acquisition in industrial control systems. This module supports up to 8 user-configurable inputs per point for thermocouple, RTD, resistance, voltage, millivolt, and milliampere signals. With point-to-point isolation and backplane isolation, the Honeywell 900A01-0202 ensures reliable data integrity in harsh environments. The module performs analog-to-digital conversion in synchronization with CPU control execution, eliminating data interchange latency. All analog input modules process in parallel, so adding modules does not increase scan time. A green blinking status LED indicates scanning activity, while a red LED signals diagnostics. The user-selectable BURNOUT value per channel and warning signals for thermocouple inputs help prevent sensor failures before they occur.
Technical Specifications
The Honeywell 900A01-0202 offers a comprehensive set of specifications that ensure high performance and reliability. Below are the key parameters from the product datasheet:
| Parameter |
Specification |
| Inputs per module |
8 (isolated) |
| Input types |
mV, V, T/C, RTD, ohms, mA |
| Input Impedance |
10 megohms for T/C and mV; >1 megohm for volts; 250 ohms for mA |
| Galvanic Input Isolation |
400 VDC point-to-point, 1KV VDC to logic |
| Noise Rejection |
Series Mode >60dB; Common Mode >130dB at 120VAC |
| Accuracy |
±0.1% of range (±0.2% for 0V-10V and -10V to 10V) |
| A/D Resolution |
15 Bits |
| Update rate |
500ms (per module) |
| Long-term Stability |
0.1% per year |
These specifications make the Honeywell 900A01-0202 an excellent choice for applications requiring high accuracy and noise immunity.
Industry Applications
The Honeywell 900A01-0202 is ideal for process industries such as oil and gas, chemical processing, and power generation. In a refinery, the module can monitor temperature from multiple thermocouples and RTDs, providing critical data for distillation columns. In a chemical plant, the configurable input types allow connection of various sensors for pressure, flow, and temperature without additional signal conditioners. The diagnostic features, including burnout detection and warning signals, reduce unplanned downtime by alerting maintenance personnel to potential sensor failures before they cause production stoppages. This capability directly improves return on investment (ROI) by lowering maintenance costs and increasing overall equipment effectiveness.
Compatibility & Integration
The Honeywell 900A01-0202 integrates seamlessly with Honeywell control systems that support universal analog input modules. The module uses synchronous A/D conversion with the CPU, ensuring no data latency. It is designed for backplane mounting and communicates over the system bus. No additional accessories are required for basic operation, but the user must ensure the backplane supports the module's power and communication requirements. Consult the system documentation for specific compatibility with older or newer generations of controllers.
Selection Guide & Purchasing Advice
When selecting the Honeywell 900A01-0202, verify that your system's backplane can accommodate the module and that the input types match your sensor outputs. The module is factory-calibrated with redundant calibration data stored in non-volatile memory, so no field calibration is necessary initially. For replacement or upgrades, ensure the existing wiring respects the isolation and impedance requirements. UBEST Automation offers this genuine Honeywell module with fast shipping and technical support. For more information, contact ubest101 directly to confirm availability and lead times.