Yokogawa designed the AAR181 as a high-performance analog input module for CENTUM VP and CENTUM CS 3000 platforms. This unit accepts standard field signals from transmitters, sensors, and other process instruments. It converts analog measurements into digital data for precise monitoring and control.
Key Technical Specifications
The AAR181 module features a compact housing suitable for DIN rail or panel mounting. It measures 107 millimeters in height and 130 millimeters in depth. This unit weighs approximately 0.3 kilograms for flexible installation.
| Specification | Detail |
|---|---|
| Model Number | AAR181 |
| Module Type | Analog Input Module |
| Input Channels | 8 isolated analog input channels |
| Input Signal | 4 to 20 mA DC |
| Input Impedance | 250 ohms |
| Accuracy | ±0.1 percent of span |
| Resolution | 14 bits |
| Isolation | 500 V AC between channels and system |
| Data Update Period | 1 second |
| Transmitter Power | 24 V DC ±10 percent (30 mA max per channel) |
| Dimensions | 107 x 33 x 130 mm (H x W x D) |
| Weight | 0.3 kg |
Moving to connectivity, this module provides eight isolated channels for 4-20 mA field devices. You connect two-wire transmitters directly to the terminal blocks with integrated loop power. Consequently, the design simplifies wiring by eliminating external power supplies.
Design and Application Focus
Engineers select the AAR181 for its high-accuracy signal acquisition in demanding process environments. The design includes 500 V AC isolation to protect the system from electrical noise and ground loops. Furthermore, the module provides 24 V DC transmitter power for each channel to support two-wire devices. This feature reduces installation complexity and cabinet space requirements.
Unlike standard analog input cards, this unit integrates seamlessly with CENTUM VP architecture. You can configure each channel independently for specific scaling and alarm settings. Additionally, the 14-bit resolution delivers precise measurement for critical process variables such as pressure, flow, and level.
Details
| Weight | 0.7 kg |
|---|---|
| Dimensions | 2.5 × 20.3 × 15.2 mm |
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