The Yokogawa AAB841 is a non-isolated analog input and output module designed for distributed control system architectures. This unit provides eight input and eight output channels within a single compact form factor. It delivers reliable signal conditioning for continuous process automation applications.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Analog Input/Output Module |
| Manufacturer | Yokogawa |
| Model Number | AAB841 |
| Channel Configuration | 8 inputs / 8 outputs (non-isolated) |
| Input Signal Range | 1–5 V DC |
| Output Signal Range | 4–20 mA |
| Resolution | 16-bit |
| Accuracy | ±0.2% of full scale |
| Response Time | <50 ms per channel |
| Power Consumption | 5 W typical |
| Weight | 320 g |
| Dimensions (H × W × D) | 128 mm × 45 mm × 120 mm |
| Mounting Type | DIN rail or panel mount |
| Termination | Screw terminal blocks |
| Operating Temperature | -20 °C to +70 °C |
| Storage Temperature | -40 °C to +85 °C |
| Humidity Range | 5% to 95% RH (non-condensing) |
| Certifications | CE, UL, CSA |
| Included Components | One module, one connector set, one manual |
Eight Inputs and Eight Outputs in One Unit
The AAB841 combines sixteen total channels in a single wide-body enclosure. You therefore reduce rack space requirements compared to separate I/O modules. Each input accepts standard 1–5 V signals from field transmitters. Each output simultaneously drives 4–20 mA loops for final control elements.
16-Bit Resolution for Precision Applications
Yokogawa equipped this module with 16-bit analog-to-digital and digital-to-analog conversion. This resolution yields fine granularity across the entire signal range. Consequently, you achieve ±0.2 percent accuracy without external signal conditioners. The AAB841 suits critical loops requiring tight setpoint adherence.
Fast Response Without Processing Delay
You benefit from less than 50 milliseconds response time per channel. The module updates all inputs and outputs within a single scan cycle. Therefore, your control strategy receives fresh process data continuously. This speed supports pump, fan, and heater modulation without observable lag.
Robust Environmental Specifications
The AAB841 operates reliably from -20 °C to +70 °C ambient temperature. You can install it in non-conditioned electrical rooms and field cabinets. Non-condensing humidity tolerance reaches 95 percent. The conformal-coated circuit board resists corrosive industrial atmospheres.
Simple Integration and Termination
This module mounts directly on standard DIN rails or panel backplates. Removable screw terminal blocks simplify wiring during commissioning and maintenance. You connect field instruments without special tools or adapters. The AAB841 integrates seamlessly with Yokogawa Centum VP and ProSafe-RS systems.
Energy Storage and Component Longevity
The AAB841 contains no internal batteries or supercapacitors. You therefore eliminate periodic replacement maintenance. Solid-state components provide decades of continuous service life. This design choice significantly reduces total cost of ownership.
Details
| Weight | 0.7 kg |
|---|---|
| Dimensions | 2.5 × 20.3 × 15.2 mm |
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