Analog I/O Module | Yokogawa AAI835-H03 S3
Manufacturer: Yokogawa
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Part Number: AAI835-H03S3
Condition：New with Original Package
Product Type: Analog Input/Output Modules
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Country of Origin: Japan
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Yokogawa AAI835-H03 S3 Isolated Analog Input/Output Module
The Yokogawa AAI835-H03 S3, also cataloged as the AAI835 Isolated Analog Input/Output Module, operates as a dedicated hardware component for bi-directional 4-20 mA current signal conditioning and HART protocol pass-through within Yokogawa CENTUM VP and CENTUM CS DCS platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAI835-H03 S3 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.3 kg |
| Dimensions | 107.5 mm x 32.8 mm x 130.0 mm |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | Max. 360 mA at 5 VDC; 450 mA at 24 VDC |
| Channel Configuration | 4 Analog Inputs + 4 Analog Outputs |
| Signal Range | 4-20 mA DC (Inputs and Outputs) |
| Input Accuracy | +/-16 uA |
| Output Accuracy | +/-48 uA |
| Data Update Period | 10 ms |
| Temperature Drift | +/-16 uA / 10 deg C |
| Allowable Output Load | 0 to 750 ohm |
| Transmitter Loop Power | >= 15.0 VDC at 20 mA; <= 29.3 VDC at 0 mA |
| Withstand Voltage | 500 VAC for 1 minute |
| Environmental Rating | ISA Standard G3 Corrosion Protection |
HART Protocol & Channel Isolation Performance
The hardware integrates 4-20 mA HART loop protocol capability across all 4 input and 4 output channels, enabling continuous bi-directional digital data transfer for smart field instrument diagnostics and parameter management. Galvanic isolation across channels protects backplane processing logic from potential field surges and ground loop interference up to 500 VAC. Furthermore, internal transmitter loop power circuits maintain continuous DC power supply above 15.0 VDC at 20 mA for 2-wire devices, while output circuits actively drive load resistances up to 750 ohm.
Frequently Asked Questions
Q: How does the Style 3 (S3) revision impact hardware compatibility?
A: Style 3 (S3) incorporates upgraded thermal management circuits and extended component thermal ratings (-20 to +70 deg C). It maintains full backward functional and mechanical compatibility with existing Yokogawa CENTUM VP I/O baseplates.
Q: How does the G3 environmental option protect internal circuitry?
A: The G3 variant applies conformal coating to internal printed circuit boards to satisfy ISA Standard G3 specifications, resisting corrosion from airborne hydrogen sulfide, sulfur dioxide, and chlorine gases in severe process environments.
Q: Which field wiring interfaces connect directly to this module?
A: Technicians route external field wiring using pressure-clamp terminal blocks, dedicated KS1 interface cables, or 40-pin MIL connector cable assemblies tied to compatible Yokogawa terminal board units.
Field Installation Guidelines
When inserting the module into an active FIO baseplate slot, slide the enclosure steadily until the backplane connectors lock completely. Fasten retaining screws to ensure continuous chassis grounding and thermal transfer.
Ensure field wiring cables maintain a minimum clearance of 100 mm from high-voltage AC lines to minimize electromagnetic coupling. Verify that cable shield drain wires land at a single grounding bus bar inside the cabinet. Before commissioning output circuits, confirm that external actuator loop resistance remains within the specified 0 to 750 ohm operational limit.