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- Yokogawa
- AAI835-H50/K4A00
- Analog I/O Module
- Japan
- 100 mm (W) × 130 mm (H) × 28 mm (D)
- 0.22kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
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We provide 7*24 hours service to our customers. We will be there whenever you need us.
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All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview: AAI835‑H50/K4A00
Product Parameters
| Parameter | Specification |
|---|---|
| Power Supply | 24 V DC, typical current draw: 350 mA; maximum: 400 mA |
| Input Signal | 4 x isolated 4–20 mA analog input channels |
| Output Signal | 4 x isolated 4–20 mA analog output channels |
| Isolation Voltage | 500 V AC isolation between inputs, outputs, and system ground |
| Input Resistance (ON) | Approx. 250 Ω at 20 mA |
| Output Load Capacity | Up to 600 Ω at full output (20 mA) |
| Accuracy | Inputs: ±20 µA; Outputs: ±60 µA |
| Data Refresh Rate | Approximately 12 ms |
| Temperature Drift | ±20 µA per 10 °C change |
| Connection Method | K4 interface for modular rack or cable system |
| Dimensions | 100 mm (W) × 130 mm (H) × 28 mm (D) |
| Weight (kg) | 0.22 kg |
Product Introduction
The AAI835‑H50/K4A00 is a precision four‑channel analog I/O module tailored for distributed control and fieldbus systems. Built for robust signal handling, this module offers 4–20 mA isolated input and output in each channel, combined with reliable 500 V electrical isolation. Compact and lightweight, it connects through the K4 modular interface for seamless integration into control racks or wiring looms. Ideal where accuracy, safety, and modularity matter.
Product Applications
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Distributed control systems with modular rack backplanes
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Loop-powered transmitter signal interfacing in process plants
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Analog I/O expansion for automation panels or control clusters
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Retrofits where compact isolation is essential
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Integration into communication-based infrastructure using standard channel modules
Product Advantages
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Isolated safety – 500 V AC isolation safeguards against ground loops and interference.
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Compact & light – Weighing just 0.22 kg and slim rack-compatible profile.
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Fast read‑write – 12 ms data turnaround ensures responsive signal exchange.
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Accurate & reliable – µA-level errors and limited temperature drift maintain signal fidelity.
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Modular integration – K4 interface simplifies installation, servicing, and system expandability.
Brand & Series
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Brand: A trusted developer of rugged, industrial-grade I/O and display instrumentation.
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Series: Part of the AAI835 modular analog I/O family, with the “H50” indicating four-channel analog I/O and “K4A00” denoting the K4 interface type.
Related and Popular Models
A. Same Series / Related Variants (AAI835 Four-Channel I/O)
| Model | Signal Type | Interface / Feature | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| AAI835‑H50/13S00 | 4–20 mA I/O | Pressure-clamp terminal connection | 100 × 130 × 30 | 0.30 |
| AAI835‑S50/K4A00 | 4–20 mA I/O | K4 interface without HART functionality | 100 × 130 × 28 | 0.20 |
| AAI835‑H53/K4A00 | 8–16 channels | Rack-mounted, multiple analog I/O | 150 × 130 × 28 | 0.50 |
| AAI835‑H50 | 4–20 mA I/O | Standard version with basic interface | 100 × 130 × 28 | 0.22 |
| AAI835‑S50/S3 | Universal I/O | Voltage or current with bar graphs | 100 × 130 × 30 | 0.35 |
B. Other Popular Models from Same Brand (General I/O and Display Modules)
| Model | Key Feature | Application Range | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| AAI841‑S50 | 8-ch analog input/output | Versatile signaling and control | 120 × 130 × 35 | 0.40 |
| AAI135‑H50/13S00 | 16-ch I/O module | Higher channel density for control | 200 × 130 × 45 | 0.45 |
| AAI143‑S50 | Input-only 16 channels | Bulk analog signal gathering | 200 × 130 × 45 | 0.50 |
| AAA990‑C05 | Display panel with alarms | Visual control and warnings | 96 × 48 × 105 | 0.60 |
| ABX770‑C30 | Touchscreen interface | Process visualization and control | 144 × 144 × 70 | 1.00 |
Frequently Asked Questions (QA Format)
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Q: What kind of signals does AAI835‑H50/K4A00 handle?
A: It processes four isolated 4–20 mA analog inputs and outputs. -
Q: Does it offer electrical isolation?
A: Yes, each channel is isolated with up to 500 V AC between I/O and system. -
Q: How fast does it update data?
A: Data is refreshed every approximately 12 ms. -
Q: What level of accuracy does this module maintain?
A: Input accuracy is ±20 µA and output accuracy is ±60 µA. -
Q: What is the typical temperature drift?
A: Drift is about ±20 µA per 10 °C change. -
Q: How does it connect to the system?
A: It uses a K4 modular backplane interface for clean, quick installation. -
Q: What are its dimensions?
A: The module measures 100 mm wide, 130 mm high, and 28 mm deep. -
Q: How heavy is it?
A: It weighs roughly 0.22 kg. -
Q: Is it compact enough for dense racks?
A: Definitely. Its slim form and light weight make it ideal for tight installations. -
Q: What does “H50/K4A00” denote?
A: “H50” indicates the four-channel analog I/O type; “K4A00” refers to the K4 interface standard.