Product Description
The AAI135-H50/K4A00 is a high-precision analog input module for the Yokogawa CENTUM control system, designed to process 4–20 mA DC signals across eight fully isolated channels. Each channel is point-to-point isolated, preventing ground loops, noise coupling, or fault propagation between field circuits and the system backplane.
The module supports HART digital communication, enabling remote configuration, diagnostics, and device management directly from the DCS. When combined with the ATK4A-00 interface adapter, field wiring is simplified through a KS cable connection, significantly improving cabinet organization and installation efficiency.
Technical Specifications
| Parameter | Description |
|---|---|
| Model | AAI135-H50/K4A00 |
| Input Type | 4–20 mA DC |
| Number of Channels | 8 channels, fully isolated |
| Protocol Support | HART |
| Isolation Rating | 500 V AC (channel-to-channel, input-to-system) |
| Accuracy | ±16 µA |
| Input Resistance (Power ON) | 290 Ω @ 20 mA / 450 Ω @ 4 mA |
| Input Resistance (Power OFF) | ≥ 500 kΩ |
| Maximum Input Current | 25 mA |
| Connection Method | KS Cable via ATK4A-00 interface adapter |
| Protection Class | Standard (non-explosion-proof) |
| Weight | 0.3 kg |
Application
The AAI135-H50/K4A00 is well suited for applications requiring high channel isolation and signal reliability, including:
-
Chemical and petrochemical processing
-
Water and wastewater treatment
-
Utilities and infrastructure systems
Its HART capability makes it ideal for plants using smart transmitters and predictive maintenance strategies.
Frequently Asked Questions
Does the AAI135-H50/K4A00 require a specific baseplate?
Yes. It is designed for Yokogawa standard I/O unit baseplates and uses the K4A00 adapter for KS cable connectivity.
What is the advantage of full channel isolation?
Isolation protects against common-mode voltages and ensures that a short circuit, surge, or wiring fault on one transmitter does not affect the remaining seven channels.
| Quick Quotes | Receive price & availability FAST from our dedicated customer service team. |
|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
| Payment | We accept American Express, Discover, MasterCard, PayPal, and Visa. Our site is secured by RapidSSL. |
| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
| A: You can reach out to us via email, WhatsApp, WeChat, Skype, or your preferred communication platform. Contact us with your needs, and we'll provide a prompt, customized quote. |
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