Product Description
The AAI841 (P/N: AAI841-H50/A4S00) is a high-density analog I/O module for the Yokogawa CENTUM VP distributed control system. It maximizes rack utilization by delivering 8 analog input channels and 8 analog output channels within a single I/O slot.
This model is a non-isolated (common-ground) design, making it well suited for systems where field devices are externally isolated or share a stable reference potential. The A4S00 option equips the module with a pressure clamp terminal block, enabling secure, vibration-resistant direct field wiring without the need for KS cable adapters.
With integrated HART communication (H-suffix), the AAI841-H50/A4S00 supports smart device configuration, diagnostics, and digital asset management alongside standard analog control.
Technical Specifications
| Item | Specification |
|---|---|
| I/O Configuration | 8 × analog input + 8 × analog output |
| Total Channels | 16 channels |
| Signal Range | 4 to 20 mA DC (input and output) |
| Communication Protocol | HART (digital signal superimposed on 4–20 mA) |
| Wiring Interface | Pressure clamp terminal block (A4S00 option) |
| Isolation | Non-isolated (common ground) |
| Withstand Voltage | 500 V AC (I/O to system logic) |
| Input Resistance | 250 Ω to 500 Ω (signal dependent) |
| Input Accuracy | ±16 µA |
| Output Accuracy | ±48 µA |
| Safety Type | Basic type, non-explosion protected (H50) |
| Module Weight | 0.3 kg |
Application Use Cases
The AAI841-H50/A4S00 is commonly deployed in large-scale industrial plants such as refineries, water treatment facilities, and utility systems, where high I/O density, space efficiency, and HART-enabled device management are required.
It is particularly effective for grouped control loops—such as flow or temperature control valves—where centralized wiring and smart diagnostics simplify maintenance.
FAQ
What is the advantage of the A4S00 option compared to K4A00?
The A4S00 option provides pressure clamp terminals for direct wiring, ideal for custom field cabling. The K4A00 option uses a KS cable interface for fast, standardized plug-and-play installation.
Does the non-isolated design affect signal quality?
In systems with significant ground potential differences, isolated modules are recommended. However, in well-grounded systems or with pre-isolated transmitters, the AAI841 offers a cost-effective and space-efficient solution without compromising performance.
| 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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