Product Description
The Yokogawa SAI143-H03/A4D00 is a high-integrity analog input module designed specifically for Safety Control Units (SCU) and Safety Node Units (SNU). It provides 16 fully isolated current input channels, making it a core component in Safety Instrumented Systems (SIS) where deterministic response, accuracy, and electrical protection are critical.
The module supports 2-wire and 4-wire transmitter configurations, selectable per channel via hardware setting pins, allowing flexible connection of loop-powered and externally powered field devices. With a fast 40 ms internal data refresh rate and high dielectric withstand capability, the SAI143-H03/A4D00 ensures reliable signal acquisition while protecting the safety system backplane from field-side electrical disturbances.
Technical Specifications
| Item | Specification |
|---|---|
| Ordering Code | SAI143-H03/A4D00 |
| Application Type | Safety analog input (SIS) |
| Channel Count | 16 isolated channels |
| Rated Input Signal | 4–20 mA DC |
| Permissible Input Range | 0–25 mA |
| Accuracy (H-version) | ±16 μA (0.05–23 mA) |
| Input Impedance | 250 Ω (power ON) |
| Update Rate | 40 ms |
| Transmitter Supply (2-wire) | ≥16.15 V at 20 mA |
| Isolation Strength | 1.5 kV AC, 60 s (Input to System) |
| Temperature Drift | ±16 μA per 10°C |
| Power Consumption | 320 mA @ 5 V / 550 mA @ 24 V |
| Weight | 0.34 kg |
Application Scenarios
The SAI143-H03/A4D00 is intended for safety-critical analog input loops in Yokogawa ProSafe-RS and safety-integrated CENTUM architectures. Typical applications include:
-
Emergency Shutdown (ESD) systems
-
Fire & Gas detection monitoring
-
High-pressure and over-temperature protection loops
-
Offshore platforms, chemical reactors, and LNG facilities
Its precision and fast update cycle make it suitable for SIL-rated protection functions.
FAQ
Q: How do I select between 2-wire and 4-wire transmitter modes?
Each channel is configured using physical setting pins on the module, allowing independent selection of loop-powered (2-wire) or externally powered (4-wire) operation.
Q: What is the difference between the “S” and “H” versions of the SAI143?
The H-version (High-precision) supports a wider effective measurement range (0.05–23 mA) while maintaining accuracy, compared to the standard S-version, which is optimized for the nominal 4–20 mA range.
| 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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