Product Description
The Yokogawa SDV531-S23/D4A00 is an 8-channel, high-integrity safety digital output module designed for the ProSafe-RS Safety Instrumented System (SIS). Engineered for SIL 3 safety loops, it provides isolated 24V DC outputs to drive critical actuators, including Emergency Shutdown (ESD) valves and solenoids. The module features advanced internal diagnostics to ensure a fail-safe state in the event of hardware or field faults.
The S23 variant represents the Style S3 hardware revision, offering optimized circuitry for thermal management and long-term reliability. It is ISA Standard G3 corrosive resistant, suitable for standard industrial operating temperatures. The /D4A00 option equips the module with a KS Cable Interface Adapter, allowing secure, high-density connections to safety terminal boards via pre-fabricated cables. This reduces wiring time, simplifies commissioning, and minimizes the risk of manual errors in safety-critical installations.
Technical Specifications
| Feature | Specification |
|---|---|
| Module Type | Safety Digital Output (Current Source type) |
| Number of Channels | 8 channels, fully isolated |
| Hardware Revision | Style S3 (Suffix 2) |
| Rated Load Voltage | 24 V DC |
| Maximum Load Current | 0.6 A per channel (4.8 A total) |
| Minimum Load Current | 35 mA (required for line monitoring) |
| Connectivity | KS Cable Interface Adapter (/D4A00) |
| Environmental Protection | ISA Standard G3 Corrosive Resistance |
| Output Response Time | ≤ 30 ms |
| Safety Integrity | SIL 3 certified (within ProSafe-RS) |
| Withstand Voltage | 2 kV AC between output and system logic |
| Current Consumption | Max 280 mA at 5 V DC, Max 140 mA at 24 V DC |
| Weight | 0.34 kg |
Application Scenarios
The SDV531-S23/D4A00 is widely deployed in Fire & Gas (F&G) systems and Burner Management Systems (BMS) in refineries, chemical plants, and offshore facilities. Its G3 rating ensures reliable operation in corrosive atmospheres containing $H_{2}S$ or other industrial pollutants. The KS Cable Interface supports fast, standardized cabinet wiring, making this module ideal for large-scale projects with tight commissioning timelines.
Technical FAQ
What is the significance of Style S3 (Suffix 2)?
Style S3 is a hardware revision that enhances component longevity and internal diagnostics over older S1 or S2 variants, while remaining fully compatible with existing I/O nests.
Why does the module require a minimum load of 35 mA?
The SDV531 performs pulse-test diagnostics to verify field circuit integrity. Loads below 35 mA may prevent the module from accurately detecting open or short circuit conditions.
| 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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