Product Description
The Yokogawa SDV531-L33 is a high-density digital output module engineered for the ProSafe-RS Safety Instrumented System (SIS). It provides eight fully isolated 24 V DC digital output channels, forming the critical interface between safety logic execution and field final elements such as solenoid valves, interposing relays, and status indicators.
Optimized for SIL 3 safety applications, the SDV531-L33 delivers higher channel density without compromising functional safety or system availability. Advanced self-diagnostics continuously supervise output integrity and field wiring health, ensuring reliable actuation during safety demands. Full compatibility with Yokogawa’s FIO (Field Network I/O) architecture allows compact, modular installation suited for space-constrained safety cabinets in heavy-duty industrial environments.
Technical Specifications
| Parameter | Description |
|---|---|
| Model Number | SDV531 |
| Suffix Code | -L33 |
| Output Channels | 8-channel digital output |
| Isolation | Channel-to-channel and field-to-system |
| Output Signal | 24 V DC, Source type |
| Rated Load Current | Up to 0.6 A per channel |
| Safety Integrity Level | SIL 3 certified |
| Diagnostics | Output read-back, short-circuit detection, open-loop detection |
| Isolation Voltage | 1500 V AC (field to system logic) |
| Internal Power Consumption | Approx. 500 mA @ 5 V DC |
| Dimensions (W × H × D) | 32 × 133 × 152 mm |
| Weight | 0.3 kg |
Application Areas
-
Critical Process Protection
Execution of emergency shutdown sequences in oil & gas, refining, and petrochemical facilities. -
Automated Fire Suppression Systems
Actuation of deluge valves and localized fire-extinguishing equipment in hazardous areas. -
Safety Interlocking
High-integrity interlock control for rotating machinery, compressors, and high-pressure reactors.
Technical FAQ
Q: What is the main difference between the SDV531 and SDV521?
A: The SDV531-L33 provides 8 output channels, while the SDV521 series typically offers 4 channels, enabling higher I/O density within the same safety rack footprint.
Q: Does the SDV531-L33 support line monitoring?
A: Yes. Integrated diagnostics detect both short circuits and open circuits, supporting SIL 3 compliance and early fault detection.
Q: Can the SDV531-L33 be replaced while the system is operating?
A: When installed in a redundant ProSafe-RS configuration, the module supports hot swapping, allowing maintenance without compromising the active safety function.
| 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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