Product Description
The SDV531-S33 S2 is a high-integrity 8-channel safety digital output module engineered for the Yokogawa ProSafe-RS Safety Instrumented System (SIS). This S2-revision module provides 24 V DC current-source outputs to drive critical field elements such as solenoid valves and safety relays.
Each output channel is electrically isolated, preventing field-side disturbances from propagating to the system backplane and maintaining SIL3 safety compliance. The module is optimized for low voltage drop and minimal leak current, preventing unintended actuation of sensitive devices.
Designed for high-performance safety loops, it features advanced diagnostics and a rapid 30 ms response time, ensuring precise execution of energize-to-trip or de-energize-to-trip safety logic.
Technical Specifications
| Parameter | Specification |
|---|---|
| Output Channels | 8 channels, current source (sourcing) |
| Rated Output Voltage | 24 V DC |
| Output Voltage Drop | Max. 1 V |
| External Power Requirement | 24 V DC (+20% / -10% tolerance) |
| Max Load Current | 0.6 A per channel (4.8 A total) |
| Min Load Current | 35 mA (required for diagnostic monitoring) |
| Load Resistance Range | 40 Ω – 685 Ω |
| Leak Current (OFF state) | Max. 1.6 mA |
| Response Time | ≤ 30 ms |
| Isolation/Withstand Voltage | 2 kV AC between outputs and system logic |
| Internal Power Consumption | 280 mA @ 5 V DC / 140 mA @ 24 V DC |
| Weight | 0.34 kg |
Application Scenarios
The SDV531-S33 S2 is ideal for localized safety control loops in:
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Refineries
-
Gas processing plants
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Chemical processing facilities
It is particularly suited for controlling a compact set of final elements where 8-channel density is more space- or cost-efficient than larger 16-channel modules.
Minimum Load Current Significance
The 35 mA minimum load is essential for proper pulse-test diagnostics. Loads drawing less than this threshold—such as high-impedance LEDs or small relays—may trigger false "open loop" alarms. In such cases, a dummy resistor can be added to meet the minimum current requirement.
| 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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