Product Description
The SDV521-S33 S2 is a high-capacity safety digital output module designed for the Yokogawa ProSafe-RS Safety Instrumented System (SIS). Unlike standard high-density modules, it provides 4 isolated current-source output channels, each capable of delivering up to 2 A, making it ideal for heavy-duty field devices such as large solenoid valves and high-power signaling equipment that exceed standard 0.6 A module capacity.
Manufactured in Japan, the SDV521-S33 S2 meets SIL3 safety certification standards, featuring continuous hardware integrity checks. The S2 revision indicates an optimized hardware build with enhanced thermal stability for sustained high-current operation. The module can be configured in redundant pairs for maximum process availability.
Technical Specifications
| Parameter | Specification |
|---|---|
| Output Channels | 4 channels, module-to-channel isolation |
| Output Type | Current source (sourcing) |
| Rated Output Voltage | 24 V DC |
| Max Voltage Drop | 1 V DC at full load |
| Max Load Current | 2.0 A per channel (8 A total module) |
| Min Load Current | 100 mA (required for diagnostic pulse testing) |
| Load Resistance Range | 12 Ω – 240 Ω |
| External Power Supply | 24 V DC (10 A minimum recommended) |
| Safety Level | SIL3 certified (ProSafe-RS ESD systems) |
| Response Time | ≤ 40 ms |
| Net Weight | 0.3 kg |
Industrial Application
The SDV521-S33 S2 is used in heavy industrial sectors where high-current actuation is required:
-
Power generation facilities
-
Petrochemical and chemical refineries
It is ideal for driving high-wattage actuators and executing energize-to-trip safety functions where standard 0.6 A modules are insufficient, ensuring reliable operation in Emergency Shutdown (ESD) scenarios.
Frequently Asked Questions
Why is the minimum load current 100 mA?
The SDV521-S33 S2 is a high-power driver. A minimum load of 100 mA is required for its internal pulse-test diagnostics to accurately monitor line faults. Loads below this threshold may trigger false open-loop alarms.
Can this module be used in a redundant configuration?
Yes. In a dual-redundant setup, two SDV521-S33 S2 modules operate in parallel to ensure that, if one module fails, the connected final control elements continue to operate safely without interruption.
| 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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