Product Description
The SR-508-00 is a high-integrity safety relay module designed by Yokogawa Electric Corporation for use in Safety Instrumented Systems (SIS) such as the Yokogawa ProSafe-RS platform.
This module functions as a critical safety interface between low-power logic controllers and field-side safety actuators. It is commonly used for:
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Emergency shutdown (ESD) circuits
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Safety interlock protection loops
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Equipment fail-safe control logic
The SR-508-00 is engineered for deterministic safety operation and high electrical isolation performance. Its 4 kVrms galvanic isolation prevents hazardous voltage propagation between field devices and control electronics.
The hardware is built for harsh industrial environments, featuring surge protection and wide temperature tolerance, making it suitable for continuous operation in oil and gas, chemical processing, and power generation facilities.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model Identifier | SR-508-00 |
| Device Type | Safety relay / signal isolation module |
| Nominal Input Voltage | 24 V DC |
| Input Voltage Range | 20.4 – 28.8 V DC (-15% to +20%) |
| Operating Current | 35 – 40 mA |
| Dielectric Strength | 4 kVrms (1 minute test) |
| Surge Protection | 6 kV (1.2/50 μs waveform) |
| Overvoltage Category | Class II (up to 300 V compliance) |
| Operating Temperature | -20 °C to +70 °C |
| Mounting Type | 35 mm DIN rail mounting |
Safety Application and Logic
The SR-508-00 is commonly deployed to:
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Drive final control elements such as shutdown valves
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Provide dry-contact feedback signals to safety controllers
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Maintain electrical separation between controller outputs and field actuators
Its isolation architecture helps prevent back-EMF damage and ground-loop noise from affecting safety loop performance.
Technical FAQ
Can the SR-508-00 be installed in outdoor enclosures?
Yes. However, due to its IP20 rating, it must be installed inside a secondary protective enclosure that provides dust and moisture protection, such as NEMA or higher IP-rated cabinets.
What is the significance of the 6 kV surge rating?
The surge rating ensures the module can withstand transient voltage spikes caused by lightning events or heavy industrial switching without propagating faults into the control logic circuitry.
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|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
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| 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. |
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