Yokogawa SR-508-00 Safety Relay Module

Overview

The SR-508-00 is a compact safety relay module from Yokogawa Electric Corporation. It ensures reliable shutdown functions in industrial environments. Typical applications include cutting off fuel supply in incinerators or activating emergency stops. The module provides safe isolation between input and output, meeting overvoltage class III standards up to 300V. Its robust design supports continuous operation in harsh industrial conditions.

Technical Specifications

• Model: SR-508-00

• Type: Safety Relay Module

• Input Voltage: 24 V DC (tolerance -15…+20%)

• Input Current: 35–40 mA

• Status Indicator: Red LED for input monitoring

• Isolation: 4 kVrms (1 min), 6 kV surge 1.2/50 µs

• Overvoltage Class: Class III (up to 300V)

• Mounting: DIN rail installation

• Protection Rating: IP20

• Working Temperature: -20 to +70 °C

• Storage Temperature: -25 to +85 °C

• Relative Humidity: Up to 95%, non-condensing

• Output Contact Type: NO, gold-plated over silver alloy

• Minimum Load: 5 V, 10 mA

• Maximum Load:

• 30 V DC, 2 A

• 50 V DC, 1.1 A

• 70 V DC, 0.7 A

• 127 V DC, 0.2 A

• 250 V AC, 2 A (cosϕ > 0.5)

• Mechanical Life: 30 million operations

• Electrical Life: 250,000 operations

• Fuse: Wickmann 193

• On Delay: 3–10 ms

• Off Delay: 5–7 ms

• Bounce Time: 1 ms

• Power Dissipation: 1.5 W

• Weight: 0.11 lbs