{"product_id":"sr-508-00-yokogawa-prosafe-safety-relay-module","title":"SR-508-00 YOKOGAWA ProSafe Safety Relay Module","description":"\u003ch2\u003eYOKOGAWA SR-508-00 Safety Relay Module\u003c\/h2\u003e\n\u003cp\u003eConfigured for emergency shutdown and safety interlock execution in process automation control loops, the \u003cstrong\u003eYOKOGAWA SR-508-00\u003c\/strong\u003e (\u003cstrong\u003eSR-508\u003c\/strong\u003e Safety Relay Module) provides direct physical\/electrical execution. The hardware establishes galvano-optical and mechanical isolation between control logic actuation signals and field-side final control elements.\u003c\/p\u003e\n\u003ch3\u003eSuffix Breakdown \u0026amp; Model Matrix\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eBase Model\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSuffix \/ Sub-part\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eConfiguration Description\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSR-508\u003c\/td\u003e\n\u003ctd\u003e-00\u003c\/td\u003e\n\u003ctd\u003eStandard hardware revision, DIN rail mountable safety relay module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSR-508\u003c\/td\u003e\n\u003ctd\u003e510508000\u003c\/td\u003e\n\u003ctd\u003eAssociated manufacturing internal reference \/ catalog sequence number\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eSR-508-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eYokogawa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eChina\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.11 lbs (0.05 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e80 mm x 20 mm x 70.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage\u003c\/td\u003e\n\u003ctd\u003e24 VDC (-15% to +20%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Current\u003c\/td\u003e\n\u003ctd\u003e35 to 40 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003e4 kVrms (1 min), 6 kV surge (1.2\/50 us)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Type\u003c\/td\u003e\n\u003ctd\u003eNormally Open (NO), gold-plated silver alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Output Load\u003c\/td\u003e\n\u003ctd\u003e250 VAC, 2 A \/ 30 VDC, 2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitching Time\u003c\/td\u003e\n\u003ctd\u003eOn-delay: 3 to 10 ms; Off-delay: 5 to 7 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eChannel Isolation \u0026amp; Loop Interfacing\u003c\/h3\u003e\n\u003cp\u003eThe module processes discrete actuation signals through gold-plated silver alloy contacts, isolating high-voltage transients up to Overvoltage Class III (300 V) standards. Optical-to-mechanical isolation boundaries prevent ground potential displacement across the control infrastructure, maintaining system loop integrity during field-side surge occurrences. Built-in fast-acting 2.5 A glass fuses suppress overcurrent events, shielding upstream DCS outputs from field short-circuits.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What is the physical clearance requirement for DIN rail snap-mounting?\u003c\/p\u003e\n\u003cp\u003eA: The chassis occupies a 20 mm width profile on standard TS-35 DIN rails. Allow adequate vertical spacing above and below the module for passive convection cooling across the -20 to +70 deg C operating envelope.\u003c\/p\u003e\n\u003cp\u003eQ: How does the unit process inductive load switching on the relay contacts?\u003c\/p\u003e\n\u003cp\u003eA: Switching AC inductive loads requires external arc suppression circuits across the load contacts when power factor cos phi falls below 0.5 to prevent contact degradation beyond the rated 250,000 electrical operations.\u003c\/p\u003e\n\u003cp\u003eQ: Is the internal overcurrent fuse user-replaceable?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the module uses an integrated 2.5 A fast-acting 5 x 20 mm glass fuse accessible on the housing to protect internal relay traces from load circuit shorts.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eMount the module on a standard 35 mm DIN rail inside an IP54 or better grounded metallic enclosure to protect the unit from environmental contaminants. Snap the base latch onto the rail, confirming a tight mechanical bond to secure physical grounding path continuity.\u003c\/p\u003e\n\u003cp\u003eRoute input power and contact lines separately from heavy motor drive cables and high-voltage AC conductors, maintaining a minimum spacing of 300 mm. Strip field wire leads to specified length and insert them into terminal clamps, torqueing to standard terminal screw tolerances. Ensure the 24 VDC input power source conforms to -15% \/ +20% voltage limits to guarantee coil pull-in without thermal overload.\u003c\/p\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":43873123434586,"sku":"SR-508-00","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/5957\/0778\/files\/851..jpg?v=1787188412","url":"https:\/\/www.spareoil.com\/products\/sr-508-00-yokogawa-prosafe-safety-relay-module","provider":"SpareOil Automation","version":"1.0","type":"link"}