{"product_id":"yokogawa-rs-el56-safety-relay-module","title":"Yokogawa RS-EL56 Safety Relay Module","description":"\u003cp\u003eThe \u003cstrong\u003eYokogawa RS-EL56\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eRS-EL56\u003c\/strong\u003e Safety Relay Module, operates as a dedicated hardware component for fail-safe contact execution and critical trip switching within ProSafe-RS safety instrumented systems. Certified to SIL3 functional safety standards under IEC 61508, the unit processes logic commands from Safety Control Units to actuate up to 16 dry-contact relay output channels, driving interlocks and final control elements operating on a 24 VDC voltage rail.\u003c\/p\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\u003eRS-EL56\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\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eStandard Chassis Weight (Approx. 0.85 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard ProSafe-RS Module Profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-20 to 60 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eRated Voltage: 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Type\u003c\/td\u003e\n\u003ctd\u003eDry-Contact Relay Outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Capacity\u003c\/td\u003e\n\u003ctd\u003e8 or 16 Channels (Up to 256 I\/O System Capacity)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Level\u003c\/td\u003e\n\u003ctd\u003eSIL3 Certified (IEC 61508, ANSI\/ISA 84)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOnboard Processing\u003c\/td\u003e\n\u003ctd\u003e10 MHz Processor, 64 KB RAM, 32 KB EPROM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog \/ Pulse Sampling\u003c\/td\u003e\n\u003ctd\u003e1 Hz - 100 kHz (Accuracy: +\/-0.01% FS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReliability Metric\u003c\/td\u003e\n\u003ctd\u003eMTTF \u0026gt; 100,000 Hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtocol Support\u003c\/td\u003e\n\u003ctd\u003eModbus, ASCII, RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eProSafe-RS Safety Instrumented Systems, CENTUM DCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eField Signal Routing \u0026amp; DCS Loop Integration\u003c\/h3\u003e\n\u003cp\u003eThe RS-EL56 incorporates deterministic output drive logic tailored for critical shutdown loops and safety instrumented functions. Engineered to maintain transparent signal paths and strict channel-to-channel isolation, the module prevents parasitic crosstalk and voltage spikes from propagating back into the safety controller architecture. Galvanic isolation barriers across all active output paths ensure that 4-20 mA HART loop protocol signals and low-voltage digital interlocks connected across shared field marshalling panels operate without electrical interference.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: How does the SIL3 certification on the RS-EL56 affect safety loop design?\u003c\/p\u003e\n\u003cp\u003eA: The SIL3 rating per IEC 61508 verifies that the RS-EL56 meets probability of failure on demand (PFD) targets for high-integrity safety instrumented functions when used in Emergency Shutdown (ESD) configurations.\u003c\/p\u003e\n\u003cp\u003eQ: Can the RS-EL56 exchange field diagnostic data with external SCADA software via serial protocols?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the hardware supports Modbus RTU and ASCII serial communication protocols, allowing external supervisory hosts to poll diagnostic state bits without impacting primary safety logic execution.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Isolation:\u003c\/strong\u003e De-energize the 24 VDC primary power feed and external field load voltages before inserting, wiring, or servicing the module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Socket Mounting:\u003c\/strong\u003e Seat the RS-EL56 squarely into its designated slot in the ProSafe-RS terminal base or rack chassis, pressing firmly until top and bottom locking levers snap into place.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Wiring Terminations:\u003c\/strong\u003e Terminate dry-contact load conductors at the removable terminal block, ensuring current loads do not exceed rated contact capacities to prevent contact degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInductive Suppression:\u003c\/strong\u003e Install external flywheel diodes across DC inductive loads or RC snubbers across AC loads driven by the relay outputs to protect contacts from arc erosion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCabinet Functional Grounding:\u003c\/strong\u003e Verify the enclosure frame and module rack backplane ground lugs connect directly to the cabinet functional earth bus with a low-impedance copper strap.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Yokogawa","offers":[{"title":"Default Title","offer_id":52734398169368,"sku":"RS-EL56","price":200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0892\/3483\/3688\/files\/ANB10D-4213_Cocoai_69a03194-d209-45fc-a7ed-60a35031a93d.jpg?v=1789870946","url":"https:\/\/www.innoplcsync.com\/products\/yokogawa-rs-el56-safety-relay-module","provider":"InnoPLC Sync Co., Ltd.","version":"1.0","type":"link"}