{"product_id":"honeywell-05704-a-0121-quad-relay-interface-card","title":"Honeywell 05704-A-0121 Quad Relay Interface Card","description":"\u003cp\u003eConfigured for discrete output switching in gas detection and control architectures, the \u003cstrong\u003eHoneywell 05704-A-0121\u003c\/strong\u003e (\u003cstrong\u003e05704-A-0121\u003c\/strong\u003e Quad Relay Interface Card) provides direct physical execution of sensor-to-controller signal routing. The module serves as a primary relay interface utilized to execute alarm and control switching across Honeywell DCS platforms.\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\u003e05704-A-0121\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.23 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e132 x 25 x 119 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eNot Specified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e1.0 W (Typical) \/ 1.7 W (Maximum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelay Configuration\u003c\/td\u003e\n\u003ctd\u003e4 x SPCO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Rating\u003c\/td\u003e\n\u003ctd\u003e5 A at 110\/250 VAC; 5 A at 32 VDC (Non-inductive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eDCS Process Control and Connectivity\u003c\/h3\u003e\n\u003cp\u003eThe 05704-A-0121 facilitates interconnection between four independent sensors and the control system logic. The module provides channel-to-channel isolation on the relay output side, ensuring that switching transients from one relay do not interfere with adjacent signal paths or the central processing unit. The card supports configurable relay behavior, including latching\/non-latching modes and energized\/de-energized state logic, allowing for flexible integration into diverse safety and process interlock schemes. HART loop protocol compatibility is maintained for upstream sensors by ensuring the interface card imposes minimal impedance on the primary measurement loop.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Can this module be hot-swapped while the field loop is energized?\u003c\/p\u003e\n\u003cp\u003eA: Hot-swapping the 05704-A-0121 is not supported. Removing or installing the card while the backplane is powered may cause an accidental relay state transition or trigger a bus fault, leading to unintended activation of external alarm devices.\u003c\/p\u003e\n\u003cp\u003eQ: Are the relay contacts rated for inductive loads?\u003c\/p\u003e\n\u003cp\u003eA: The contact ratings (5 A at 250 VAC \/ 32 VDC) are specified for non-inductive loads. If the relay is utilized to drive inductive loads such as solenoid valves or contactor coils, an external suppression device (e.g., flyback diode or snubber circuit) must be installed to prevent arcing and premature relay failure.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eEnsure the control rack power is de-energized and locked out before card installation.\u003c\/li\u003e\n\u003cli\u003eVerify that the field wiring conductor size is compatible with the 2.5 mm (14 AWG) terminal limit.\u003c\/li\u003e\n\u003cli\u003eSeat the module into the designated rack slot, ensuring the backplane connector is correctly aligned and fully inserted.\u003c\/li\u003e\n\u003cli\u003eSecure the card faceplate to the rack frame to ensure a low-impedance ground connection, which aids in EMI protection for the relay drive circuitry.\u003c\/li\u003e\n\u003cli\u003eConfigure the relay operational mode (latching\/non-latching, energized\/de-energized) via the system software or onboard jumpers before commissioning the loop.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":52976004825397,"sku":"05704-A-0121","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0973\/7630\/5461\/files\/05704-A-0121.png?v=1780990571","url":"https:\/\/www.5gplc.com\/products\/honeywell-05704-a-0121-quad-relay-interface-card","provider":"High Five PLC Solution Limited","version":"1.0","type":"link"}