{"product_id":"honeywell-05701-a-0329-system-57-triple-dpco-relay-card","title":"Carte relais triple DPCO Honeywell 05701-A-0329 System 57","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e05701-A-0329\u003c\/strong\u003e functions as a high-integrity field interface and switching termination card inside the \u003cstrong\u003eSystem 57\u003c\/strong\u003e architecture. This device provides a dedicated electrical framework to link field-mounted gas detection sensors and active processing nodes with external alarm signaling, field indicators, or automatic process shutdown equipment.\u003c\/p\u003e\n\u003cp\u003eThe module incorporates three independent double-pole change-over (\u003cstrong\u003eDPCO\u003c\/strong\u003e) electromechanical relays, configured to deliver voltage-free contact outputs based on localized danger thresholds. These onboard relay circuits are mapped directly across the common sub-rack backplane to mirror dedicated event parameters handled by the companion single-channel control cards, responding to \u003cstrong\u003eA1 alarm\u003c\/strong\u003e, \u003cstrong\u003eA2 alarm\u003c\/strong\u003e, and \u003cstrong\u003efault condition\u003c\/strong\u003e routines. Its physical design utilizes compression-style terminal execution to preserve low-resistance wiring continuity, facilitating signal integrity isolation and localized instrumentation shield grounding required within heavy manufacturing or processing installations.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFeatures three high-density double-pole change-over (\u003cstrong\u003eDPCO\u003c\/strong\u003e) electromechanical relays delivering dual-pole voltage-free contact operation.\u003c\/li\u003e\n\u003cli\u003eMaps distinct hardware switching loops for three functional control parameters: \u003cstrong\u003eA1 alarm level\u003c\/strong\u003e, \u003cstrong\u003eA2 alarm level\u003c\/strong\u003e, and system \u003cstrong\u003efault condition\u003c\/strong\u003e validation.\u003c\/li\u003e\n\u003cli\u003eProvides dedicated internal ground distribution tracks allowing structured instrumentation cable shield drain paths directly at the module level.\u003c\/li\u003e\n\u003cli\u003eStructured in a standard 3U format compatible with System 57 backplane communications and standard rack power line footprints.\u003c\/li\u003e\n\u003cli\u003eIncorporates rugged heavy-duty screw terminal blocks to maintain rigid wire retention under industrial vibration scenarios.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-pole interlocking shutdown control loops requiring simultaneous isolation of redundant power and control paths during gas hazards.\u003c\/li\u003e\n\u003cli\u003eInterfacing gas detection sub-racks with centralized safety instrumented systems (SIS) or critical plant distributed control systems (DCS).\u003c\/li\u003e\n\u003cli\u003eRemote signaling management for high-capacity visual strobe arrays and audible sirens across petrochemical refineries or water treatment plants.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical 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\u003eSpecifications\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e05701-A-0329\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTriple DPCO Relay Card\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSystem 57 \/ 5701 Series Control System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContact Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDouble Pole Change-Over (DPCO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRelay Allocations\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eA1 Alarm, A2 Alarm, Fault Condition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Switching Limit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5A maximum (under resistive AC mains switching loads)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 Kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eConnections\/Interfaces\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eConnector Terminal\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFault NC1 \/ NO1 \/ COM1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFault Relay Pole 1 Normally Closed \/ Normally Open \/ Common Contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFault NC2 \/ NO2 \/ COM2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFault Relay Pole 2 Normally Closed \/ Normally Open \/ Common Contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA1 NC1 \/ NO1 \/ COM1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlarm 1 Relay Pole 1 Normally Closed \/ Normally Open \/ Common Contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA1 NC2 \/ NO2 \/ COM2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlarm 1 Relay Pole 2 Normally Closed \/ Normally Open \/ Common Contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA2 NC1 \/ NO1 \/ COM1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlarm 2 Relay Pole 1 Normally Closed \/ Normally Open \/ Common Contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eA2 NC2 \/ NO2 \/ COM2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAlarm 2 Relay Pole 2 Normally Closed \/ Normally Open \/ Common Contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor S\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSensor Supply Line Path\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor NS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSensor Non-Sink \/ Signal Input Path\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor 0V\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSensor 0V Reference Line Path\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInstrumentation Clean Earth Cable Shield Ground Terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eInstallation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFusing Regulations\u003c\/strong\u003e: Limit external circuit feeds routed through the relay contacts with an active inline 5A maximum safety fuse to shield internal module traces from overcurrent states.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Impedance Earthing\u003c\/strong\u003e: Ensure a clean instrumentation grounding wire is bonded securely to the card ground terminals to facilitate proper drainage of ambient RFI\/EMI.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiring Type and Terminations\u003c\/strong\u003e: Connect all field sensors and output interlocks using multi-conductor shielded instrumentation cable up to 2.5mm2, crimping raw ends with insulated ferrules before insertion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparation of Voltage Classes\u003c\/strong\u003e: Route low-voltage DC analog sensor lines through separate trunking conduits away from any high-voltage AC mains lines wired across the DPCO contacts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShield Continuity Management\u003c\/strong\u003e: Isolate the cable shielding path at the field device end if the transmitter housing is bolted directly to local earth-grounded infrastructure to block common-mode loop currents.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the structural benefit of a DPCO relay layout over an SPCO card?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe double-pole configuration provides two isolated pairs of tracking contacts per relay, allowing a single alarm trigger to isolate two independent external loops, such as switching a 230V AC siren while signaling a 24V DC digital input on a remote PLC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow are the default contact states for the NC and NO references determined?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAll contact descriptions mapped onto the terminal blocks match the physical state of the card when it is completely powered down or disconnected from the backplane assembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the fault relay operate in a normally energized or de-energized manner?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe onboard fault relay functions in a permanently energized configuration under normal safe operations, ensuring that any severe system power drop or module removal instantly opens the contact to produce a fail-safe alert.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan the alarm relay drive behaviors be modified for normally energized logic?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the actuation profiles for both the A1 and A2 alarm relays can be configured as normally energized or normally de-energized by running adjustments through the System 57 Engineering Interface.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default 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