{"product_id":"honeywell-05701-a-0325-system-57-dc-input-card","title":"Honeywell 05701-A-0325 System 57 DC Input Card","description":"\u003ch3\u003eDescription\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e05701-A-0325\u003c\/strong\u003e functions as a dedicated power distribution interface module developed for the \u003cstrong\u003eSystem 57\u003c\/strong\u003e sub-rack architecture. This device provides the primary electrical entry point for external nominal \u003cstrong\u003e24V dc\u003c\/strong\u003e power entering the control system rack, routing the supply directly through the Engineering Card and the sub-rack backplane to deliver stable power to all fitted monitoring or control cards.\u003c\/p\u003e\n\u003cp\u003eThe card incorporates an onboard fuse protection mechanism alongside low-pass \u003cstrong\u003eRFI filtering\u003c\/strong\u003e and high-integrity \u003cstrong\u003ereverse polarity protection\u003c\/strong\u003e circuits to shield the internal backplane logic from upstream power electrical anomalies. It features dual-diode isolation paths that facilitate the concurrent connection of a primary power supply unit (PSU) and an auxiliary standby backup battery system, guaranteeing uninterrupted safety operation during primary utility outages. The interface utilizes a detachable two-part terminal block (\u003cstrong\u003eTB1\u003c\/strong\u003e) to allow prompt mechanical hot-swapping or card replacement without necessitating discrete field wire disconnections.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBuilt with a pluggable, \u003cstrong\u003etwo-part terminal block (TB1)\u003c\/strong\u003e to facilitate quick hardware removal and maintenance actions without disturbing active field wiring connections.\u003c\/li\u003e\n\u003cli\u003eIncorporates dual-path \u003cstrong\u003ediode isolation\u003c\/strong\u003e separating the main power supply unit (PSU) input and the auxiliary standby battery (AUX) input terminal lines.\u003c\/li\u003e\n\u003cli\u003eEquipped with integrated high-efficiency \u003cstrong\u003eRFI filtering\u003c\/strong\u003e components to attenuate high-frequency radio frequency interference along incoming power cables.\u003c\/li\u003e\n\u003cli\u003eIntegrates a dedicated, hardware-level \u003cstrong\u003ereverse polarity protection\u003c\/strong\u003e circuit to safeguard backplane-connected electronics from incorrect installation wiring.\u003c\/li\u003e\n\u003cli\u003eFeatures integrated overcurrent \u003cstrong\u003efuse protection\u003c\/strong\u003e directly situated on the main DC distribution trace to intercept power surges before backplane transmission.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMain sub-rack DC power filtering and safety distribution for Honeywell System 57 combustible and toxic gas detection racks.\u003c\/li\u003e\n\u003cli\u003eDual-source redundant power termination interface configurations utilizing standby industrial battery banks in high-integrity control rooms.\u003c\/li\u003e\n\u003cli\u003eLarge-scale industrial gas marshaling systems requiring segmented power infrastructure to prevent backplane overcurrent propagation.\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-0325\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC Input 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\u003eNominal Input Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24V dc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface Connector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTwo-part terminal block TB1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProtection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFuse, Reverse Polarity, and RFI Filtering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIsolation Mechanism\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDiode isolated PSU and AUX paths\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 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 Pin\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\u003eTB1 - PSU (+)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePrimary External 24V DC Power Supply Positive Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTB1 - PSU (-)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePrimary External 24V DC Power Supply Negative Common\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTB1 - AUX (+)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandby Backup Battery Supply Positive Input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTB1 - AUX (-)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandby Backup Battery Supply Negative Common\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTB1 - GND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInstrumentation Clean Earth Shield Connection\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\u003eSub-Rack Power Balancing\u003c\/strong\u003e: In system installations embedding more than eight 5704 Catalytic Control Cards, power the control cards through their associated Quad Relay Interface Cards instead, utilizing this input card exclusively to feed the main Engineering Card.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal Wiring Safety\u003c\/strong\u003e: Ensure all stranded power supply conductors are terminated into the removable block TB1 using appropriate crimped wire ferrules to eliminate loose thread tracking or arc faults.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedundant Path Wiring\u003c\/strong\u003e: Connect independent, isolated power paths when deploying both PSU and AUX configurations, ensuring that backup batteries conform to nominal 24V dc operating metrics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolarity Verification\u003c\/strong\u003e: double-check input lead configurations prior to energizing primary lines; although reverse polarity protection is built into the card, sustained incorrect polarity can cause localized fuse failure.\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 exact purpose of the two-part terminal block on this card?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe two-part terminal block TB1 allows the upper wiring assembly to be disconnected from the card as a single physical piece, allowing technicians to slide out the card for maintenance or replacement without labeling and unscrewing individual power conductors.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eCan this input card handle the power distribution for an entirely filled rack of catalytic cards?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIf a sub-rack contains more than eight 5704 Catalytic Cards, distributing full sensor drive power over the shared backplane can lead to high current loads. In this scenario, it is standard practice to power the control cards locally via Quad Relay Interfaces and use this card to run the Engineering Card.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHow does the module manage a simultaneous drop in primary power when a battery is connected?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe onboard PSU and AUX distribution paths are structurally isolated from each other using power blocking diodes. If the primary power supply source drops below the potential of the backup battery, the diode path shifts conduction seamlessly without causing line drops or voltage dips on the backplane logic.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this module provide isolated outputs for different control cards?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo, this card acts as a centralized parallel bus distribution point, filtering and routing the unified 24V DC rail across the common backplane infrastructure to all slot locations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":52705330430315,"sku":"05701-A-0325","price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0953\/3227\/0443\/files\/05701-a-0325-cjwkuzgzc5b_35fe75d9-cc1a-46fc-9e61-fbd22d6a3522.jpg?v=1766640608","url":"https:\/\/www.plcprotech.com\/products\/honeywell-05701-a-0325-system-57-dc-input-card","provider":"PLC ProTech Ltd.","version":"1.0","type":"link"}