{"product_id":"honeywell-fs-bkm-0001-battery-and-key-switch-module","title":"Honeywell FS-BKM-0001 Battery and Key Switch Module","description":"\u003cp\u003eThe \u003cstrong\u003eHoneywell FS-BKM-0001\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eFS-BKM-0001\u003c\/strong\u003e Battery and Key Switch Module, operates as a dedicated hardware component for system mode override, key-locked security execution, and backup battery power routing within Honeywell Safety Manager 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\u003eFS-BKM-0001\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\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 0.50 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard Safety Manager chassis slot dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e-40 deg C to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eMax. 20 mA @ 24 VDC (7 mA typ.), Max. 10 mA @ 5 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKey Switch Type\u003c\/td\u003e\n\u003ctd\u003eSPST (Single Pole Single Throw)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Voltage\u003c\/td\u003e\n\u003ctd\u003e12 VDC nominal (14-31 VDC output supply range)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage Inputs\u003c\/td\u003e\n\u003ctd\u003e24 VDC (+15% to +30%) and 5 VDC (+\/-10%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Resistance\u003c\/td\u003e\n\u003ctd\u003eApprox. 2 x 1.1 kohm (parallel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Rating\u003c\/td\u003e\n\u003ctd\u003eIP67 environmental protection rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003e4-20 mA HART Loop Protocol and Channel-to-Channel Isolation\u003c\/h3\u003e\n\u003cp\u003eThe module incorporates galvanically decoupled key switch contacts and isolated battery backup lines to maintain strict channel-to-channel isolation across internal system buses. High-impedance switching circuits (approx. 2 x 1.1 kohm output resistance in parallel) prevent high-voltage noise coupling into adjacent logic solver backplane lines. This isolation architecture prevents transient voltage surges on the 24 VDC auxiliary power rail from interfering with process control signals or 4-20 mA HART loop protocol instruments connected to adjacent safety I\/O modules.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What key switch mechanism and electrical contact configuration are integrated into the FS-BKM-0001?\u003c\/p\u003e\n\u003cp\u003eA: The module uses an SPST (Single Pole Single Throw) mechanical key switch rated for low-current control signal switching and hardware access control.\u003c\/p\u003e\n\u003cp\u003eQ: What are the primary DC input power requirements for module operation?\u003c\/p\u003e\n\u003cp\u003eA: The module requires dual supply inputs consisting of a 24 VDC line (18.4 VDC to 31.2 VDC range, 20 mA maximum current draw) and a 5 VDC bus line (+\/-10%, 10 mA maximum current draw).\u003c\/p\u003e\n\u003cp\u003eQ: Can the backup battery circuit be serviced while the primary 24 VDC power supply remains energized?\u003c\/p\u003e\n\u003cp\u003eA: Yes, battery removal can be executed without disrupting 5 VDC logic backplane power, provided proper grounding and anti-static ESD procedures are observed during handling.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIsolate auxiliary power lines connected to the module rack location prior to inserting or removing the unit.\u003c\/li\u003e\n\u003cli\u003eAlign the module card-edge connectors with the designated chassis rails and slide in smoothly until backplane headers seat completely.\u003c\/li\u003e\n\u003cli\u003eTighten front panel retaining screws to secure mechanical grounding against the rack frame and ensure IP67 front face sealing.\u003c\/li\u003e\n\u003cli\u003eConnect backup battery wiring directly to designated isolated terminals, ensuring correct polarity alignment before restoring primary 24 VDC system power.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":52833856356648,"sku":"FS-BKM-0001","price":315.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/6266\/2184\/files\/FS-BKM-0001.png?v=1790153125","url":"https:\/\/www.powerdcs.com\/products\/honeywell-fs-bkm-0001-battery-and-key-switch-module","provider":"Power DCS Parts Limited","version":"1.0","type":"link"}