{"product_id":"ics-triplex-t8846-speed-input-field-terminal-assembly","title":"ICS Triplex T8846 Speed Input Field Terminal Assembly","description":"\u003cp\u003eConfigured for field termination and signal conditioning of speed sensors in the Trusted TMR Safety System, the \u003cstrong\u003eICS Triplex T8846\u003c\/strong\u003e (\u003cstrong\u003eT8846\u003c\/strong\u003e Speed Input Field Terminal Assembly) provides the physical interface between field speed inputs and the T8442 Speed Monitor Module. The assembly supports nine speed input channels in three groups of three, with fused dual 24 VDC field power feeds and electrical isolation between input groups and the system backplane.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003eT8846\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003ePP49283-8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eICS Triplex \/ Rockwell Automation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eSpeed Input Field Terminal Assembly (SIFTA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eTrusted TMR Safety System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Module\u003c\/td\u003e\n\u003ctd\u003eT8442 Speed Monitor Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Capacity\u003c\/td\u003e\n\u003ctd\u003e9 speed input channels, arranged in 3 groups of 3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Sensors\u003c\/td\u003e\n\u003ctd\u003eActive speed sensors, including totem-pole and open-collector types; passive magnetic\/inductive speed pickups\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eField Power Supply\u003c\/td\u003e\n\u003ctd\u003eDual 24 VDC feeds, diode-commoned\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Fuse Rating\u003c\/td\u003e\n\u003ctd\u003e50 mA per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagnostics\u003c\/td\u003e\n\u003ctd\u003eOn-board LED indicators for field power integrity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIsolation\u003c\/td\u003e\n\u003ctd\u003eElectrical isolation between input groups and system backplane\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eStandard DIN rail\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e31.8 mm x 168 mm x 147 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Rating\u003c\/td\u003e\n\u003ctd\u003eSIL 3 compliant within the Trusted system context\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eTMR Speed Input and Field Isolation\u003c\/h3\u003e\n\u003cp\u003eThe T8846 divides the nine speed inputs into three independent groups. The group isolation limits electrical fault propagation between sensor sets and the system backplane. Dual 24 VDC field supplies are diode-commoned, while individual channel fuses provide protection against field short circuits and overcurrent conditions.\u003c\/p\u003e\n\u003cp\u003eThe assembly accepts active and passive speed sensor interfaces used with the Trusted TMR speed monitoring architecture. LED indicators provide local indication of field power integrity. The SIFTA is intended for connection to the T8442 Speed Monitor Module through the Trusted system architecture.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many speed input channels does the T8846 provide?\u003c\/strong\u003e\u003cbr\u003eA: The T8846 provides 9 speed input channels arranged as 3 groups of 3.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What field power arrangement is provided for the speed inputs?\u003c\/strong\u003e\u003cbr\u003eA: The assembly provides dual 24 VDC feeds that are diode-commoned, with each channel protected by a 50 mA fuse.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the T8846 provide electrical isolation between input groups?\u003c\/strong\u003e\u003cbr\u003eA: Yes. The supplied specifications state electrical isolation between the input groups and the system backplane.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cp\u003eInstall the T8846 on the specified DIN rail with adequate mechanical retention. Route speed sensor wiring separately from high-current switching conductors and other sources of electromagnetic interference. Maintain appropriate separation between individual sensor groups where the installation requires fault segregation.\u003c\/p\u003e\n\u003cp\u003eTerminate cable shields according to the grounding scheme specified for the Trusted system. Avoid creating unintended ground loops through shield connections. Verify sensor polarity, field supply wiring, fuse continuity, and terminal assignments before energizing the assembly.\u003c\/p\u003e\n\u003cp\u003eConfirm that the connected speed sensors are compatible with the T8442 Speed Monitor Module and the T8846 input interface. After wiring, verify the field-power LED indications and inspect each channel for abnormal wiring resistance or short-circuit conditions before placing the speed monitoring loop into service.\u003c\/p\u003e","brand":"ICS Triplex","offers":[{"title":"Default Title","offer_id":44042845388890,"sku":"T8846","price":123.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/4601\/3530\/files\/ICSTriplexPS01-B_433e4501-8d36-42a6-a299-d449ae41bcce.jpg?v=1788769867","url":"https:\/\/www.plcmasters.com\/products\/ics-triplex-t8846-speed-input-field-terminal-assembly","provider":"PLC Masters Ltd.","version":"1.0","type":"link"}