{"product_id":"extended-module-termination-unit-abb-tu837v1-s800","title":"Extended Module Termination Unit | ABB TU837V1 S800","description":"\u003ch2\u003eABB TU837V1 3BSE013238R1 Extended Module Termination Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB TU837V1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e3BSE013238R1\u003c\/strong\u003e Extended Module Termination Unit, operates as a dedicated hardware component for field signal termination and address distribution within ABB S800 I\/O platforms. Supporting up to 8 individually isolated I\/O channels rated at 250 V and 3 A per channel, the unit provides the physical wiring interface for DO820 and DO821 relay output modules. The termination base distributes ModuleBus power and data to the attached I\/O module while shifting position signals to derive the correct address for the next adjacent MTU along the DIN rail.\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\u003eTU837V1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eAustralia\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.28 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e126 mm x 110 mm x 64 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003eUp to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive base structure (Driven by ModuleBus and field loops)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Count\u003c\/td\u003e\n\u003ctd\u003eUp to 8 individually isolated channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Voltage\u003c\/td\u003e\n\u003ctd\u003e250 V max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChannel Current\u003c\/td\u003e\n\u003ctd\u003e3 A max per channel (10 A max process connection)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Withstand\u003c\/td\u003e\n\u003ctd\u003e2000 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Modules\u003c\/td\u003e\n\u003ctd\u003eDO820, DO821\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTerminal Screw Torque\u003c\/td\u003e\n\u003ctd\u003e0.5 to 0.6 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Keying\u003c\/td\u003e\n\u003ctd\u003eDual 6-position keys (36 total configurations)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eBackplane Bus Communication Velocity and Mechanical Keying\u003c\/h3\u003e\n\u003cp\u003eThe TU837V1 handles ModuleBus distribution, passing high-speed backplane signals through to downstream S800 termination units without transmission decay. Positional address logic shifts internal control signals automatically as each MTU attaches to the chain, enabling deterministic I\/O scanning across the backplane bus. Dual 6-position mechanical keying wheels enforce hardware-level lockout against incorrect I\/O module insertion, preventing field-side cross-wiring faults before system initialization.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: Does the mechanical keying arrangement on the TU837V1 affect module communication or addressing?\u003c\/p\u003e\n\u003cp\u003eA: No. The two 6-position keying wheels provide physical slot keying only. They prevent the insertion of incompatible I\/O modules into the base unit and do not alter electrical continuity or ModuleBus addressing.\u003c\/p\u003e\n\u003cp\u003eQ: Can the TU837V1 be unlatched from the DIN rail while field wiring remains connected?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The base unit features an accessible mechanical latch that releases via a flathead screwdriver, allowing physical disengagement from standard 35 mm DIN rails without disrupting adjacent MTU physical alignment.\u003c\/p\u003e\n\u003cp\u003eQ: Is the TU837V1 compatible with redundant S800 I\/O module pairs?\u003c\/p\u003e\n\u003cp\u003eA: No. The TU837V1 is designed strictly as a single-I\/O base unit. Redundant I\/O configurations require dual-channel base units such as the TU830 or TU833.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIN Rail Mounting\u003c\/strong\u003e: Snap the TU837V1 directly onto a standard 35 mm DIN rail (EN 50022). Ensure the spring-loaded bottom latch clicks firmly to establish a secure mechanical lock and ground earth plane contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeying Configuration\u003c\/strong\u003e: Rotate the two mechanical keying wheels to match the specific keying code designated for the target I\/O module (e.g., DO820 or DO821) prior to inserting the electronic module.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField Wire Termination\u003c\/strong\u003e: Strip signal wires to 8 mm and return wires to 7 mm. Insert wire ends into the screw terminals (solid 0.2 to 6 mm squared, stranded 0.2 to 4 mm squared \/ 24 to 10 AWG) and tighten terminal screws to a torque between 0.5 and 0.6 Nm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModuleBus Interconnection\u003c\/strong\u003e: Align the side ModuleBus edge connectors when placing adjacent MTUs side-by-side to guarantee uninterrupted backplane power and signal propagation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModule Insertion\u003c\/strong\u003e: Guide the S800 I\/O module straight down into the MTU guide slots until the top retaining latches snap into place.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53016906563896,"sku":"TU837","price":188.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0893\/1616\/3896\/files\/652..jpg?v=1790213402","url":"https:\/\/www.automodulexpert.com\/products\/extended-module-termination-unit-abb-tu837v1-s800","provider":"AutoModuleXpert Ltd.","version":"1.0","type":"link"}