{"product_id":"redundant-module-termination-unit-abb-s800-i-o-module-tu844-3bse021445r1","title":"Redundant Module Termination Unit ABB S800 I\/O Module TU844 3BSE021445R1","description":"\u003ch2\u003eABB TU844 3BSE021445R1 Redundant Module Termination Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB TU844 3BSE021445R1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003eTU844\u003c\/strong\u003e Redundant Module Termination Unit, provides physical signal termination and ModuleBus distribution for ABB S800 I\/O modules including AI845, AI880, AI880A, and DP840 configurations.\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\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\u003eTU844 3BSE021445R1\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\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eRedundant Module Termination Unit (MTU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.6 kg (1.3 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eWidth: 131 mm including connector; Depth: 64 mm including terminals; Height: 186.5 mm including locking device\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +55 deg C (+32 to +131 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003ePassive MTU design; power consumption generated by connected I\/O modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConfiguration Type\u003c\/td\u003e\n\u003ctd\u003eRedundant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Type\u003c\/td\u003e\n\u003ctd\u003eTerminal block\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eI\/O Channels\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcess Voltage Connections\u003c\/td\u003e\n\u003ctd\u003e2 + 2 process voltage connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Voltage Rating\u003c\/td\u003e\n\u003ctd\u003e50 V per channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Current Rating\u003c\/td\u003e\n\u003ctd\u003e2 A per I\/O channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Process Connection Current\u003c\/td\u003e\n\u003ctd\u003e5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible I\/O Modules\u003c\/td\u003e\n\u003ctd\u003eAI845, AI880, AI880A, DP840\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Method\u003c\/td\u003e\n\u003ctd\u003eHorizontal DIN rail mounting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModuleBus Distribution\u003c\/td\u003e\n\u003ctd\u003eDual ModuleBus distribution to I\/O module and next MTU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Selection\u003c\/td\u003e\n\u003ctd\u003eVoltage or current input selection through TY801 shunt sticks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDielectric Test Voltage\u003c\/td\u003e\n\u003ctd\u003e500 V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Size\u003c\/td\u003e\n\u003ctd\u003eSolid: 0.2 - 4 mm2; Stranded: 0.2 - 2.5 mm2, 24 - 12 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Terminal Torque\u003c\/td\u003e\n\u003ctd\u003e0.5 - 0.6 Nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Stripping Length\u003c\/td\u003e\n\u003ctd\u003e7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP20 according to IEC 60529\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5 to 95 %, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e-40 to +70 deg C (-40 to +158 deg F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePollution Degree\u003c\/td\u003e\n\u003ctd\u003eDegree 2, IEC 60664-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorrosion Protection\u003c\/td\u003e\n\u003ctd\u003eISA-S71.04 G3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEMC Compliance\u003c\/td\u003e\n\u003ctd\u003eEN 61000-6-4, EN 61000-6-2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical Safety Standards\u003c\/td\u003e\n\u003ctd\u003eEN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHazardous Location Certification\u003c\/td\u003e\n\u003ctd\u003eC1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMarine Certification\u003c\/td\u003e\n\u003ctd\u003eABS, BV, DNV-GL, LR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoHS Compliance\u003c\/td\u003e\n\u003ctd\u003eEN 50581:2012\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWEEE Compliance\u003c\/td\u003e\n\u003ctd\u003eDirective 2012\/19\/EU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eABB S800 I\/O ModuleBus Signal Distribution\u003c\/h3\u003e\n\u003cp\u003eThe TU844 provides electrical termination and routing functions for redundant ABB S800 I\/O installations. It distributes two ModuleBuses, with one bus assigned to each I\/O module and the outgoing connection extended to the next MTU.\u003c\/p\u003e\n\u003cp\u003eThe unit generates module addressing by shifting outgoing position signals through the MTU chain. Therefore, connected I\/O modules receive the correct hardware position information without additional software configuration.\u003c\/p\u003e\n\u003cp\u003eThe TU844 supports eight I\/O channels, where each channel contains two I\/O terminals and one ZP connection. Additionally, TY801 individual shunt sticks define the input mode between voltage and current signals. The channel design supports a maximum rated voltage of 50 V and a maximum rated current of 2 A.\u003c\/p\u003e\n\u003cp\u003eThe mechanical key system configures compatibility between the MTU and installed I\/O modules. Each I\/O module position uses two mechanical keys, and each key provides six positions. Therefore, the configuration system supports 36 possible mechanical combinations without changing electrical functionality.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What I\/O modules can be connected to the ABB TU844 3BSE021445R1?\u003c\/p\u003e\n\u003cp\u003eA: The TU844 supports ABB S800 I\/O modules including AI845, AI880, AI880A, and DP840 modules in redundant configurations.\u003c\/p\u003e\n\u003cp\u003eQ: How does the TU844 select voltage or current input signals?\u003c\/p\u003e\n\u003cp\u003eA: The input selection is performed through individual TY801 shunt sticks. The shunt stick defines whether the channel operates with voltage or current input signals.\u003c\/p\u003e\n\u003cp\u003eQ: Can the TU844 be installed on a standard DIN rail?\u003c\/p\u003e\n\u003cp\u003eA: Yes. The TU844 uses horizontal DIN rail mounting and includes a mechanical latch that locks the MTU to the rail.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the TU844 on a standard DIN rail with the locking mechanism fully engaged before wiring.\u003c\/li\u003e\n\u003cli\u003eVerify that the mechanical key positions match the installed ABB S800 I\/O module type before commissioning.\u003c\/li\u003e\n\u003cli\u003eUse approved terminal wiring methods and maintain correct conductor preparation according to the specified wire range.\u003c\/li\u003e\n\u003cli\u003eSeparate signal wiring from high-current power cables to reduce electrical interference.\u003c\/li\u003e\n\u003cli\u003eConnect cable shields according to the plant grounding standard when shielded instrumentation wiring is used.\u003c\/li\u003e\n\u003cli\u003eConfirm TY801 shunt stick positions before applying field signals to prevent incorrect voltage or current input configuration.\u003c\/li\u003e\n\u003cli\u003eInspect ModuleBus connections between adjacent MTUs before system power-up.\u003c\/li\u003e\n\u003cli\u003eMaintain environmental limits for temperature, humidity, pollution degree, and enclosure protection during installation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":44632903549016,"sku":"TU844 3BSE021445R1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/TU844-3BSE021445R1-3_1200x1200_385a55fd-d159-45b2-be39-5630b860bb2a.jpg?v=1787300297","url":"https:\/\/www.industriaxplc.com\/products\/redundant-module-termination-unit-abb-s800-i-o-module-tu844-3bse021445r1","provider":"IndustriaX Limited","version":"1.0","type":"link"}