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ABB 3BSE020850R1 TU842 Redundant Terminal Block

ABB 3BSE020850R1 TU842 Redundant Terminal Block

Brand: ABB
Product Type: Redundant Terminal
Payment:T/T, Western Union
Shipping Port:Jinhua China
Lead Time:1-3 Working Days
Condition: Brand New And 100% Original
Warranty: 12 months

The TU842 MTU is a redundant terminal block designed for use with various I/O modules. Here are some key details and features:

General Info

  • Article Number: 3BSE020850R1
  • Type: Redundant
  • Connection: Terminal block
  • Channels: 16
  • Voltage: 50 V
  • Mounting: Horizontal (55 º)
  • Use with I/O: AI843, AO845, AO845A, DI840, DI880, DO840, DO880, and DP840
  • Process Connections: 56 up to 16 I/O channels (2 terminals per channel), 4 Process power, 20 Process power (0 V)
  • Single/Redundant I/O: Redundant

Detailed Data

  • Maximum Current per I/O Channel: 3 A
  • Maximum Current Process Connection: 10 A
  • Acceptable Wire Sizes:
    • Solid: 0.2 - 4 mm²
    • Stranded: 0.2 - 2.5 mm², 24 - 12 AWG
  • Recommended Torque: 0.5 - 0.6 Nm
  • Stripping Length: 7 mm
  • Dielectric Test Voltage: 500 V a.c.

Environment and Certification

  • CE Mark: Yes
  • Electrical Safety: IEC 61131-2, UL 61010-1, UL 61010-2-201
  • Hazardous Location: C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2
  • Marine Certification: ABS, BV, DNV-GL, LR
  • Protection Rating: IP20 according to IEC 60529
  • Corrosive Atmosphere: ISA-S71.04 G3
  • Climatic Operating Conditions: 0 to +55 °C (Storage -40 to +70 °C), RH=5 to 95% no condensation, IEC/EN 61131-2
  • Pollution Degree: Degree 2, IEC 60664-1
  • Mechanical Operating Conditions: IEC/EN 61131-2
  • EMC: EN 61000-6-4, EN 61000-6-2
  • Overvoltage Categories: IEC/EN 60664-1, EN 50178
  • Equipment Class: Class I according to IEC 61140 (earth protected)
  • RoHS Compliance: EN 50581:2012
  • WEEE Compliance: DIRECTIVE/2012/19/EU


  • Width: 131 mm (5.16”) including connector, 124 mm (4.88”) edge to edge installed
  • Depth: 64 mm (2.52”) including terminals
  • Height: 186.5 mm (7.34”) including locking device
  • Weight: 0.66 kg (1.3 lbs.)

Additional Information

The TU842 MTU can accommodate up to 16 I/O channels and 2+2 process voltage connections. Each channel has two I/O connections and one ZP connection. The maximum rated voltage is 50 V, and the maximum rated current is 3 A per channel.

The MTU serves to distribute the two ModuleBuses to each I/O module and to the next MTU. It also generates the correct address for the I/O modules by shifting the outgoing position signals to the next MTU.

The MTU can be easily mounted on a standard DIN rail and features a mechanical latch that securely locks it in place. Four mechanical keys, two for each I/O module, are used to configure the MTU for different types of I/O modules, offering a total of 36 different configurations.

Features and Benefits

  • Complete installation of I/O modules using 3-wire connections and field power distribution.
  • Supports up to 16 channels of field signals and process power connections.
  • Provides connections to two ModuleBuses and I/O modules.
  • Mechanical keying prevents the insertion of the wrong I/O module.
  • Secure latching device for DIN rail grounding.
  • DIN rail mounting for easy installation.

This TU842 MTU is designed to facilitate the efficient and reliable installation of I/O modules in various industrial applications.


FAQ & Contact:

Q: What is your business type?

A: We are a trading company.

Q: What is your typical lead time?

A: Our lead time is usually one to three days for in-stock products. For items not in stock, lead time can be negotiated.

Q: Do you provide product samples? Is there a fee for samples?

A: Sample availability and charges vary depending on the specific product and order quantity.

Q: What are your accepted payment terms?

A: We generally require 100% T/T (Telegraphic Transfer) payment before shipping. For larger quantities, payment terms are open to negotiation.


  1. For items in stock, we will ship them within 3 days of receiving payment.

  2. We offer worldwide shipping through reputable carriers such as DHL, UPS, FedEx, TNT, and EMS.

  3. If you have a preferred shipping agent, please inform us before shipment.

  4. We ensure secure and appropriate packaging for all parts. If you have any specific packaging requests, please let us know.

  5. Our shipping cutoff time is typically before 4:30 PM, and we will provide you with a tracking number once the shipment is processed. Delivery usually takes 7-15 days.

  6. Upon receiving the package, please notify us via email.

To facilitate accurate shipping cost estimates, kindly provide the following details:

  1. Your zip code.

  2. Your company name (if applicable) and your name.

  3. Your phone number and extension (if applicable).

Company Services:

  1. Fast delivery (In-stock products ship within 1-3 days).

  2. Extensive experience (Over 10 years of sales experience).

  3. Large inventory (We carry various brands and maintain overseas warehouses).

  4. Quality assurance (Our products come with a 1-year warranty and clear product condition).

Contact Us:

  • Phone: +86 18857985841

  • Email:

  • Skype: +86 18857985841

  • WhatsApp: 8618857985841

  • Business Hours: We Provide Online Support 24/7

  • Address: 1100 Linjiang East Road, Bailongqiao, Wucheng District, Jinhua City, Zhejiang Province

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