ABB 3BSE013238R1 TU837V1 Extended Module Termination Unit 250V Fused for S800 I/O

The complete ABB product number is 3BSE013238R1, while the corresponding ABB type designation is TU837V1. The unit is specifically associated with the S800 I/O architecture and is listed for use with ABB DO820 and DO821 I/O modules.

Product Identification

• Manufacturer: ABB
• Product Number: 3BSE013238R1
• ABB Type Designation: TU837V1
• Product Type: Extended Module Termination Unit
• Connection Type: Terminal Block
• Number of I/O Channels: Up to 8
• Maximum Rated Voltage: 250V
• Maximum Current per I/O Channel: 3A
• Maximum Process Connection Current: 10A
• Compatible I/O Modules: DO820 and DO821
• I/O Configuration: Single I/O
• System Family: ABB S800 I/O

ABB 3BSE013238R1 Overview

The ABB 3BSE013238R1 provides a terminal and interface solution for compatible ABB S800 I/O modules. As a Module Termination Unit, the TU837V1 connects field-side wiring to the I/O module and distributes the ModuleBus connection to the I/O module and onward to the next MTU in the installation.

The TU837V1 is an extended design capable of supporting up to eight I/O channels. Each channel has dedicated terminals, while additional terminals are provided for process power and process voltage return connections.

The unit is particularly suited to installations where isolated field-signal connections and fused channel arrangements are required.

TU837V1 Module Termination Unit

The TU837V1 is part of ABB’s S800 I/O Module Termination Unit range. Its primary role is to provide the electrical and mechanical interface between the field wiring and the associated electronic I/O module.

Unlike an active input or output module, the MTU is primarily an interface and termination component. It organizes field connections, distributes required system connections, and provides the appropriate terminal structure for the supported I/O module.

The TU837V1 is specified as an extended MTU with eight available I/O channels and a maximum rated voltage of 250V.

Eight I/O Channels

The ABB 3BSE013238R1 supports up to 8 I/O channels. Each I/O channel uses two terminals, providing a structured connection point for the corresponding field circuit.

The product data specifies 28 process connections in total. These include the connections for up to eight I/O channels together with additional power common terminals.

This arrangement makes the TU837V1 suitable for compact field termination in S800 I/O installations.

250V Rated Voltage

The TU837V1 has a maximum rated voltage of 250V. This rating is an important selection parameter when matching the MTU with the field circuits and associated I/O module.

The maximum current specification is 3A per I/O channel, while the maximum process connection current is specified as 10A.

The field wiring and connected devices should remain within the applicable electrical limits of the complete S800 I/O configuration.

Fused Isolated Signal Connections

One of the defining characteristics of the ABB 3BSE013238R1 is its fused isolated signal architecture. ABB describes the TU837V1 as providing up to eight individually isolated channels of field signals and process power connections.

Each channel has two terminals, with one terminal incorporating a fuse arrangement. This provides an organized method of connecting and protecting individual field circuits within the supported configuration.

The isolated channel structure also allows a combination of isolated and grouped channels depending on the system wiring arrangement.

Process Voltage Return

The TU837V1 provides process voltage return connections that can be arranged into two individually isolated groups. ABB technical information identifies two groups of six power common terminals for this purpose.

These connections provide additional flexibility when organizing field-side power and signal-return circuits.

The exact wiring configuration should correspond to the selected I/O module and the engineering design of the S800 I/O station.

Compatibility with DO820 and DO821

ABB identifies the TU837V1 for use with the DO820 and DO821 I/O modules.

This compatibility is an important distinction when selecting an S800 I/O termination unit. Other ABB MTUs may have similar physical characteristics while being designed for different input or output modules.

The complete I/O module type and the MTU product number should therefore be checked together when configuring or maintaining an S800 I/O station.

ModuleBus Interface

The TU837V1 distributes the ModuleBus connection to the associated I/O module and to the next MTU. It also generates the appropriate address information for the I/O module by shifting outgoing position signals to the next MTU.

This allows the termination unit to form part of the larger S800 I/O module chain while maintaining the required module position and communication structure.

Correct connection of the ModuleBus is therefore an important part of the S800 I/O installation.

Mechanical Keying

The ABB TU837V1 incorporates mechanical keying to help prevent insertion of an incompatible I/O module. ABB documentation describes two mechanical keys, each with six positions, providing a total of 36 possible configurations.

The keying arrangement is mechanical rather than an electronic configuration parameter. Its purpose is to reduce the possibility of installing an incorrect I/O module into the corresponding termination-unit position.

DIN Rail Installation

The ABB 3BSE013238R1 is designed for DIN rail mounting. It incorporates a mechanical latch that locks the MTU to the DIN rail and can be released with a screwdriver.

The latching arrangement also contributes to the grounding connection between the unit and the DIN rail.

The TU837V1 can be mounted in both directions according to the ABB product data.

Terminal Block Connection

The TU837V1 uses a terminal-block connection arrangement. ABB specifies signal connection wire sizes of 0.2 to 6 mm² for solid conductors and 0.2 to 4 mm² for stranded conductors.

For return connections, the specified wire sizes are 0.2 to 4 mm² for solid conductors and 0.2 to 2.5 mm² for stranded conductors. ABB also specifies recommended terminal torque values of 0.5 to 0.6 Nm.

Electrical Isolation

The TU837V1 supports individually isolated field-signal channels. This structure allows the connected field circuits to be organized into separate electrical groups.

The isolated-channel architecture is particularly relevant in industrial automation systems where field devices may have different circuit references or where electrical separation is required between signal groups.

The final isolation arrangement should always be considered together with the associated I/O module and the complete system wiring design.

Technical Specifications

Dimensions and Physical Design

The ABB TU837V1 has a width of approximately 126 mm including the connector, a depth of approximately 64 mm including terminals, and a height of approximately 110 mm. The ABB data sheet lists a weight of approximately 0.26 kg.

These dimensions should be considered when planning cabinet layouts and DIN rail spacing within an S800 I/O installation.

Environmental Specifications

The TU837V1 is specified for an operating temperature range of 0 to +55 °C and a storage temperature range of -40 to +70 °C. ABB also specifies a maximum ambient temperature of 55 °C.

The product has an IP20 protection class and is specified for pollution degree 2 environments. ABB documentation also identifies corrosion protection according to ISA-S71.04 G3.

Electrical and Safety Standards

ABB identifies electrical safety compliance with standards including EN 61010-1, UL 61010-1, EN 61010-2-201, and UL 61010-2-201. The product also has EMC references to EN 61000-6-4 and EN 61000-6-2.

The dielectric test voltage is specified as 2000V AC.

S800 I/O System Integration

The ABB 3BSE013238R1 is designed as part of the S800 I/O platform. The S800 architecture uses modular I/O components and Module Termination Units to provide organized field connections for industrial automation systems.

Within this structure, the TU837V1 supplies the physical termination interface for compatible I/O modules while also participating in the ModuleBus architecture.

The product is therefore an important interface component rather than a standalone controller or signal-processing module.

Industrial Automation Applications

Module Termination Units are used in industrial automation cabinets and distributed I/O stations where field signals must be connected to an automation system.

The ABB TU837V1 can be applied where compatible DO820 or DO821 modules are used and where up to eight I/O channels require terminal connections with isolated and fused field circuits.

Typical system environments can include process automation, industrial control cabinets, distributed I/O stations, and System 800xA-related S800 I/O architectures.

Maintenance and Replacement

When identifying an existing ABB TU837V1, the complete product number 3BSE013238R1 should be checked against the marking on the unit and the engineering documentation of the S800 I/O installation.

The corresponding ABB type designation TU837V1 provides an additional identification reference.

Before replacing the MTU, the connected I/O module should also be verified because the TU837V1 is specifically listed for use with DO820 and DO821.

Installation Considerations

The installation should take into account the maximum voltage, maximum current per channel, terminal arrangement, ModuleBus connections, mechanical keying, and DIN rail mounting requirements.

Field wiring should remain within the specified wire-size and electrical limits. ABB specifies a recommended terminal torque of 0.5 to 0.6 Nm for the relevant connections.

The electrical configuration should be checked before connecting field circuits to ensure that the MTU and associated I/O module correspond to the intended system design.

Inventory Identification

For industrial inventory and product catalogues, the recommended identification is:

• Brand: ABB
• Part Number: 3BSE013238R1
• Type: TU837V1
• Description: Extended Module Termination Unit 250V Fused
• Channels: Up to 8 I/O channels
• System: ABB S800 I/O
• Compatible I/O: DO820 and DO821

Using both the ABB product number and TU837V1 designation helps distinguish this termination unit from similar S800 I/O MTUs with different voltage ratings, channel arrangements, or module compatibility.

Product Identification for Online Catalogues

A suitable technical product name for an industrial product catalogue is:

ABB 3BSE013238R1 TU837V1 Extended Module Termination Unit 250V Fused

Useful search variations include ABB 3BSE013238R1, ABB TU837V1, ABB TU837V1 MTU, ABB 3BSE013238R1 Module Termination Unit, ABB S800 I/O TU837V1, and ABB 250V Fused MTU.

Part Number Verification

The complete product identification is ABB 3BSE013238R1. ABB identifies this part number as the TU837V1 Extended Module Termination Unit. The official ABB hardware selector specifies eight channels, a 250V maximum rated voltage, and compatibility with DO820 and DO821.

ABB documentation also describes the TU837V1 as an extended Module Termination Unit with fused isolated signals, eight L terminals, and two groups of six N terminals.

Conclusion

The ABB 3BSE013238R1 is the TU837V1 Extended Module Termination Unit for the ABB S800 I/O system. It provides up to eight I/O channels, individually isolated field-signal connections, fused channel arrangements, process voltage return connections, and ModuleBus interfaces.

With a maximum rated voltage of 250V and a maximum current of 3A per I/O channel, the TU837V1 is designed for compatible S800 I/O configurations, specifically including ABB DO820 and DO821 modules.

For technical cataloguing and search purposes, the recommended identification is ABB 3BSE013238R1 TU837V1 Extended Module Termination Unit 250V Fused.