Description

ABB TU837V1 3BSE013238R1 Extended Module Termination Unit

Configured for ModuleBus distribution, I/O addressing, and field terminal interfacing, the ABB TU837V1 3BSE013238R1 (TU837V1 Extended Module Termination Unit) provides the physical connection between compatible S800 I/O modules and process wiring. It supports up to 8 I/O channels, with a maximum rated voltage of 250 V and maximum current of 3 A per channel.

Hardware Specifications

Parameter	Specification
Model	TU837V1
Article Number	3BSE013238R1
Brand	ABB
Product Type	Extended Module Termination Unit
Origin	Not specified in supplied data
Module Type	Extended
Connection	Terminal block
Channels	8
Maximum Rated Voltage	250 V
Maximum Current per I/O Channel	3 A
Maximum Current Process Connection	10 A
Process Connections	28; up to 8 I/O channels with 2 terminals per channel; 2 x 6 power common terminals
I/O Configuration	Single
Compatible I/O	DO820, DO821
ModuleBus Function	Distributes ModuleBus to the I/O module and next MTU
Address Function	Generates the I/O module address by shifting outgoing position signals
Mounting	Standard DIN rail, both directions
Mechanical Latch	DIN rail locking latch, screwdriver release
Mechanical Keys	2 keys, 6 positions each; 36 possible configurations
Dielectric Test Voltage	2000 V AC
Weight	0.26 kg
Dimensions	126 mm W x 64 mm D x 110 mm H, including connectors and terminals
Installed Width	120.5 mm edge to edge
Operating Temperature	0 to +55 deg C; approvals issued for +5 to +55 deg C
Storage Temperature	-40 to +70 deg C
Relative Humidity	5 to 95 %, non-condensing
Pollution Degree	Degree 2, IEC 60664-1
Corrosion Protection	ISA-S71.04: G3
Protection Class	IP20, IEC 60529
Mechanical Conditions	IEC/EN 61131-2
EMC	EN 61000-6-4, EN 61000-6-2
Electrical Safety	EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201
Overvoltage Category	IEC/EN 60664-1, EN 50178
Equipment Class	Class I according to IEC 61140
Marine Certification	ABS, BV, DNV-GL, LR
CE Mark	Yes
RoHS Compliance	EN 50581:2012
WEEE Compliance	Directive 2012/19/EU

ModuleBus Distribution and I/O Addressing

The TU837V1 distributes the ModuleBus from the connected I/O module toward the next MTU. It also generates the correct module address through mechanical position signaling.

The MTU shifts outgoing position signals to the next termination unit. Therefore, the physical MTU position contributes to the I/O module addressing sequence.

The unit supports up to 8 I/O channels and provides two terminals per channel. Additionally, two groups of six power common terminals support the specified process connection arrangement.

The TU837V1 uses two mechanical configuration keys. Each key provides six selectable positions, producing 36 possible mechanical configurations. These keys identify the intended I/O module arrangement mechanically and do not alter the electrical functionality of the MTU or I/O module.

Mechanical Installation and Wiring

The MTU mounts directly on a standard DIN rail. A mechanical latch secures the unit to the rail, while a screwdriver releases the latch during removal.

For signal wiring, the specified conductor ranges are:

• Solid signal conductor: 0.2 to 6 mm2
• Stranded signal conductor: 0.2 to 4 mm2
• Signal conductor range: 24 to 10 AWG
• Signal terminal torque: 0.5 to 0.6 Nm
• Signal stripping length: 8 mm
• Solid return conductor: 0.2 to 4 mm2
• Stranded return conductor: 0.2 to 2.5 mm2
• Return conductor range: 24 to 12 AWG
• Return terminal torque: 0.5 to 0.6 Nm
• Return stripping length: 7 mm

Frequently Asked Questions (FAQ)

Q: How many I/O channels does the TU837V1 support?

A: The TU837V1 supports up to 8 I/O channels, with a maximum rated current of 3 A per channel.

Q: How does the TU837V1 generate the I/O module address?

A: The MTU shifts outgoing position signals to the next MTU, thereby generating the correct address according to its physical position.

Q: Do the two mechanical keys change the electrical operation of the I/O module?

A: No. The two keys provide mechanical configuration only. Each key has six positions, giving 36 possible mechanical configurations without changing electrical functionality.

Field Installation Guidelines

1. Mount the TU837V1 on a compatible standard DIN rail and verify that the mechanical latch fully engages.
2. Release the DIN rail latch with a screwdriver when removing the MTU.
3. Configure the two mechanical keys according to the intended I/O module arrangement.
4. Verify the selected key positions before installing the compatible I/O module.
5. Connect signal and return conductors within the specified conductor-size ranges.
6. Apply 0.5 to 0.6 Nm terminal torque to the specified signal and return connections.
7. Maintain the specified stripping lengths of 8 mm for signal connections and 7 mm for return connections.
8. Route field wiring separately from high-energy switching conductors where the installation requires noise reduction.
9. Verify the ModuleBus connection between the I/O module, TU837V1, and adjacent MTU before energizing the assembly.
10. Confirm that the installation environment remains within the specified temperature, humidity, pollution, EMC, and IP20 conditions.

Specifications

• Brand: ABB

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems