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ABB TU835V1 Extended Module Termination Unit

The ABB TU835V1, also cataloged as the TU835V1 Extended Module Termination Unit, provides field termination, ModuleBus distribution, and position-address generation for ABB S800 I/O modules. It supports up to 8 I/O channels with a maximum rated voltage of 50 V and maximum current of 2 A per channel.

Hardware Specifications

Parameter	Specification
Model	TU835V1
Article Number	3BSE013236R1
Brand	ABB
Product Type	Extended Module Termination Unit
Origin	Not specified in supplied data
Weight	0.26 kg
Dimensions	126 mm W x 110 mm H x 64 mm D, including connector and terminals
Operating Temp	0 to +55 deg C
Storage Temp	-40 to +70 deg C
Channels	8 I/O channels
Maximum Rated Voltage	50 V
Maximum Current per I/O Channel	2 A
Maximum Current at Process Connection	8 A
Connection	Terminal block
Mounting	Standard DIN rail
Mounting Direction	Both directions
Supported I/O	AI810, AI815, AI845
Process Connections	16 I/O terminals, 4 process power terminals, 4 process power 0 V terminals
I/O Configuration	Single I/O
Wire Size, Solid	0.2 - 4 mm2
Wire Size, Stranded	0.2 - 2.5 mm2, 24 - 12 AWG
Recommended Terminal Torque	0.5 - 0.6 Nm
Wire Stripping Length	7 mm
Dielectric Test Voltage	500 V AC
Relative Humidity	5 - 95 %, non-condensing
Protection Class	IP20 according to IEC 60529
Pollution Degree	Degree 2, IEC 60664-1
Corrosion Protection	ISA-S71.04: G3
Mechanical Conditions	IEC/EN 61131-2
EMC	EN 61000-6-4, EN 61000-6-2
Overvoltage Category	IEC/EN 60664-1, EN 50178
Equipment Class	Class I according to IEC 61140
Power Consumption	Not specified in supplied data
CE Mark	Yes
Electrical Safety	EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201
Hazardous Location Approval	C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2
Marine Certification	ABS, BV, DNV-GL, LR
RoHS Compliance	EN 50581:2012
WEEE Compliance	Directive 2012/19/EU

ABB S800 ModuleBus and Address Distribution

The TU835V1 distributes the ModuleBus from the connected I/O module to the next MTU in the installation. At the same time, it generates the appropriate I/O module address by shifting outgoing position signals toward the next MTU.

The MTU supports mechanical configuration through two keys. Each key provides six positions, producing 36 possible mechanical configurations. This keying mechanism physically configures the MTU for compatible I/O module types without changing the electrical functionality of either the MTU or I/O module.

The unit supports AI810, AI815, and AI845 modules according to the supplied technical data. Therefore, the mechanical key positions should match the applicable I/O module configuration before installation.

Frequently Asked Questions (FAQ)

Q: How many I/O channels does the TU835V1 support?

A: The TU835V1 supports up to 8 I/O channels. Each channel has a maximum rated current of 2 A and a maximum rated voltage of 50 V.

Q: How does the TU835V1 generate the I/O module address?

A: The MTU generates the appropriate address by shifting the outgoing position signals to the next MTU.

Q: Does the mechanical key configuration change the electrical function of the MTU?

A: No. The two mechanical keys provide physical configuration for different I/O module types. The selected key positions do not change the electrical functionality of the MTU or I/O module.

Field Installation Guidelines

• Mount the TU835V1 on a compatible standard DIN rail and verify that the mechanical latch fully locks the unit.
• Release the DIN rail latch with a screwdriver when removing the MTU.
• Confirm that the two mechanical keys match the intended I/O module configuration before installation.
• Connect field wiring according to the terminal assignment and supported process connections.
• Keep wiring within the specified solid and stranded conductor ranges.
• Apply the specified terminal torque of 0.5 - 0.6 Nm during field wiring.
• Maintain the specified 7 mm conductor stripping length.
• Separate signal wiring from high-current or high-noise conductors where the installation requires electromagnetic interference control.
• Route shields and protective earth connections according to the plant grounding design and applicable electrical installation standards.
• Verify the 50 V maximum rated voltage and 2 A maximum current per I/O channel before energizing the circuit.
• Confirm that the ambient temperature remains within 0 to +55 deg C during operation.
• Inspect the terminal connections and mechanical latch before commissioning.

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