Description

ABB TU813 Compact Module Termination Unit

The ABB TU813 3BSE036714R1, also cataloged as the TU813 Compact Module Termination Unit, provides the physical interface between field wiring and compatible I/O modules within the ABB S800 I/O system.

Hardware Specifications

Parameter	Specification
Model	TU813
Article Number	3BSE036714R1
Brand	ABB
Product Type	Compact Module Termination Unit (MTU)
Number of Channels	8
Maximum Rated Voltage	250 V
Maximum Current per Channel	3 A
Field Connections	Crimp snap-in connectors, 3 rows
Compatible I/O Modules	DI820, DI821, DI825, DO820, DO821, AI825
Wire Sizes	0.2 - 0.5 mm2, 0.5 - 1.0 mm2, 1.5 - 2.5 mm2
Mounting	DIN rail, horizontal or vertical
Operating Temp	0 deg C to +55 deg C
Storage Temp	-40 deg C to +70 deg C
Relative Humidity	5% to 95%, non-condensing
Protection Class	IP20, IEC 60529
Dimensions	64 mm x 64 mm x 170 mm
Weight	0.17 kg
Power Consumption	Not specified in supplied data
Certifications / Standards	CE, EN 61010-1, UL 61010-1, ATEX Zone 2, RoHS, WEEE

ABB S800 ModuleBus and I/O Interface

The TU813 distributes ModuleBus power and data to the installed I/O module. It also passes the ModuleBus connection downstream to the next MTU. Therefore, the unit functions as a passive physical termination and distribution assembly rather than an active I/O processing module.

The unit provides eight field signal channels and supports a maximum rated voltage of 250 V with a maximum current of 3 A per channel. Furthermore, three rows of crimp snap-in connectors provide the specified field wiring interface.

Mechanical keying uses two keys with six positions each. This arrangement provides 36 possible key combinations and restricts insertion to the intended compatible I/O module configuration.

Frequently Asked Questions (FAQ)

Q: What I/O modules are specified for use with the TU813?

A: The supplied data lists DI820, DI821, DI825, DO820, DO821, and AI825 as compatible I/O modules.

Q: Does the TU813 process I/O signals?

A: No. The TU813 operates as a passive Module Termination Unit. It provides field wiring termination, ModuleBus distribution, module addressing through position signal shifting, and mechanical keying.

Q: What mounting arrangement does the TU813 support?

A: The TU813 mounts on a DIN rail and supports horizontal or vertical installation. The integrated latching mechanism secures the unit to the rail.

Field Installation Guidelines

• Install the TU813 on a suitable DIN rail in the specified horizontal or vertical orientation.
• Verify the mechanical key configuration before inserting an I/O module.
• Use field conductors within the supplied wire-size ranges and terminate them with the specified crimp snap-in connectors.
• Keep field signal wiring separated from high-energy conductors where practical to reduce electrical interference.
• Route wiring so that connector terminals remain accessible for inspection and maintenance.
• Verify protective grounding and DIN rail bonding according to the installation design and applicable electrical standards.
• Confirm that the installed I/O module matches the TU813 compatibility list before energizing the assembly.
• Maintain the specified operating temperature and non-condensing humidity limits.
• Do not treat the IP20 enclosure as protection against water, dust ingress, or other environmental exposure beyond its stated rating.

Specifications

• Brand: ABB

Advantages

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