Configured for field signal distribution and termination routing in S800 I/O platforms, the ABB TU833 (3BSE038726R1 Crimp Snap-in connector) provides direct physical/electrical execution.

Part Number Breakdown & Configuration Matrix

• Base Model Designation: TU833
• Full Catalog Part Number: 3BSE038726R1
• Hardware Classification: Extended Module Termination Unit (MTU)
• Termination Style: Crimp Snap-in connector

Hardware Specifications

PLC and DCS Integration Architecture

• Backplane Bus Communication Velocity: Distributes the ModuleBus to the connected I/O module and bridges data lines to the subsequent MTU while shifting outgoing position signals for correct node addressing.
• I/O Density Scaling: Manages up to 16 channels of field signals and process power connections, supporting individual isolation across dual voltage groups protected by 6.3 A fuses.
• Firmware Flash Compatibility: Transparent physical connection substrate requiring no active firmware layers.
• Network Determinism: Maintains low-impedance deterministic signal propagation paths across distributed I/O racks.

Ordering Information

• 1 x TU833 3BSE038726R1 Crimp Snap-in connector MTU base
• Integrated terminal layout without active electronic modules

Field Installation Guidelines

• DIN-Rail and Slot Mounting: Snap the unit securely onto standard DIN rails in either mounting direction, ensuring the latching device achieves proper grounding contact.
• Signal Wiring & Shielding: Terminate 3-wire field connections using crimp snap-in methods, keeping low-level signal loops separated from high-voltage distribution paths.
• Mechanical Keying Verification: Inspect built-in mechanical keying features prior to module insertion to prevent incorrect hardware mounting.
• Fuse and Power Setup: Configure individual process voltage groups according to application load requirements using appropriate protective fusing.

Frequently Asked Questions

• How many total I/O channels are supported on the TU833 unit?

  The terminal unit accommodates up to 16 independent I/O channels.

• What type of field connection mechanism is utilized?

  It employs a crimp snap-in connector architecture for secure wire termination.

• What is the maximum voltage rating for the unit?

  The maximum rated voltage across the terminals is 50 V.

• What current limits apply to individual channels and process lines?

  Each channel supports a maximum current of 2 A, while total process connection current reaches up to 5 A.

• How are the process voltage groups protected?

  Process voltage can be distributed to two individually isolated groups, each protected by a 6.3 A fuse.

• What role does the MTU play regarding ModuleBus communication?

  It distributes the ModuleBus to the local I/O module and forwards signals to the next MTU while generating correct hardware addresses.

• What are the physical weight and shipping dimensions?

  The unit weighs 0.3 kg with shipping envelope dimensions of 12.7 x 11.6 x 6.6 cm.

• What safety test voltage is specified for insulation checking?

  The dielectric test voltage is rated at 500 V a.c.