ABB TU838 Extended MTU 3BSE008572R1

Overview

The TU838 is a 16-channel, 50 V extended module termination unit (MTU) designed for the ABB S800 I/O system. It connects field wiring to I/O modules and integrates with the ModuleBus. This passive unit facilitates the distribution of process power and ModuleBus signals, providing a stable connection for a variety of I/O modules such as AI810, AI815, AI845, DI810, DI811, DI814, DI830, DI831, DI840, and DO814. The TU838 ensures efficient wiring, fuse protection, and mechanical keying for proper module placement.

Technical Specifications:

• Model: ABB TU838 Extended MTU
• Rated Maximum Voltage: 50 V
• Maximum Current per Channel: 3 A
• Fuse Rating: 100 mA (delivered), Max 3.5 A (field)
• Process Voltage Connections: 8 fused power outlets, 4 return connections.
• Rated Continuous Current (Process Voltage): 10 A
• ModuleBus Current Distribution: Max 1.5 A (24 V), 1.5 A (5 V)
• Stripped Wire Size: 0.2 – 4 mm² (solid), 0.2 – 2.5 mm² (stranded)
• Protection Rating: IP20 (IEC 60529)
• Mounting: Standard DIN rail, mechanical latch lock.
• Width: 126 mm (5”), Height: 110 mm (4.3”), Depth: 64 mm (2.52”)
• Weight: 0.26 kg (0.57 lbs.)
• Insulation Voltage: 50 V

FAQ:

1. What is the purpose of mechanical keying on the 3BSE008572R1?
   • Mechanical keying prevents incorrect installation of I/O modules by providing 36 unique configuration combinations.
2. What is the current rating for each channel?
   • Each channel supports up to 3 A of continuous current.
3. How is the 3BSE008572R1 mounted?
   • It mounts easily on a standard DIN rail and is secured with a mechanical latch for grounding.

For more detailed information, please check official datasheet: S800_I_O_Modules_and_Termination_Units