ABB|TU849|Redundant Module Termination Unit
ABB TU849 3BSE042560R1 Redundant Module Termination Unit
Description
ABB TU849 is a redundant module termination unit designed for use with TB840/TB840A optical modems in non-redundant I/O systems with dual power supply support.
Features
- Supports dual power supply for increased reliability
- Rotary switch for cluster address setting (1–7)
- Mechanical keying with 36 configuration options
- Single ModuleBus connection for system integration
- Latching DIN rail mount for secure grounding
Technical Specifications
- Type: Module Termination Unit (MTU)
- Function: Non-redundant I/O with redundant TB840/TB840A modules
- Power Input: Dual 24 V DC (19.2–30 V)
- ModuleBus Distribution: Max 5 V / 1.5 A, 24 V / 1.5 A
-
Wire Size Compatibility:
- Solid: 0.2–2.5 mm²
- Stranded: 0.2–2.5 mm² (24–12 AWG)
- Torque Requirement: 0.5 Nm
- Insulation Voltage: 50 V rated
- Dielectric Test Voltage: 500 V AC
- Power Dissipation: 2.5 W
- Operating Temperature: 0 to +55 °C
- Storage Temperature: -40 to +70 °C
- Humidity: 5–95% non-condensing
- Certifications: CE, UL, cULus, ATEX, ABS, BV, DNV-GL, LR
- Protection Class: IP20
- RoHS Compliant: Yes
-
Dimensions:
- Width: 124 mm
- Height: 186.5 mm (with latch)
- Depth: 47 mm
- Weight: 0.45 kg
ABB|TU849|Redundant Module Termination Unit



ABB|TU849|Redundant Module Termination Unit
ABB TU849 3BSE042560R1 Redundant Module Termination Unit
Description
ABB TU849 is a redundant module termination unit designed for use with TB840/TB840A optical modems in non-redundant I/O systems with dual power supply support.
Features
- Supports dual power supply for increased reliability
- Rotary switch for cluster address setting (1–7)
- Mechanical keying with 36 configuration options
- Single ModuleBus connection for system integration
- Latching DIN rail mount for secure grounding
Technical Specifications
- Type: Module Termination Unit (MTU)
- Function: Non-redundant I/O with redundant TB840/TB840A modules
- Power Input: Dual 24 V DC (19.2–30 V)
- ModuleBus Distribution: Max 5 V / 1.5 A, 24 V / 1.5 A
-
Wire Size Compatibility:
- Solid: 0.2–2.5 mm²
- Stranded: 0.2–2.5 mm² (24–12 AWG)
- Torque Requirement: 0.5 Nm
- Insulation Voltage: 50 V rated
- Dielectric Test Voltage: 500 V AC
- Power Dissipation: 2.5 W
- Operating Temperature: 0 to +55 °C
- Storage Temperature: -40 to +70 °C
- Humidity: 5–95% non-condensing
- Certifications: CE, UL, cULus, ATEX, ABS, BV, DNV-GL, LR
- Protection Class: IP20
- RoHS Compliant: Yes
-
Dimensions:
- Width: 124 mm
- Height: 186.5 mm (with latch)
- Depth: 47 mm
- Weight: 0.45 kg