ABB TU715F 3BDH000378R0001｜Module Termination Unit｜

The ABB TU715F (Ordering Part Number: 3BDH000378R0001) is a Module Termination Unit (MTU) designed for the S700 I/O system, primarily utilized within the ABB Freelance Distributed Control System (DCS) platform.

It serves as the base socket and field wiring interface for 24 V DC digital and analog S700 I/O expansion modules.

Technical Specifications
Parameter Specification
Manufacturer ABB Automation
Product Type Module Termination Unit / I/O Terminal Unit
ABB Type Designation TU 715F
Ordering Code 3BDH000378R0001
System Compatibility S700 I/O Family (Freelance DCS)
Voltage Rating 24 V DC (Nominal)
Max Load Current 10 A
Terminal Connection Type Screw-type terminals (1/2 wire per connection point)
Supported Wire Size 0.08 mm² to 2.5 mm²
Protection Class IP20
Dimensions (W x H x D) 68 mm × 135 mm × 30 mm
Net Weight Approx. 0.19 kg
Certifications CE, cULus Class 1 Div 2 (Hazardous Location), RoHS
Primary Functions & Key Features

Hot-Swappable Design: Field signals are wired directly to the TU715F screw terminals. This allows the main I/O module to be snapped in or removed without disturbing field wiring or interrupting adjacent rack modules.

Mechanical Keying: Features mechanical locks to ensure the correct module type is installed and firmly secured during operation.

24 V DC Application Focus: Explicitly engineered for 24 V DC analog and digital I/O channels. (Note: For spring-terminal connection requirements, the equivalent variant is the TU716F).

Mounting & Installation Considerations

DIN Rail Mounting: Placed directly onto standard DIN rails alongside the main controller or fieldbus communication interface modules.

Tightening Torque: Ensure screw terminals are torqued according to S700 system guidelines (typically 0.5–0.6 Nm) to avoid loose wire connections or thread stripping.