ABB TB846 3BSE021439R1 S800 I/O Redundant ModuleBus Inlet Module

Description

The ABB TB846 is a dual ModuleBus inlet for high-availability S800 I/O clusters, allowing redundant bus cables to connect to a single cluster. It ensures continuous communication with the AC 800M controller, keeping the cluster operational even if one cable fails, ideal for critical, fault-tolerant systems.

Specifications

• Manufacturer: ABB

• Model Designation: TB846

• Order Number: 3BSE021439R1

• Product Type: Redundant ModuleBus Inlet

• System Series: S800 I/O

• Mounting Position: Left-hand side of the I/O cluster

• Inlet Quantity: 2 (Redundant Path Support)

• Maximum Rated Voltage: 50V DC

• Connection Interface: Specialized Bus Plug for S800 MTUs

• Weight: 0.12 kg

• Operating Temperature: +5 to +55°C

Features

• Redundant Path Integration: Provides dual cable entry points to support a fail-safe communication backbone for the I/O subsystem.

• Enhanced System Integrity: Minimizes the risk of total cluster isolation by allowing automatic switching between primary and secondary bus lines.

• Passive Hardware Design: Utilizes a highly reliable passive circuit to bridge signals, eliminating potential electronic failure points within the bus inlet.

• Snap-On Installation: Designed for easy integration onto standard 35mm DIN rails, locking securely to the adjacent Module Termination Unit (MTU).

• Industrial Durability: Built with high-grade materials to withstand the thermal and vibrational stresses common in heavy industrial control cabinets.

• Mechanical Security: Engineered with specific alignment guides to ensure precise electrical contact and prevent incorrect assembly.