Description

ABB TB842 ModuleBus Optical Port

The ABB TB842 3BSE022464R1, also cataloged as the TB842 ModuleBus Optical Port, provides fiber optic communication between CI801 or CI840/CI840A FCI modules and TB820/TB820V2/TB840/TB840A ModuleBus modems within Optical ModuleBus networks.

Hardware Specifications

Parameter	Specification
Model	TB842 3BSE022464R1
Brand	ABB
Product Type	ModuleBus Optical Port
Communication Protocol	ModuleBus
Origin	Sweden
Weight	90 g
Dimensions	Width 17.6 mm, Height 56.7 mm, Depth 42.3 mm
Operating Temp	0 to +55 deg C
Storage Temp	-40 to +70 deg C
Power Consumption	0.5 W power dissipation, 20 mA typical 24 VDC consumption
ModuleBus Interface	Fiber optic interface with one transmit and one receive connection
Communication Speed	Maximum 10 Mbit/s
Optical Wavelength	650 nm
Optical Connector Type	Agilent, former Hewlett-Packard, Versatile Link
Optical Fiber Support	Plastic fiber and HCS (Hard Clad Silica) fiber
Line Redundancy	Supported
Module Redundancy	Supported
Hot Swap	Supported
Mounting Position	Vertical or horizontal
Protection Class	IP20 according to IEC 60529
Equipment Class	Class I according to IEC 60536
Humidity Range	5 to 95 %, non-condensing
CE Marking	Yes
Safety Standards	EN 61010-1, UL 61010-1, EN 61010-2-201, UL 61010-2-201
Hazardous Location Approval	cULus Hazardous Location Class 1 Zone 2, ATEX Zone 2
Marine Certifications	ABS, BV, DNV-GL, LR
RoHS Compliance	EU RoHS, UAE RoHS, CN RoHS
WEEE Compliance	DIRECTIVE/2012/19/EU

ABB Optical ModuleBus Communication Interface

The TB842 operates as an optical communication node within ABB ModuleBus architectures. It connects CI801 FCI modules through TB806 and interfaces with CI840/CI840A FCI modules through TU847 and TB806 for single I/O configurations. For redundant I/O configurations, it connects through TU846 and TB846.

The module supports both simplex and duplex optical configurations. In simplex operation, optical ModuleBus nodes form a ring structure. In duplex operation, nodes connect in a linear arrangement. Therefore, the TB842 configuration depends on the required network topology and redundancy design.

The optical transmitter and receiver support communication rates up to 10 Mbit/s. Additionally, each ModuleBus network must use identical transmitter and receiver types across all connected nodes to maintain communication compatibility.

For ABB industrial control systems, the TB842 supports backplane bus communication velocity requirements and I/O density scaling by extending optical ModuleBus connectivity between distributed I/O components and communication interface modules.

Frequently Asked Questions

Q: What optical fiber types can the ABB TB842 support?
A: The TB842 supports plastic optical fiber and HCS (Hard Clad Silica) optical fiber using Agilent, former Hewlett-Packard, Versatile Link connectors. The complete ModuleBus network must use the same transmitter and receiver type.

Q: Can the TB842 operate in redundant ModuleBus configurations?
A: Yes. The TB842 supports both line redundancy and module redundancy. It can operate in simplex optical ring configurations and duplex optical row configurations according to system architecture requirements.

Q: What is the maximum communication speed of the TB842?
A: The TB842 optical interface supports a maximum communication speed of 10 Mbit/s with a 650 nm optical wavelength.

Field Installation Guidelines

Install the TB842 on an ABB-compatible mounting assembly in either vertical or horizontal orientation according to cabinet design requirements.

Verify that the selected optical fiber type matches all connected ModuleBus nodes before commissioning. The optical transmitter and receiver types must remain consistent throughout the network.

Route fiber optic cables separately from high-voltage power wiring and strong electromagnetic interference sources. Maintain proper bending radius limits specified by the selected fiber manufacturer.

Check all Versatile Link optical connectors for correct alignment and clean optical surfaces before connection. Contamination on optical interfaces can reduce signal quality.

Confirm 24 VDC power wiring polarity before energizing the module. Use appropriate grounding practices for the cabinet and connected ABB control equipment.

Specifications

• Brand: ABB

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems