Description

ABB TB807 Modulebus Terminator

The ABB 3BSE008538R1, also cataloged as the TB807 Modulebus Terminator, operates as a passive termination unit for completing Modulebus communication lines within ABB S800 I/O system configurations.

Hardware Specifications

Parameter	Specification
Model	TB807 3BSE008538R1
Brand	ABB
Product Type	Modulebus Termination Unit
Origin	Sweden
Weight	10 g
Dimensions	Width: 17 mm; Depth: 13 mm; Height: 19 mm
Operating Temp	0 to +55 deg C
Storage Temperature	-25 to +70 deg C
Power Consumption	Passive unit, no external power consumption
Mechanical Platform	S800
Protection Class	IP20 according to IEC 60529
Pollution Degree	Degree 2 according to IEC 60664-1
Electrical Safety	IEC 61131-2, UL 61010-1, UL 61010-2-201
EMC Compliance	EN 61000-6-4 and EN 61000-6-2
Corrosion Protection	ISA-S71.04: G3
RoHS Compliance	EU RoHS, UAE RoHS, CN RoHS
WEEE Compliance	Directive 2012/19/EU
Hazardous Location Certification	C1 Div 2 cULus, C1 Zone 2 cULus, ATEX Zone 2
Marine Certification	ABS, BV, DNV, LR

Modulebus Termination Function

The ABB TB807 provides physical termination for the S800 Modulebus network. The unit completes the communication bus structure by applying the required termination impedance at the end of the Modulebus segment. Therefore, it prevents signal reflections and maintains correct bus electrical characteristics.

The TB807 uses a passive design without active electronics or external power input. Additionally, its compact S800 mechanical format supports installation within ABB I/O assemblies where space requirements apply.

Frequently Asked Questions

Q: What is the primary function of the ABB TB807?
A: The TB807 functions as a passive Modulebus termination unit. It terminates the end of an S800 Modulebus segment and maintains proper bus signal conditions.

Q: Does the TB807 require a power supply connection?
A: No. The TB807 is a passive component and does not require external power or firmware configuration.

Q: Which ABB system platform uses the TB807?
A: The TB807 belongs to the ABB S800 mechanical platform and is designed for Modulebus termination applications.

Field Installation Guidelines

• Install the TB807 at the designated end position of the Modulebus communication segment according to ABB system configuration requirements.
• Verify that the termination unit is installed securely within the S800 hardware assembly.
• Maintain proper cable routing and avoid parallel installation with high-current power conductors to reduce electromagnetic interference.
• Follow ABB grounding and shielding practices for Modulebus cable installations.
• Confirm that environmental conditions remain within the specified operating temperature, humidity, and protection class limits.
• Inspect mechanical connections during commissioning to ensure correct physical placement and bus continuity.

Specifications

• Brand: ABB

Advantages

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