Configured for communication line termination and bus signal impedance matching in S800 I/O systems, the ABB TX560 3BSE005881R1 (TX560 3BSE005881R1 Terminator Box) provides direct physical/electrical execution. This passive hardware unit terminates the physical end of the ModuleBus extension segment, preventing high-frequency electrical signal reflections and maintaining deterministic data transmission across distributed controller communication lines.

Technical Identifier Matrix

Hardware Specifications

DCS Backplane Bus Velocity and Network Determinism

The TX560 3BSE005881R1 provides precise transmission line impedance matching at the physical boundary of the ModuleBus extension network. By absorbing traveling voltage waves at the line end, the terminator box eliminates signal reflections and standing waves that degrade high-velocity backplane data packets. This termination maintains low noise margins and signal integrity across high-density I/O clusters linked to AC 800M or S800 Fieldbus Communication Interfaces (FCI).

Package Contents & Ordering Information

• 1x ABB TX560 3BSE005881R1 Terminator Box
• 1x Installation Instruction Sheet

Field Installation Guidelines

• Mounting Configuration: Connect the TX560 directly to the designated ModuleBus extension interface or terminal mounting unit at the physical end of the S800 I/O cluster.
• Bus Termination Rule: Ensure exactly one termination box is installed at the final physical node of the optical or electrical ModuleBus line segment.
• Cable Strain Relief: Secure incoming ModuleBus extension cables with appropriate mounting clips to prevent mechanical strain on internal connector pins.
• Shielding & Grounding: Connect cable shield braids to the local frame ground (FG) earth bar via 360-deg grounding clamps. Maintain earth path resistance below 100 ohms.

Frequently Asked Questions

• What is the main function of the TX560 3BSE005881R1 Terminator Box?

  The module provides impedance matching at the end of an S800 ModuleBus line to eliminate signal reflections and preserve communications.

• Where should the TX560 terminator box be placed in an S800 I/O cluster?

  The TX560 must be installed at the last physical station or position on the ModuleBus extension segment.

• Does the TX560 3BSE005881R1 require an active 24 VDC power supply?

  No, the TX560 is a passive hardware component and consumes 0 W of electrical power.

• What happens if the ModuleBus segment is operated without the TX560 terminator?

  Unterminated bus lines cause voltage wave reflections, leading to communication timing errors, frame corruption, and I/O bus faults.

• What operating temperature limits are specified for the TX560?

  The terminator box is rated for operating field environments ranging from -25 deg C to +70 deg C.

• Can the TX560 be installed or removed under live system power?

  While passive, removing the terminator during operation breaks bus impedance, causing communication drops across active I/O modules.

• What cable shielding procedures apply to the ModuleBus extension lines?

  ModuleBus cables require continuous braid shielding attached to the panel earth bar with a 360-deg clamp under 100 ohms resistance.

• Is the TX560 compatible with all ABB S800 I/O ModuleBus extensions?

  Yes, the TX560 is designed specifically for terminating standard S800 I/O electrical ModuleBus extension line architectures.