ABB TP853 AC 800M Module Termination Base
The ABB 3BSE018126R1, also cataloged as the TP853 Module Termination Unit (MTU) Baseplate, operates as a dedicated hardware component for passive field signal termination and communication module mounting within AC 800M and System 800xA control platforms. Configured to establish mechanical and electrical interconnects for communication interface cards, the baseplate terminates external communication cabling via integrated screw terminals without interrupting backplane continuity. The passive architecture routes field-level signals directly to plugged transceivers, isolating cabinet wiring from active hardware maintenance cycles.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TP853 (3BSE018126R1) |
| Brand | ABB |
| Origin | Sweden / USA |
| Weight | 0.5 kg |
| Dimensions | 45 x 63 x 162 mm |
| Operating Temp | +5 deg C to +55 deg C |
| Power Consumption | Passive (0 W) |
| Compatible Modules | CI853, CI855, CI857, CI861 |
| Protection Class | IP20 |
Backplane Bus Communication Velocity & Interface Dynamics
The TP853 maintains physical signal paths for high-speed backplane bus communication velocity across adjacent AC 800M subrack modules. Because the unit functions as a fully passive physical substrate, it contains no active silicon components, preventing module-level component breakdown from severing cabinet wiring trunks. Integrated grounding points direct electromagnetic interference (EMI) away from serial and fieldbus signals. High-density I/O scaling is achieved through its compact 45 mm profile, while hardware-level backplane pin alignment maintains firm connection during hot-swapping procedures.
Frequently Asked Questions
Q: Can an active communication module be hot-swapping removed from the TP853 while the system is powered?
A: Yes. The TP853 supports hot-swapping of compatible CI-series communication modules. Removing the interface card leaves the field wiring undisturbed on the TP853 terminal blocks, keeping adjacent subrack nodes powered and operational.
Q: Does the TP853 require an external 24 VDC power connection to operate?
A: No. The TP853 is a passive baseplate containing no active logic or power-consuming conversion circuitry. Operating power is drawn directly by the inserted communication module from the system backplane.
Q: Which communication interface modules are compatible with this termination baseplate?
A: The baseplate accommodates ABB CI853 (RS-232), CI855 (MasterBus 300), CI857 (INSUM), and CI861 (MODBUS TCP) modules.
Field Installation Guidelines
Mounting: Secure the TP853 horizontally or vertically onto a standard 35 mm DIN rail inside an IP20-rated enclosure. Slide the unit along the rail until adjacent module connectors lock together securely to complete the backplane bus chain.
Wiring and Shield Grounding: Connect external communication lines to the integrated screw terminals using recommended torque specifications. Route communication wiring through cable channels separate from high-voltage AC lines to prevent inductive noise coupling. Connect drain wires and cable shields directly to the designated grounding terminals to ensure effective EMI mitigation.
Module Insertion: Align the guide pins of the communication module with the TP853 baseplate receptacle prior to insertion. Firmly press the module into position until the mechanical locking tab engages. Verify that field terminal blocks remain strain-relieved and clear of moving parts.
Maintenance: Periodically check screw terminal tension and grounding connections during routine cabinet inspections. Ensure cabinet ambient temperatures stay between +5 deg C and +55 deg C to prevent thermal buildup around installed active modules.
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Guide
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