Excellent PLC
Product Description
ABB TB850 3BSC950193R1 is a CEX-Bus Terminator used in the AC 800M controller environment within the System 800xA automation platform. It is specifically designed to terminate the CEX-Bus on the last unit in the communication chain to ensure signal integrity and prevent reflections.
Technical Specifications
| Parameter | Description |
|---|---|
| Product Name | CEX-Bus Terminator |
| Model Number | TB850 |
| ABB Order Code | 3BSC950193R1 |
| Used With | AC 800M Processor Units |
| Bus Type | CEX-Bus (Controller Extension Bus) |
| Installation Position | Last position on CEX-Bus chain |
| Protection Class | IP20 |
| Operating Temperature | 0 to +55 °C |
| Storage Temperature | -40 to +70 °C |
| Dimensions (W x H x D) | 55 × 16 × 50 mm |
| Weight | 0.04 kg |
Applications
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Industrial automation networks using ABB AC 800M controllers
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Redundant and non-redundant system configurations in System 800xA
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Suitable for process industries such as oil & gas, power, chemicals, and manufacturing
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Ensures proper communication on the CEX-Bus by terminating the last node
Product Advantages
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Essential for System Stability: Prevents bus reflection and communication errors
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Compact Design: Easy to install in tight panel spaces
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High Compatibility: Seamless integration with all AC 800M processor units
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Reliable Operation: Operates in harsh industrial environments with high reliability
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No Configuration Needed: Simple plug-and-play design
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Supports Redundancy: Used in both single and dual CPU configurations
FAQ (Frequently Asked Questions)
Q1: What is the primary function of the TB850?
A1: It terminates the CEX-Bus to maintain signal integrity in the AC 800M controller setup.
Q2: Is TB850 mandatory in every installation?
A2: Yes, it must be installed at the end of the CEX-Bus chain for correct system operation.
Q3: Can TB850 be reused if removed?
A3: Yes, it can be reused as long as it is undamaged.
Q4: Does TB850 require power?
A4: No, it is a passive terminator and requires no external power.
Q5: Where should the TB850 be installed?
A5: On the last unit of the CEX-Bus in the communication chain.
Q6: Is the TB850 suitable for hazardous environments?
A6: It complies with general industrial standards, but check system certifications for hazardous zones.
Q7: Can I use TB850 with third-party systems?
A7: No, it is designed specifically for ABB AC 800M-based systems.
Q8: What is the enclosure rating of the TB850?
A8: It has an IP20 protection class.
Q9: What happens if TB850 is not installed?
A9: Communication on the CEX-Bus may fail due to signal reflections.
Q10: Is TB850 included in CPU packages?
A10: Yes, it is typically included in AC 800M controller kits like PM861, PM864, etc.
Related Models (Same Series or Functionality)
| Model Number | Description | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| TB807 | ModuleBus Terminator | 55×16×50 | 0.04 |
| TB852 | RCU-Link Terminator | 55×16×50 | 0.04 |
| TK850 | CEX-Bus Expansion Cable | Cable | – |
| PM861AK01 | Processor Unit with TB850 included | 119×186×135 | 1.2 |
| PM864AK01 | High-performance Processor Unit | 119×186×135 | 1.2 |
| PM866K01 | High-capacity Processor Unit | 119×186×135 | 1.2 |
Popular ABB Models (Same Brand)
| Model Number | Description | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| PM891K01 | Highest-performance CPU Module | 174×186×94 | 1.6 |
| CI854AK01 | PROFINET Interface Module | 45×170×100 | 0.15 |
| CI860A | ModuleBus Communication Interface | 45×170×100 | 0.2 |
| TU849 | Baseplate for AC 800M I/O modules | 210×130×40 | 0.4 |
| AI820 | Analog Input Module, 4 channels | 45×170×100 | 0.25 |
| DO880 | Digital Output Module, 16 channels | 45×170×100 | 0.25 |
