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- TB852
- RCU Link Terminator
- Sweden
- 55 × 16 × 50 mm
- 0.045kg
- 3BSC950263R1
- Xiamen, China
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Product Overview: ABB TB852 (3BSC950263R1)
Brand & Series
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Brand: ABB
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Series: S800 / AC 800M / 800xA Automation Accessories
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Product Type: CEX‑Bus Terminator Module
Product Description
The TB852 (3BSC950263R1) is a high-performance terminator module designed for CEX‑Bus communication networks in industrial automation systems. Like its counterpart TB851, this module ensures signal integrity by eliminating reflections at the end of a bus line, which is critical for reliable communication between distributed controllers and I/O modules in AC 800M and 800xA distributed control systems.
The TB852 is compact, lightweight, and designed for DIN-rail mounting. It is passive, meaning it does not require an external power supply, and is engineered for reliable operation in harsh industrial environments, including high humidity and temperature variations. Its robust design makes it a maintenance-free component that guarantees long-term stability in critical industrial processes.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | TB852 |
| Part Number | 3BSC950263R1 |
| Function | CEX‑Bus Terminator |
| Bus Compatibility | CEX‑Bus |
| Voltage Requirement | Passive, no power needed |
| Bus Connector | 25‑pin DB25 female |
| Mounting Type | DIN rail / Panel mount (S800 compatible) |
| Dimensions (H×W×D) | 55 × 16 × 50 mm |
| Weight (kg) | 0.045 |
| Operating Temperature | 0–55 °C |
| Storage Temperature | −40–+70 °C |
| Humidity | 5–95 % non-condensing |
| Environmental Compliance | RoHS, CE, UL |
| Compatibility | AC 800M, 800xA systems |
Applications
The TB852 is used in industrial automation for reliable CEX‑Bus network operation:
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Termination of CEX‑Bus communication lines in AC 800M and 800xA systems
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Process automation in chemical, petrochemical, and pharmaceutical plants
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Power generation and substation monitoring networks
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Water and wastewater treatment systems
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Manufacturing production lines and material handling automation
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Mining and mineral processing automation
Proper termination ensures signal quality, prevents reflections, and guarantees error-free communication across extended control networks.
Key Advantages
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Signal Integrity: Eliminates reflections, ensuring stable and accurate data transmission.
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Compact & Lightweight: Minimal footprint and low weight (0.045 kg) for easy installation.
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Maintenance-Free: Passive design requires no external power or servicing.
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Easy Installation: Compatible with DIN rails and standard panel mounts.
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Industrial Compatibility: Fully compatible with AC 800M and 800xA distributed control systems.
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Reliable in Harsh Environments: Operates effectively under wide temperature and humidity ranges.
Recommended Related Models (Same Series / Similar Function)
| Model | Description | Basic Parameters |
|---|---|---|
| TB851 | CEX‑Bus terminator | 55×16×45 mm, Weight 0.04 kg, passive, DIN rail mount |
| TU842 | AC 800M termination unit | DIN rail, passive, similar bus interface |
| TU810V1 | Compact S800 module terminator | Small size, CEX‑Bus compatible |
| TU845 | S800 I/O termination unit | DIN rail mount, standard S800 interface |
| CI872K01 | AC 800M communication interface | Interface module for bus networks |
Popular ABB Models (Other Hot Units)
| Model | Category | Key Features |
|---|---|---|
| PM861AK01 | AC 800M CPU module | Central processor unit for AC 800M |
| PM867 | High-end processor | Redundant CPU, advanced computing |
| AI810 | Analog Input Module | 8-channel AI, S800 system |
| DP840 | Pulse Counter Module | Specialty I/O for counting applications |
| CI840A | Profibus DP Interface | Communication interface for Profibus networks |
FAQ (10 Q&A)
Q1: What is the main function of TB852?
A1: It terminates the CEX‑Bus network to prevent signal reflections and maintain stable communication.
Q2: Does TB852 require power?
A2: No, it is a passive terminator module and does not require an external power supply.
Q3: Where should TB852 be installed?
A3: At the endpoint of a CEX‑Bus line within the control system cabinet.
Q4: Which systems is it compatible with?
A4: AC 800M and 800xA distributed control systems.
Q5: Can TB852 be reused in another system?
A5: Yes, if it remains functional and is installed correctly.
Q6: What happens if a terminator is not used?
A6: Signal reflections may occur, causing communication errors or data loss.
Q7: What environmental conditions can it handle?
A7: Operating temperature 0–55 °C, storage −40–+70 °C, humidity 5–95 % non-condensing.
Q8: How is TB852 mounted?
A8: On DIN rails or panels using standard screws.
Q9: Does TB852 provide diagnostic feedback?
A9: No, it is passive; status is monitored through bus performance.
Q10: Is TB852 compliant with environmental regulations?
A10: Yes, it meets RoHS and CE standards for environmental and safety compliance.