ABB TB870F 3BDM000160R1 Terminal Resistance

The ABB TB870F 3BDM000160R1 is a high-quality terminal resistance module used in industrial control and communication systems, particularly in ABB’s Freelance DCS (Distributed Control System). This resistor module is designed to serve as a termination resistor for PROFIBUS-DP or RS-485 communication buses, ensuring signal integrity and stable data transmission.

In fieldbus and serial communication networks, termination resistors are essential for eliminating signal reflections and maintaining the correct impedance at the end of the communication line. The TB870F is engineered specifically to meet ABB’s robust standards for performance and reliability in critical industrial environments.

Key Features

• Designed for ABB PROFIBUS-DP and RS-485 systems

• Ensures signal integrity through proper bus termination

• Compact, DIN-rail mountable module

• Passive, maintenance-free component

• Industrial-grade reliability

• Direct compatibility with ABB Freelance and AC 800F systems

Technical Specifications

Industry Applications

• Factory Automation – Enables stable communication in PROFIBUS networks in manufacturing systems

• Chemical and Petrochemical Plants – Used in DCS communication lines for precise process control

• Utilities and Power Generation – Ensures noise-free communication in control rooms and substations

• Pharmaceutical Plants – Protects RS-485 integrity in batch control and MES interfaces

• Pulp & Paper Industry – Maintains stable PROFIBUS connectivity across distributed field devices

• Marine & Offshore Automation – Supports robust industrial networking in harsh environmental conditions

Advantages

• Signal Integrity Assurance: Eliminates communication errors due to signal reflection

• Plug-and-Play: Installs quickly in ABB control cabinets with DIN rail setup

• Passive Operation: Requires no power, increasing reliability and minimizing failure points

• Designed for ABB Networks: Optimized for AC 800F and Freelance DCS communication buses

• Wide Temperature Range: Suitable for both indoor and outdoor industrial environments

Frequently Asked Questions (FAQ)

1. What is the purpose of the TB870F terminal resistance?

   It serves to terminate PROFIBUS-DP or RS-485 communication lines to maintain signal quality.

2. Which ABB systems is the TB870F compatible with?

   It is designed for use in ABB Freelance and AC 800F DCS platforms.

3. Does the TB870F require a power supply?

   No, it is a passive device and does not require any external power.

4. What is the resistance value of the TB870F?

   The typical PROFIBUS termination network resistance includes 220 Ω and 390 Ω resistors.

5. Where is this device installed?

   It is installed at the physical end of a PROFIBUS-DP or RS-485 bus line, typically inside a control cabinet.

6. Can it be mounted on a DIN rail?

   Yes, the TB870F is designed for DIN rail mounting.

7. What happens if I don’t use termination resistors?

   Lack of termination can cause signal reflections, leading to data errors or communication failure.

8. Is the TB870F compatible with other manufacturers’ PROFIBUS devices?

   While optimized for ABB systems, it may be used with other PROFIBUS-DP networks adhering to RS-485 standards.

9. How heavy is the TB870F module?

   It weighs approximately 0.09kg.

10. What are the environmental ratings?

    It is built for industrial use, with an operating temperature range from –25°C to +70°C.