Phoenix CBB & CB TM1 Series: Device Circuit Breaker System - Comprehensive Application & Selection Guide

Core Positioning

The Phoenix CBB & CB TM1 Series represents an innovative modular device circuit breaker system that combines centralized power distribution with individual circuit protection in industrial automation environments. This integrated solution provides a complete "power-to-load" protection chain, where the CBB (Device Circuit Breaker Board) serves as the distribution backbone while CB TM1 (Thermal-Magnetic Circuit Breakers) offer precise overload and short-circuit protection for individual loads. Designed for global industrial standards, this system delivers reliable protection for control cabinets, machinery, and equipment in manufacturing, process industries, and infrastructure projects.

Product Family Overview

1. CBB Series: Device Circuit Breaker Boards

The CBB series acts as the central distribution hub, providing:

• Power distribution for up to 12 CB TM1 circuit breakers
• Group remote signaling capability
• Centralized power supply
• Potential distribution for up to 5 loads per channel
• Space-saving DIN rail mounting (35mm NS 35/7.5)

2. CB TM1 Series: Thermal-Magnetic Circuit Breakers

The CB TM1 series are individual protection modules that plug into the CBB board, offering:

• Thermal-magnetic tripping mechanism (combines thermal overload + magnetic short-circuit protection)
• Multiple trip characteristics (SFB, M1, F1) for different load types
• Plug-in design for easy installation and maintenance
• Status indication via auxiliary contacts
• Compact 12.3mm width for space-efficient installation

Model Nomenclature Decoding

Technical Specifications

CBB 12 2X6RC-PT (2905241) Specifications

CB TM1 Series Universal Specifications

Applications

1. Industrial Control Cabinets

• Typical Setup: CBB 12 2X6RC-PT + multiple CB TM1 breakers (10A/16A SFB)
• Application: Power distribution to PLCs, HMIs, and auxiliary equipment
• Benefit: Centralized protection with individual circuit monitoring, reducing downtime

2. Machine Tool Industry

• Typical Setup: CBB board + CB TM1 16A F1 breakers
• Application: Protecting spindle motors, coolant pumps, and servo drives
• Benefit: Fast response to short circuits in sensitive machinery, preventing damage

3. Process Automation

• Typical Setup: CBB board + mixed CB TM1 breakers (0.5A-16A)
• Application: Powering sensors, actuators, and control valves in chemical/petrochemical plants
• Benefit: Group remote signaling for fault detection in hazardous environments

4. Packaging Machinery

• Typical Setup: CBB board + CB TM1 12A M1 breakers
• Application: Protecting conveyor motors, labeling systems, and pneumatic controls
• Benefit: Slow-blow characteristics handle inductive loads common in packaging equipment

Selection Guide

Step 1: Determine CBB Board Requirements

• Number of Channels: Choose 12-channel for most industrial applications
• Connection Type:
  • PT (Push-in): For quick installation, no tools required, ideal for maintenance-intensive environments
  • SC (Screw): For vibration-prone applications requiring secure connections

Step 2: Select CB TM1 Circuit Breakers

1. Current Rating Selection:

   • 0.5A: For sensors, indicators, and low-power devices
   • 10A/12A: For standard industrial motors and equipment Phoenix Contact USA
   • 16A: For heavy-duty applications like large motors or multiple load groups

2. Trip Characteristic Selection:

   • SFB (Slow-Blow): Best for inductive loads (motors, transformers) that have high inrush currents
   • M1 (Medium-Blow): General-purpose use for resistive and mixed loads
   • F1 (Fast-Blow): Ideal for electronic equipment and sensitive devices that require quick protection

3. Connection Type:

   • Always choose "-P" (plug-in) for use with CBB boards
   • Other connection types are available for direct mounting applications

Step 3: System Configuration

• For optimal performance, ensure total load current does not exceed 60A (main circuit) or 12A per channel
• Leave 1-2 spare channels for future expansion
• Consider using CB TM1 breakers with F1 characteristic for critical control circuits

Installation & Operation Notes

CBB Board Installation

1. Mount on 35mm DIN rail using the integrated clips
2. Connect power supply to the main terminals (X21)
3. Strip conductors to 10mm for push-in connections
4. For wire management, use the integrated cable routing channels

CB TM1 Breaker Installation

1. Align the breaker with the CBB board slot
2. Push firmly until it clicks into place (no tools needed)
3. Connect load wires to the breaker terminals
4. For status monitoring, connect auxiliary contacts to the monitoring system

Operation & Maintenance

• Normal Operation: Green indicator (if equipped) shows power is connected
• Fault Condition: Circuit breaker trips and pops out; auxiliary contact changes state
• Reset Procedure: After resolving fault, push the breaker back into place
• Maintenance Interval: Inspect connections every 6 months or after 1000 operating cycles
• Breaker Replacement: Simply pull out the faulty breaker and insert a new one

CBB & CB TM1 vs. Traditional Solutions

Summary & Next Steps

The Phoenix CBB & CB TM1 Series provides a comprehensive, modular solution for industrial power distribution and circuit protection. By combining the centralized power distribution of the CBB board with the individual protection of CB TM1 breakers, this system delivers reliability, flexibility, and ease of maintenance for modern automation environments.

For specific application requirements or to design a customized solution, contact your local Phoenix Contact representative or refer to the product datasheets. For critical applications, consider adding surge protection modules or monitoring systems to enhance the reliability of your power distribution network.