Description
2TLJ020070R0500 ABB Pluto B20 Safety PLC
Product Dimensions:
Product Description (Detailed Explanation)
The Pluto B20 is an intelligent safety PLC that manages safety-related signals from devices such as light curtains, emergency stops, and safety sensors. Unlike traditional safety relays, the Pluto B20 is fully programmable using the Pluto Manager software, allowing for complex logic and modular system expansion.
The “All-Master” concept allows multiple Pluto units to be connected via a specialized safety bus (Pluto Safety Bus). This enables each controller to see the inputs and outputs of every other controller on the network, facilitating distributed safety control without a centralized master. The B20 model is a standard-sized unit providing a balanced mix of digital inputs and safety outputs.
Product Parameters (Technical Specifications)
| Parameter Category | Specification |
| Model Name | Pluto B20 |
| Order Code | 2TLJ020070R0500 |
| Supply Voltage | 24V DC (+15% / -15%) |
| Total I/O Count | 20 |
| Safety Inputs | 8 (Fail-safe) |
| Fail-safe Inputs/Outputs | 8 (Configurable as Input or Output) |
| Safety Relay Outputs | 2 (Volt-free contacts) |
| Safety Transistor Outputs | 2 |
| Communication Bus | Pluto Safety Bus (CAN-based) |
| Safety Category | PLe / SIL 3 / Category 4 |
| Mounting | 35mm DIN Rail |
| Protection Class | IP20 |
Product Advantages (Key Benefits)
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Programming Flexibility: Replaces multiple dedicated safety relays with a single programmable unit, reducing cabinet space and wiring complexity.
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Cost-Efficient Scalability: The “All-Master” bus system allows up to 32 Pluto units to be interconnected, sharing safety data across large machines without extra wiring.
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Simplified Troubleshooting: Provides detailed diagnostics via the software and built-in display, significantly reducing downtime during a fault.
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Dual CPU Architecture: Internal hardware uses redundant microprocessors to ensure that a single component failure will not result in a loss of safety function.
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Diverse I/O: Supports a wide variety of safety devices, including mechanical switches, non-contact sensors, and OSSD (Output Signal Switching Device) signals.
Precautions (Important Notes)
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Software Version: Ensure that the Pluto Manager software version is compatible with the hardware revision of the B20 unit to avoid programming errors.
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Bus Termination: When connecting multiple Pluto units via the safety bus, 120 $\Omega$ termination resistors must be installed at both physical ends of the CAN bus.
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Current Limits: Pay close attention to the maximum current ratings for the transistor outputs (typically 800 mA). Overloading these outputs can damage the internal circuitry.
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Safety Verification: After programming, a functional “Validation” test must be performed to confirm that the logic meets the required safety performance level (SIL/PL) for the specific machine.
Product Applications (Typical Use Cases)
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Robotic Workcells: Managing safety gates, light curtains, and emergency stops for industrial robots to prevent human-robot collisions.
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Packaging Lines: Synchronizing safety stops across long conveyor systems where multiple sections must shut down simultaneously.
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Presses and Metalworking: Providing high-speed safety monitoring for heavy machinery where Category 4 safety is mandatory.
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Automated Guided Vehicles (AGVs): Integrating laser scanners and bumpers into a compact, vibration-resistant safety controller.
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Food and Beverage: Controlling safety access points on wash-down equipment (when housed in appropriate external enclosures).
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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