2TLA020072R0300 ABB 20-072-03 URAX-C1 Safe Input

Why Choose the ABB 2TLA020072R0300 URAX-C1 Safe Input?

The ABB 2TLA020072R0300, type 20-072-03 / URAX-C1, is a safe input slave for AS-i bus within the ABB Safety PLC product group. It provides two safe inputs for safety devices with dual-channel contacts, enabling conventional electromechanical safety devices to be integrated into an AS-Interface safety system.

The URAX-C1 is designed for safety devices with two potential-free contacts in either NO+NO or NO+NC configurations. Typical compatible devices include emergency-stop push-buttons and safety switches such as ABB Smile and MKey products, making the module a practical interface between conventional dual-channel safety contacts and an AS-i safety network.

Designed for decentralised industrial machine-safety installations, the URAX-C1 is powered directly from the AS-i yellow cable at 30 V DC and requires less than 150 mA. Its compact yellow-and-black enclosure provides IP67 protection and operates from -25 to +65 °C, supporting installation close to safety devices on machinery and automated equipment.

Key Advantages

• Safe AS-i input slave for dual-channel safety devices.
• Provides two safe inputs for devices with potential-free contacts.
• Supports NO+NO and NO+NC contact configurations.
• Suitable for emergency-stop buttons, safety switches and other compatible dual-channel devices.
• Compatible with safety devices such as ABB Smile and MKey.
• Powered directly from the AS-i yellow cable without a separate auxiliary supply.
• IP67 enclosure protection supports decentralised machine installation.
• Safety capability up to PL e / Category 4 and SIL 3 when correctly incorporated into the safety system.

Key Features

• ABB Safety PLC product group.
• URAX-C1 model designation.
• 20-072-03 type designation.
• ABB order code 2TLA020072R0300.
• AS-i safe input slave.
• 2 safe inputs for devices with dual-channel contacts.
• Supports safety devices with NO+NO or NO+NC potential-free contacts.
• AS-i profile S-0.B.0.
• Slave address at delivery: 0.
• 30 V DC AS-i supply.
• Reaction time of 12 ms, excluding sensors and other peripheral components.
• IP67 enclosure protection.
• Compact yellow-and-black industrial housing.

Reliable Dual-Channel Safety Device Integration with AS-i

Many conventional machine-safety devices use two potential-free contacts to provide redundant switching channels. The ABB URAX-C1 provides the interface required to connect these dual-channel devices to an AS-i safety network, supporting both NO+NO and NO+NC contact arrangements and allowing devices such as emergency stops and guard switches to be incorporated into the safety-control architecture.

With its 12 ms off reaction time, direct AS-i power supply and IP67 enclosure, the URAX-C1 is well suited to decentralised machine installations. Its safety characteristics support applications up to PL e / Category 4 and SIL 3 when the complete safety function is correctly designed, configured and validated.

Typical Applications

• ABB Pluto AS-i Safety PLC installations.
• AS-Interface Safety at Work systems.
• Dual-channel emergency-stop push-buttons.
• Safety switches with potential-free contacts.
• ABB Smile emergency-stop devices.
• ABB MKey safety switches.
• Machine guard and access-point monitoring.
• Conveyor and material-handling machinery.
• Automated production and processing equipment.
• OEM machine building and functional-safety systems.