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B&R X20TB12

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B&R X20TB12
May 27, 2026

B&R X20TB12

The B&R X20TB12 is a 12‑pin safety‑keyed terminal block for X20 24 VDC I/O modules, designed for fast, tool‑free field wiring in industrial control and safety systemsB& R Industrial Automation. It features push‑in spring technology with lever release, supporting reliable connection of single, fine‑stranded, and sleeve‑equipped wires. Built for high shock and vibration resistance, it provides consistent low‑resistance contacts and integrated test access for easy commissioning and maintenanceB& R Industrial Automation. As a keyed safety variant, it ensures mechanical compatibility only with matched X20 safety modules (e.g., X20SO4110), preventing mismounting and supporting SIL 3/PL e safety integrity levels.

Description

B&R X20TB12

Product Introduction

The B&R X20TB12 is a 12‑pin safety‑keyed terminal block for X20 24 VDC I/O modules, designed for fast, tool‑free field wiring in industrial control and safety systemsB& R Industrial Automation. It features push‑in spring technology with lever release, supporting reliable connection of single, fine‑stranded, and sleeve‑equipped wires. Built for high shock and vibration resistance, it provides consistent low‑resistance contacts and integrated test access for easy commissioning and maintenanceB& R Industrial Automation. As a keyed safety variant, it ensures mechanical compatibility only with matched X20 safety modules (e.g., X20SO4110), preventing mismounting and supporting SIL 3/PL e safety integrity levels.

Basic Information

  • Model: X20TB12

  • Brand: B&R (Bernecker + Rainer, ABB Group)

  • Series: X20 System, X20 SafeIO

  • Type: 12‑pin keyed push‑in terminal block

  • Rated Voltage: 240 VAC / 48 VDC nominal; max. 300 VAC / 60 VDCB& R Industrial Automation

  • Rated Current: 10 A per contactB& R Industrial Automation

  • Connection Technology: Push‑in with lever release (tool‑free)B& R Industrial Automation

  • Wire Range: 0.08–2.50 mm² (28–14 AWG) single wire; 0.25–2.50 mm² fine‑stranded; 0.25–1.50 mm² with sleeve

  • Stripping Length: 7–9 mm

  • Dimensions: 12 mm × 100 mm × 75 mm

  • Weight: Approx. 0.12 kg

  • Mounting: DIN rail, snaps onto X20 I/O modules

  • Protection Class: IP20

  • Certifications: CE, UL, CSA, RoHS; compatible with SIL 3/PL e systems

Function and Positioning

The X20TB12 serves as the primary field wiring interface for X20 24 VDC and safety I/O modules, bridging field sensors, actuators, and the X20 controller system. Its keyed design enforces correct module pairing, critical for safety‑related circuits, while push‑in technology reduces wiring time by up to 70% compared to screw terminalsB& R Industrial Automation. Integrated lever release enables quick disconnection for troubleshooting, and individual terminal labeling supports clear circuit identificationB& R Industrial Automation. Positioned as a high‑reliability connection solution, it maintains signal integrity in harsh environments and supports hot‑swapping of modules without rewiring, enhancing system availability and maintainability.

Core Performance Parameters

  • Contact Resistance: ≤5 mΩB& R Industrial Automation

  • Insulation Voltage: 500 V (channel‑to‑bus)

  • Operating Temperature: −25 °C to +60 °C (horizontal mounting); −25 °C to +50 °C (vertical)

  • Storage Temperature: −40 °C to +85 °C

  • Humidity: 5–95% non‑condensing

  • Vibration Resistance: 5 g (10–500 Hz)

  • Durability: ≥500 insertion/removal cycles

  • Safety Compatibility: SIL 3 (IEC 61508), PL e / Cat. 4 (EN ISO 13849‑1) when used with matched safety modules

General Compatible Accessories

  • X20 series 24 VDC I/O modules (e.g., X20SO4110, X20DI4371)

  • X20BM33 safety‑keyed bus module

  • DIN rail mounting hardware (35 mm standard)

  • Labeling strips and markers for terminal identification

  • Test probes for 2 mm test access ports

  • Redundant 24 VDC power supply units

  • X2X Link communication cables

  • B&R Automation Studio configuration software

Applicable Equipment Fields

  • Machine Safety: Emergency stop circuits, safety door interlocks, and light curtain interfaces

  • Process Automation: Chemical, pharmaceutical, and food & beverage safety I/O wiring

  • Automotive: Assembly line safety controls, robot cell safeguarding, and press systems

  • Packaging Machinery: Safe actuator and sensor connections in high‑speed lines

  • Material Handling: Crane, hoist, and conveyor safety circuits

  • Energy: Power plant auxiliary safety, wind turbine control systems

  • General Industrial: High‑vibration environments, panel building, and system retrofitting


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