Technical Specifications:

• Number of Terminals: 5
• Terminal Type: Protective Earth (PE) / Grounding
• Rated Current per Terminal: 16 A
• Rated Voltage: 250 V AC / DC
• Wire Cross Section: 0.5 mm² to 4 mm² (solid or stranded with ferrule)
• Screw Torque: 0.8 Nm (recommended)
• Wire Stripping Length: 10 mm
• Isolation Voltage: 500 V DC (between terminals)
• Color Coding: Green-yellow (per IEC 60446 / EN 60204)
• Pollution Degree: 2 (per IEC 60664)
• Operating Temperature: 0°C to +55°C
• Storage Temperature: -25°C to +70°C
• Dimensions (W x H x D): 44 mm x 90 mm x 115 mm
• Weight: Approx. 0.1 kg
• Mounting: DIN rail TS 35 (EN 60715)

Functional Features:

• 5 dedicated PE (protective earth) terminals
• Green-yellow color identification for immediate PE recognition (per safety standards)
• Screw-clamp connection with tin-plated copper contacts
• DIN rail mounting with snap-in clip
• Label strip for terminal identification
• Bridge connection capability to daisy-chain PE across multiple modules

Performance Parameters:

• Contact Resistance: < 3 mΩ (initial)
• Contact Resistance (after life test): < 5 mΩ
• Mechanical Life: > 100 operations (screw/unscrew cycles)
• Electrical Life: > 10,000 operations (at rated load)
• Vibration Resistance: 5 g (per IEC 60068-2-6)
• Shock Resistance: 15 g (per IEC 60068-2-27)

Material Composition:

• Housing: Flame-retardant PA66 (polyamide 6.6) with glass fiber reinforcement, UL 94 V-0 rated, green-yellow color
• Terminal Screws: Zinc-plated steel, corrosion-resistant
• Terminal Contacts: Tin-plated copper alloy (CuSn6)
• Label Strip: Polycarbonate (PC), green-yellow tinted
• DIN Rail Clip: Spring steel, tin-plated

Structural Features:

• Standard X20 module width: 44 mm
• Front-facing X20 bus connector
• 5 screw terminals on the front face, green-yellow housing
• Full-width label strip (green-yellow)
• Snap-in DIN rail mounting with locking clip

Working Principle:
The X20TB5E provides a dedicated low-impedance path to protective earth for the entire X20 system. All field devices and I/O modules are connected to this terminal block, and the PE conductor is routed to the main protective earth bar of the machine or cabinet. The screw-clamp terminals ensure a reliable, low-resistance connection (≤3 mΩ) that meets IEC 61131-2 and EN 60204-1 requirements for protective earthing. The green-yellow color coding ensures that this terminal is never mistakenly used for signal wiring.

Advantages & Highlights:

• Dedicated PE connection — eliminates risk of accidental signal/earth mixing
• Green-yellow color coding — compliant with IEC 60446, immediately recognizable
• 5 terminals allow daisy-chaining of PE across multiple X20 modules
• 16 A rating handles fault current safely
• Low contact resistance (<3 mΩ) ensures effective fault clearing
• Zero active components — maintenance-free

Applicable Industries:

• All industries using B&R X20 systems (mandatory for CE/UL compliance)
• Machine building
• Packaging machinery
• CNC machines
• Printing presses
• Any application requiring IEC 60204-1 compliance

Installation Requirements:

• Mount on DIN rail TS 35 (EN 60715) — typically placed at one end of the X20 rack
• Connect to X20 bus via rear bus connector
• Connect the main PE conductor (green-yellow, min. 2.5 mm² for X20 systems) to one of the 5 terminals
• Daisy-chain PE to other X20TB5E modules or directly to I/O module PE terminals
• Use wire ferrules for stranded conductors
• Strip wire to 10 mm, torque screws to 0.8 Nm

Usage Precautions:

• Use ONLY for protective earth (PE) connections — never for signal or power wiring
• Do not connect neutral (N) to PE at this terminal (N-PE bond must be at main supply only)
• Verify PE continuity with a multimeter after installation (resistance < 1 Ω to main earth bar)
• Do not exceed 16 A per terminal
• Always use ferrules on stranded wire
• Do not overtighten screws (max 0.8 Nm)