Technical Specifications:

• Number of Terminals: 52
• Rated Current per Terminal: 16 A
• Rated Voltage: 250 V AC / DC
• Wire Cross Section: 0.5 mm² to 2.5 mm² (solid), 0.5 mm² to 4 mm² (stranded with ferrule)
• Screw Torque: 0.8 Nm (recommended)
• Wire Stripping Length: 10 mm
• Isolation Voltage: 500 V DC (between terminals)
• 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. 0.18 kg
• Mounting: DIN rail TS 35 (EN 60715)

Functional Features:

• 52 individual screw-clamp terminals — the maximum density in the X20 TB series
• Three rows of terminals for organized signal grouping
• Clear terminal numbering (1–52) on label strip
• Color-coded terminal marks (white label, black numbering)
• DIN rail clip with snap-in locking mechanism
• Bridge connection capability for common power and ground distribution
• Tool-free wiring with standard 1.5 mm screwdriver

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
• Terminal Screws: Zinc-plated steel, corrosion-resistant
• Terminal Contacts: Tin-plated copper alloy (CuSn6)
• Label Strip: Polycarbonate (PC), UV-resistant, printable
• DIN Rail Clip: Spring steel, tin-plated

Structural Features:

• Standard X20 module width: 44 mm (fits all X20 slots)
• Front-facing X20 bus connector
• Three rows of screw terminals on the front face (optimized for high-density wiring)
• Full-width label strip for comprehensive terminal identification
• Snap-in DIN rail mounting with positive locking

Working Principle:
The X20TB52 is a completely passive wiring terminal module. It provides 52 mechanical connection points between field wires and the X20 system bus. Each terminal accepts a field wire via a screw-clamp mechanism that creates a gas-tight, vibration-resistant connection. The electrical signals pass from the field device through the terminal to the corresponding X20 I/O module via the bus connector. There are no active components — the module is purely an electromechanical interface.

Advantages & Highlights:

• Maximum density (52 points) in a single 44 mm module — saves DIN rail space
• 16 A per terminal supports both signal and low-power field device connections
• Three-row layout allows logical grouping (power, inputs, outputs)
• Bridge wiring reduces cable count for common signals
• Zero failure rate — no active electronics
• UL 94 V-0 flame-retardant housing for safety

Applicable Industries:

• Large-scale automation systems with many I/O points
• Bottling and packaging lines
• Automotive body shops
• Steel and metal processing
• Large conveyor systems
• Warehouse automation

Installation Requirements:

• Mount on DIN rail TS 35 (EN 60715)
• Connect to X20 bus via rear bus connector
• Use wire ferrules on all stranded conductors (mandatory)
• Strip wire to exactly 10 mm
• Torque all screws to 0.8 Nm
• Group wires by function (e.g., row 1: 24 V, row 2: inputs, row 3: outputs)
• Use bridge connections for common 24 V and 0 V distribution

Usage Precautions:

• Do not exceed 16 A per terminal at any time
• Do not mix solid and stranded wire on the same terminal
• Always use ferrules for stranded wire
• Do not overtighten screws (max 0.8 Nm)
• Label every wire before connection
• Do not operate above +55°C ambient temperature
• Verify all connections with a multimeter before powering the system