Terminal Blocks - Interface Modules

Image Part Number Description / PDF Quantity Rfq
0391703037

0391703037

Woodhead - Molex

INTERFACE MOD DSUB FMALE 37POS

0

0391701126

0391701126

Woodhead - Molex

INTERFACE MOD HDR 26POS 12-26AWG

0

0391701120

0391701120

Woodhead - Molex

INTERFACE MOD HDR 20POS 12-26AWG

0

0391701134

0391701134

Woodhead - Molex

INTERFACE MOD HDR 34POS 12-26AWG

0

0391702115

0391702115

Woodhead - Molex

INTERFACE MOD DSUB MALE 15POS

0

0391703125

0391703125

Woodhead - Molex

INTERFACE MOD DSUB FMALE 25POS

0

0391701150

0391701150

Woodhead - Molex

INTERFACE MOD HDR 50POS 12-26AWG

0

0391703115

0391703115

Woodhead - Molex

INTERFACE MOD DSUB FMALE 15POS

0

0391703050

0391703050

Woodhead - Molex

INTERFACE MOD DSUB FMALE 50POS

0

0391701016

0391701016

Woodhead - Molex

INTERFACE MOD HDR 16POS 12-26AWG

0

0391702125

0391702125

Woodhead - Molex

INTERFACE MOD DSUB MALE 25POS

0

0391702150

0391702150

Woodhead - Molex

INTERFACE MOD DSUB MALE 50POS

0

0391701026

0391701026

Woodhead - Molex

INTERFACE MOD HDR 26POS 12-26AWG

0

0391703137

0391703137

Woodhead - Molex

INTERFACE MOD DSUB FMALE 37POS

0

Terminal Blocks - Interface Modules

1. Overview

Terminal Blocks and Interface Modules are essential components in electrical and electronic systems, providing secure connections between wires and devices. Terminal Blocks are modular housing units that protect and organize electrical connections, while Interface Modules act as intermediaries between different system components, converting signals or power. These components are critical in industrial automation, energy distribution, and control systems, ensuring reliability, scalability, and maintenance efficiency.

2. Major Types and Functional Classification

TypeFunctional CharacteristicsApplication Examples
Screw Terminal BlocksUse screws for wire clamping; high current capacityIndustrial control panels, HVAC systems
Spring Clamp Terminal BlocksTool-free wire insertion; vibration-resistantAutomotive electronics, robotics
PCB Terminal BlocksDirect PCB mounting; compact designConsumer electronics, instrumentation
DIN Rail Interface ModulesStandardized rail mounting; modular expansionFactory automation, process control
Signal Conversion ModulesConvert analog/digital signals; galvanic isolationPLC systems, IoT devices

3. Structure and Components

Typical terminal blocks consist of: - Conductive Elements: Brass/copper alloys with gold/silver plating for low resistance - Insulation Housing: Thermoplastic (PA66, PBT) with UL94 V-0 flammability rating - Clamping Mechanism: Screw/spring systems with mechanical stops - Marking Systems: Laser-etched labels for wire identification Interface modules add integrated circuits, optical isolators, or signal conditioning components.

4. Key Technical Specifications

ParameterTypical RangeImportance
Voltage Rating50-1000V AC/DCDetermines insulation requirements
Current Capacity1-250ADictates conductor size selection
Temperature Range-40 C to +120 CEnvironmental durability indicator
Contact Resistance<10m Impacts power efficiency
IP RatingIP20-IP68Defines protection against dust/water

5. Application Fields

  • Industrial Automation: PLC cabinets, motor control centers
  • Energy Systems: Solar inverters, wind turbine junction boxes
  • Transportation: Rail vehicle control systems, EV charging stations
  • Building Technology: Smart HVAC systems, lighting controls
  • Process Industry: Petrochemical plant instrumentation

6. Leading Manufacturers and Products

ManufacturerRepresentative ProductKey Features
Phoenix ContactPT 10-2,5/2-H-SCSpring clamp, 24A/400V, push-in wiring
TE ConnectivityMiniQ88High-density PCB terminals, 8.8mm pitch
Weidm llerOMNIMATE PCB Terminal BlocksMulti-level stacking, automated test systems
WAGO753-613 Interface RelayPlug-in module, 10A switching capacity

7. Selection Recommendations

Key considerations: - Environmental factors (temperature, vibration, chemical exposure) - Electrical parameters (voltage/current harmonics) - Installation constraints (space limitations, DIN rail compatibility) - Maintenance requirements (tool-free vs. screw-based solutions) - Future expandability (modular vs. fixed designs)

8. Industry Trends

Emerging trends include: - Miniaturization for space-constrained applications - Integrated diagnostics (IoT-enabled terminals) - Increased use of surface-mount technology (SMT) - Development of eco-friendly materials (halogen-free polymers) - Standardization of modular interface systems (e.g., IEC 61557-12) - Enhanced cybersecurity features in industrial communication modules

Application Case: In a smart factory automation system, Phoenix Contact's modular terminal blocks with built-in signal conditioning reduced wiring time by 40% while enabling real-time monitoring through integrated IoT interfaces.

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