Schneider LA4DFB TeSys Deca - interface amplifier module - relay - 24 V DC / ...

The Schneider Electric LA4DFB is a TeSys D interface amplifier module with relay output, enabling DC logic systems to control AC-coil TeSys D contactors (LC1D09 to LC1D150). It accepts a 24 V DC input signal and switches up to 250 V AC in the contactor coil circuit. The electromechanical relay design includes built-in diode protection and an LED indicator for local status signaling.

Technical specifications:

• Commercial reference: LA4DFB
• Manufacturer: Schneider Electric
• EAN:
• Series / range: TeSys D
• Product type: Interface amplifier module (relay)
• Compatible contactors: LC1D09...LC1D150
• Number of poles: 3P
• Rated supply voltage [Us]: 24 V DC
• Control circuit voltage range: 17...30 V DC at 20°C
• Rated insulation voltage [Ui]: 250 V (IEC 60947-5-1)
• Rated control circuit voltage [Ue]: 24...250 V AC
• Current consumption: 25 mA at 20°C
• Thermal current [Ith]: 8 A at below 50°C
• Electrical endurance: 10 million cycles at 240 V
• Mounting: Top mounting
• Connection: Control circuit 1...2.5 mm² flexible or solid cable, with or without cable end
• Protection type: Built-in with diode
• IP rating: IP2x (IEC 60529)
• Operating temperature: -25...55°C
• Storage temperature: -40...80°C
• Micro-interruption resistance: 4 ms
• Height: 12 mm
• Weight: 0.05 kg
• Certifications: UL, CSA
• Standard: IEC 60255-5

Features and benefits:

• Interfaces 24 V DC control outputs directly to AC-coil TeSys D contactors with no additional components
• Built-in diode protection safeguards the control circuit from voltage spikes
• LED indicator provides instant local on/off status feedback
• 10 million cycle electrical endurance ensures long operational service life
• 4 ms micro-interruption resistance prevents nuisance dropout in electrically noisy environments

Applications:

• PLC or DC logic output interfacing with AC motor starters in industrial control panels
• Motor control centers requiring DC-to-AC voltage-level conversion for contactor coils
• Building automation and HVAC systems controlling AC contactors from DC sources

Compliant with IEC 60255-5 and IEC 60947-5-1. UL and CSA certified. Part of the Schneider Electric TeSys D range.

Also known as: Schneider LA4DFB, Schneider Electric LA4DFB, TeSys D relay interface module, contactor interface amplifier module.