Description

Schneider LADT2: Time Delay Auxiliary Block

Introduction

The Schneider LADT2 is a time delay auxiliary block designed to add delayed switching functionality to contactors within Schneider Electric’s TeSys range. With this device, users can configure timed delays for opening or closing auxiliary contacts, which is useful for controlling sequences in automation and motor control applications. The LADT2 is valued for its precision, durability, and compatibility with a wide variety of contactors, making it a go-to component for applications that require controlled timing and sequential operations.

Key Features of Schneider LADT2

  • Time Delay Functionality: The LADT2 enables users to set a time delay for switching auxiliary contacts, supporting both “On-Delay” (time before the contact closes) and “Off-Delay” (time before the contact opens) operations.
  • Adjustable Time Range: It offers an adjustable time range, typically from 0.1 to 30 seconds, allowing for fine-tuned control over timing in automation sequences.
  • Compatibility with TeSys Range: The LADT2 is compatible with TeSys D and K contactors, making it easy to integrate into existing Schneider Electric systems.
  • Easy Clip-On Installation: Designed for easy mounting, the LADT2 attaches directly to the contactor, requiring no extra tools or components.
  • Durable Build: Constructed to withstand industrial conditions, the LADT2 performs reliably in environments that require precise timing control under demanding conditions.

Applications of Schneider LADT2

  1. Motor Control Systems: The LADT2 is commonly used in motor control applications where delayed startup or shutdown is needed, reducing the risk of power surges or system damage.
  2. Conveyor Systems: In automated conveyor systems, time delay relays like the LADT2 help in controlling the sequence of belt movements, ensuring materials are transported smoothly without overlap.
  3. HVAC Systems: The LADT2 can be used to control timed sequences in HVAC systems, providing staggered starts to reduce load on the power system.
  4. Industrial Automation: The LADT2 enables sequential control, essential in processes where one operation must complete before another begins.
  5. Pumping and Water Treatment Plants: Delayed switching is beneficial in controlling pumps and valves, ensuring smooth transitions and protecting equipment from sudden pressure changes.

Benefits of Schneider LADT2

  • Improved Process Control: By adding timed delays, the LADT2 allows for precise control of sequences, enhancing efficiency and safety in automated systems.
  • Easy to Install and Configure: With a clip-on design and adjustable time settings, the LADT2 is user-friendly and quick to set up, reducing installation time.
  • Increased Protection for Equipment: Time delays help to prevent power surges and excessive wear on equipment, increasing the lifespan of motors and other components.
  • Enhanced Safety: Delayed control can prevent accidental starts and stops, ensuring safer operation in industrial environments.
  • Space-Saving Design: The compact form factor makes the LADT2 suitable for use in control panels with limited space, providing enhanced functionality without requiring additional panel area.

Additional information

brands

Schneider Electric

Specifications

Main
Range TeSys TeSys Deca
Product name TeSys Deca
Product or component type Time delay auxiliary contact block
Range compatibility TeSys Deca CAD TeSys Deca LC1D TeSys F LC1F TeSys F CR1F
Mounting location Front
Pole contact composition 1 NO + 1 NC
Contacts operation Time delay
Timer type On delay
Time delay range 1...30 s
[Ue] rated operational voltage 690 V AC 25...400 Hz
[Ie] rated operational current 6 A at 120 V AC-15 1.04 A at 690 V AC-15 0.55 A at 125 V DC-13 0.1 A at 600 V DC-13
[Ui] rated insulation voltage 690 V conforming to IEC 60947-5-1 600 V conforming to UL 60947-5-1 600 V conforming to CSA C22.2 No 60947-5-1
[Ith] conventional free air thermal current 10 A (at 60 °C)
Standards EN/IEC 60947-5-1 UL 60947-5-1 CSA C22.2 No 60947-5-1 GB/T 14048.5 EN 50012 IEC 60335-1:Clause 30.2 IEC 60335-2-40:Annex JJ UL 60335-2-40:Annex JJ
Product certifications IECEE CB Scheme UL CSA CCC EAC UKCA
Complementary
Irms rated making capacity 140 A at <= 690 V AC conforming to IEC 60947-5-1 250 A at <= 690 V DC conforming to IEC 60947-5-1
Permissible short-time rating 100 A 60 °C 1 s 120 A 60 °C 500 ms 140 A 60 °C 100 ms
Protection type GG fuse 10 A
Mechanical durability 5 Mcycles
Minimum switching current 5 mA
Minimum switching voltage 17 V
Non-overlap time 1.5 ms on de-energisation no overlap between NC and NO contact 1.5 ms on energisation no overlap between NC and NO contact
Insulation resistance > 10 MOhm
Connections - terminals Screw clamp terminals 1 cable(s) 1…2.5 mm²flexible with cable end Screw clamp terminals 1 cable(s) 1…2.5 mm²flexible without cable end Screw clamp terminals 2 cable(s) 1…2.5 mm²flexible with cable end Screw clamp terminals 2 cable(s) 1…2.5 mm²flexible without cable end Screw clamp terminals 1 cable(s) 1…2.5 mm²rigid Screw clamp terminals 2 cable(s) 1…2.5 mm²rigid Screw clamp terminals
Tightening torque 1.7 N.m - with screwdriver flat Ø 6 mm 1.7 N.m - with screwdriver Philips No 2 1.7 N.m - with screwdriver pozidriv No 2
Height 48 mm
Width 44 mm
Depth 61 mm
Colour Dark grey
Environment
Environmental characteristic Normal environment
IP degree of protection IP20 conforming to IEC 60529
Protective treatment TH conforming to IEC 60068
Ambient air temperature for storage -60…80 °C
Ambient air temperature for operation -40…70 °C
Operating altitude 3000 m
Packing Units
Unit Type of Package 1 PCE
Number of Units in Package 1 1
Package 1 Height 5.2 cm
Package 1 Width 6.5 cm
Package 1 Length 5 cm
Package 1 Weight 74 g
Unit Type of Package 2 BB1
Number of Units in Package 2 10
Package 2 Height 5.2 cm
Package 2 Width 13 cm
Package 2 Length 24 cm
Package 2 Weight 752 g
Unit Type of Package 3 S03
Number of Units in Package 3 140
Package 3 Height 30 cm
Package 3 Width 30 cm
Package 3 Length 40 cm
Package 3 Weight 11 kg
Contractual warranty
Warranty 18

Main Document

Main Document

Data Sheet : Download

Main Document

Data Sheet : Download

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