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PCLT-2AT4

PCLT-2AT4

PCLT-2AT4-TR

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Dual current limited overvoltage protected digital termination

Quantity $ per Unit Savings
1 - 9$3.110%
10 - 24$2.8010%
25 - 99$2.6515%
100 - 249$2.2926%
250 - 499$2.1830%
500$1.9637%
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$3.11
Parameter NameParameter Value
Input Voltage Min Volt-30.0
Input Voltage Max Volt32.0
ECCN USEAR99
ECCN EUNEC
Packing TypeTape And Reel
ROHS Compliance GradeEcopack2
GradeIndustrial
Package NameTSSOP-14

The PCLT-2A is a dual input current limiter device designed for 24 V DC automation applications.


This product is compatible with the type 2 (7.5 mA) or type 3 (3 mA) characteristic of the IEC 61131-2 standard. An internal resistance RREFallows the limiting current value to be adjusted from 3 to 7.5 mA.


Each input voltage clamping block protects the module input against electromagnetic interference such as those described in the IEC 61131-2 standard, IEC 61000-4-2 (ESD), 4-4 (transient burst), 4-5 (voltage surge) and 4-6 (conducted radio frequency interference) standards. The supply input is also designed with such a protection structure.


The low tolerance of the current limitation allows a drastic reduction in the dissipation of the input compared to a resistive input. The PCLT2 is packaged in TSSOP14 - a very low RTHexposed pad package that allows the PCB cooling pad to be reduced.


The output block of each termination channel transfers the input logic state to a logic output and a light emitting diode (LED).

Key features
  • 2 channel topology: low side input with common ground
  • Wide range input DC voltage:
    • VI= - 0.3 to 30 V with RI= 0 Ω
    • VI= - 30 to 35 V with RI= 750 Ω
  • Current limiter:
    • 3 to 7.5 mA programmable reference
    • ILIM= 6.1 mA to 8.8 mA with RREF= 10 kΩ
    • ILIM= 2.8 mA to 4.3 mA with RREF= 22 kΩ
    • Narrow limiter spread: < 17%
    • Temperature compensated operation
  • Output drive:
    • No output activation below 2 mA input
    • 1.5 mA minimum output activating current in opto-coupler mode
    • Programmable CMOS output mode option (VMOD> 2.9 V)
  • LED drive for sensor status: 4.4 mA typical with RREF= 10 kΩ
  • Input protection (RI= 750 Ω CIN= 22 nF)
  • IEC 61000-4-2 ESD, Level 4
    • In contact, ± 8 kV; in air, ± 15 kV
    • Criteria B: temporary disruption
  • IEC 61000-4-5 voltage surge, Level 3
    • ± 500 V with 42 Ω series resistor in differential mode
    • Criteria B: temporary disruption
  • IEC 61000-4-4 transient burst immunity
    • ± 4 kV peak voltage; 5 kHz repetitive rate
    • Criteria A: fully functional
  • IEC 61000-4-6 conducted RFI
    • 10 VRMS
    • Criteria A: fully functional
  • Input protection against -30 V reverse polarity
  • Ambient temperature: -25 to 85 °C
  • Benefits
    • Enable input to meet type1, 2 and 3 characteristics of IEC 61131-2 standard
    • Compatible operation with 2 and 3 wires proximity sensor according EN60947-5-2 standard
    • Flexible configuration driving either opto- coupler, or CMOS bus controller input, or 12 V AS-Interface network
    • Reduced overall dissipation
    • Enhanced functional reliability
    • Compact with high integration
    • Surface mount package fo