CLT3-4BT6(2002) Datasheet - STMicroelectronics

FUNCTIONAL DESCRIPTION
The CLTx-4 is a quadruple input digital termination device designed for 24 V DC automation applications. It achieves the front-end circuitry of a digital input module (I/O) in industrial automation, and drives an isolating opto-coupler.

FEATURES
■ 4 channels topology
■ Wide range input DC Voltage:
    ■ VI = - 0.3 to 30V with RI = 0
    ■ VI = - 30 to 35V with RI = 1.2kΩ
    ■ Low side configuration with common ground
■ Current limiter:
    ■ IGEN = 3mA
    ■ Input current limiter activation voltage < 5V
    ■ Temperature compensated operation
■ Opto-coupler drive:
    ■ No coupler activation below 1.5 mA input current
■ Input protection (RI = 1.2KΩ):
    ■ IEC61000-4-2 electrostatic discharge ESD, Class 3
        ❏ In contact, ±6kV; in air, ±8kV
        ❏ Level B: temporary disruption; no change of opto-coupler state
    ■ IEC61000-4-5 voltage surge, Class 3
        ❏ ± 1000V with 42Ω serial resistor in differential mode
            ❏ Level B: temporary disruption
    ■ IEC61000-4-4 transient burst immunity
        ❏ ± 4kV peak voltage; 5kHz repetitive rate
        ❏ Level A: fully functional
■ Operating ambient temperature: - 25 to 85°C

BenefitS
■ Reduced overall dissipation
■ Compact with high integration
■ Enables input to meet type 1 characteristic of IEC61131-2 standard
■ Compatible operation with 2 and 3 wires proximity sensor according EN60947-5-2 standard
■ Insensitive to the on state sensor impedance
■ Surface Mount Package for highly automated assembly
■ Enhanced functional reliability

APPLICATIONS
■ Industrial Automation
■ Programmable Logic Controller
■ Communication field bus nodes
■ Peripheral Input / Output modules
■ Machine tool interface