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The IDC5B can act as either a DC or AC input, accepting 4-16 VDC or VAC. Input modules are used for sensing ON/OFF voltage levels. This module is a fast-switching input module for signals produced by photoelectric switches or TTL level devices. Each module provides up to 4000 volts (transient) of optical isolation between the field inputs and the output side of the circuit. Typical uses and applications include sensing the presence or absence of voltage or sensing contact closures from sources such as: proximity switches, limit switches, selector switches, push buttons, photoelectric switches, ttl-compatible devices. Operating ambient temperature: - 30 to 70 degree C. Isolation, input-to-output (transient): 4000 V. Output voltage drop: logic side: 0.4 volts at 50 mA. Output current: 50 mA. Output leakage with no input IDC5D only: 0.1 mA at 30 VDC. Transistor: 30 volts breakdown.Underwriters Laboratory, Canadian Standards Association, IEC 950: 1991-09, 89/336/EEC, 2002/95/EC