ControlLogix 16 Point D/I Module

Description: A digital input module from the ControlLogix series, the 1756-IH16IK has 16 independently separated input channels that are intended to process high-voltage DC signals, usually between 90 and 146 VDC. Each input is electrically separated, which prevents ground loops, enhances noise immunity, and enables flexible integration across mixed-voltage systems. The "K" suffix denotes conformal coating, which protects the internal circuitry from moisture, dust, and corrosive chemicals, making this module suitable for severe settings such as chemical plants, offshore platforms, and high-humidity industrial areas. This module supports both sink and source wiring configurations and has diagnostic features such module health indicators, input status LEDs, and communication status feedback. It connects to the ControlLogix chassis using a 36-pin removable terminal block (RTB), such as the 1756-TBCH or 1756-TBS6H, which must be ordered separately. With its strong isolation, environmental protection, and high-voltage compatibility, the 1756-IH16IK is an excellent choice for mission-critical applications in energy, manufacturing, and process control.