Siemens 6ES7321-1BH02-0AA0 Digital Input

Description

Siemens 6ES7321-1BH02-0AA0 is a digital input module belonging to the SIMATIC S7-300 series, designed to connect PLC systems with digital process signals. It supports connection to standard switches and two-wire proximity switches (BERO), serving as a reliable interface between control systems and field devices. The module features 16 digital input channels with input characteristics compliant with IEC 61131, Type 1, and can fully control all 16 channels at temperatures up to 40 degrees Celsius and 60 degrees Celsius, regardless of horizontal or vertical installation orientation. Its load voltage L+ has a rated value of DC 24V, with an allowable range of DC 20.4V to 28.8V. The input voltage is DC type, with a rated value of DC 24V; signal “0” corresponds to a voltage range of -30V to +5V, while signal “1” corresponds to 13V to 30V. For signal “1”, the typical input current is 7mA. As a modular device, it integrates photoelectric isolation for enhanced signal stability and anti-interference performance, making it suitable for industrial automation scenarios that require accurate digital signal collection and transmission.