6ES7321-1BH50-0AA0 Siemens Simatic S7-300 Digital Input Module

Product parameters

Input points: 16 digital input points.

Input voltage: DC 24V (allowable range: DC 19.2V-30V).

Input current: Rated current of 7mA per point (at 24V).

Response time: Two modes can be selected through hardware Settings - standard mode (typical value 6.4ms) and fast mode (typical value 0.12ms), to meet the signal acquisition requirements of different speeds.

Isolation method: Channel group isolation (every 8 points in a group, electrically isolated from the backplane bus), isolation voltage 500V AC (1 minute).

Input type: Compatible with NPN and PNP type sensors (pole-independent, flexible wiring).

Status indication: Each input point is equipped with a green LED indicator light, which lights up when the signal is connected, facilitating rapid diagnosis.

Power supply: Power is drawn through the S7-300 backplane bus, without the need for additional external power sources.

Environmental adaptability: Operating temperature 0°C-60°C, storage temperature -40 °C-70°C, protection grade IP20 (needs to be installed in a control cabinet).

Function

High-speed signal acquisition: Supports a fast response mode (0.12ms), capable of accurately capturing rapidly changing digital signals (such as limit signals of high-speed moving equipment), and responds faster than older models in the same series (such as 1BH02).

Anti-interference design: Channel group isolation technology reduces the interference of on-site electrical noise to the PLC system, protecting the safety of modules and back-end equipment.

Flexible adaptation: Compatible with both NPN and PNP sensor types, no need to distinguish polarity, simplifying on-site wiring and debugging.

Status visualization: The LED lights at each input point provide real-time feedback on the signal status, facilitating engineers to quickly troubleshoot wiring or equipment failures.

Application scenarios

High-speed production line: Collect the photoelectric sensor signals of the high-speed conveyor belt (to detect the presence or absence of workpieces) and the travel switch signals of the stamping equipment (to control the action rhythm).

Precision mechanical control: In CNC machine tools and robot workstations, monitor the on-off status of emergency stop buttons and safety light curtains to ensure the safe operation of the equipment.

Automated assembly line: Receives operation signals from buttons, knobs, or position signals from proximity switches as input conditions for PLC logic control.

Process equipment auxiliary monitoring: In coordination with liquid level switches, pressure switches, etc., collect status signals of storage tanks and pipelines (such as liquid level over-limit, abnormal pressure), and trigger alarm or control logic.

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