SIEMENS 6ES7321-1BH02-0AA0 Input Module

Description

SIEMENS 6ES7321-1BH02-0AA0 Input Module

Product Dimensions：

## Product Overview

The SIEMENS 6ES7321-1BH02-0AA0 is a SIMATIC S7-300 SM 321 digital input module. It serves as the interface between the controller (PLC) and the process sensors. It converts external binary signals from the process level into the internal signal level of the PLC.

## Technical Specifications

## Key Product Advantages

• High Reliability: Built to industrial standards, ensuring long-term stability in harsh electromagnetic environments.

• Compact Design: The 40mm width allows for high-density configurations in the control cabinet, saving valuable rail space.

• Galvanic Isolation: Protects the internal PLC electronics from external voltage spikes or surges from the field devices.

• Ease of Maintenance: Features front-facing status LEDs for each channel, making it simple to troubleshoot wiring or sensor issues at a glance.

• Compatibility: Seamlessly integrates with the entire S7-300 ecosystem and can be used in ET 200M distributed I/O stations.

## Important Precautions & Notes

• Front Connector: This module requires a 20-pin front connector (e.g., 6ES7392-1AJ00-0AA0) which must be ordered separately.

• Wiring Safety: Ensure the 24V DC power supply is switched off before plugging or unplugging the module to prevent damage to the backplane bus.

• Polarity: Observe correct polarity for the input signals and the common ground to ensure signal registration.

• Environment: Ensure the ambient temperature remains within the specified range (usually 0°C to 60°C for horizontal mounting) to prevent overheating.

## Common Applications

This module is a “workhorse” in industrial automation and is typically used for:

1. Discrete Manufacturing: Sensing positions from limit switches, proximity sensors, and photoelectric eyes.

2. Process Control: Monitoring status signals from valves, motors (ON/OFF), and pressure switches.

3. Operator Panels: Reading signals from physical pushbuttons and selector switches.

4. Retrofitting: Widely used in maintaining or expanding existing S7-300 installations in various industries like automotive, food & beverage, and water treatment.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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