6ES7321-1CH00-0AA0 Siemens Simatic S7-300 Digital I/O Module

Product parameters

Input points: 16 digital input points, divided into 2 groups (8 points in each group).

Input voltage: AC 120V (allowable range: AC 85V-146V), compatible with 120V AC control circuits.

Input current: Approximately 5mA at the rated current per point (at 120V).

Response time: Standard mode (typical value 10ms), delay mode (typical value 100ms), which can be selected through hardware dip code to balance response speed and anti-interference performance.

Isolation method: Channel group isolation (each group of 8 points is electrically isolated from the backplane bus), isolation voltage 2500V AC (1 minute), effectively isolating high-voltage signal interference.

Input type: Switches, contactor contacts, buttons, etc. suitable for connection to AC 120V control circuits (such as limit switches and operation command signals of North American industrial equipment).

Status indication: Each input point is equipped with a green LED indicator light, which lights up when the signal is connected, facilitating on-site debugging and fault detection.

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

Medium-voltage AC signal acquisition: Specifically designed for AC 120V, it can be directly connected to the control circuit of the corresponding voltage level without the need for voltage conversion components, simplifying system wiring.

High isolation protection: The 2500V AC isolation voltage can effectively block the interference of AC high voltage on the PLC system, ensuring the stable operation of the equipment. It is especially suitable for industrial sites with complex electromagnetic environments.

The response mode is adjustable: The delay mode (100ms) can filter out high-frequency noise in AC signals and is suitable for signal acquisition near strong interference equipment such as motors and transformers.

Intuitive status feedback: LED indicator lights display the on-off status of each input point in real time, quickly locating wiring errors or abnormal signal issues.

Application scenarios

North American industrial equipment: Compatible with the local 120V AC standard, it collects AC 120V control signals from machine tools and production lines (such as button and limit switch status).

Medium-voltage control circuit monitoring: In the water pump and fan systems controlled by AC 120V, collect the auxiliary contact signals of the contactor (feedback on the operating status of the equipment).

Building automation: It is used in the strong current control circuits of buildings in regions such as North America (such as the collection of switch signals for air conditioning units and lighting systems).

Energy and Infrastructure: In some distribution equipment and gas processing equipment that use 120V AC control, monitor the status signals of safety switches and valves.

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