6ES7321-7BH01-0AB0 Siemens Simatic S7-300 Digital I/O Module

Product parameters

Number of input channels: 16 digital input points.

Input voltage: Rated value DC 24V, allowable range DC 19.2V - 28.8V.

Input current: Typical value of 7mA when signal "1" (high level), maximum of 1mA when signal "0" (low level).

High-speed function parameters

Maximum counting frequency: 100kHz in single-phase counting mode and 50kHz in dual-phase A/B orthogonal mode.

Counter type: Supports upward/downward counting, period measurement, and frequency measurement.

Isolation method: The channel and the backplane bus are isolated through a photoelectric coupler, with an isolation voltage of DC 500V.

Function

High-speed counting function: Supports 16-bit or 32-bit counters and can be connected to incremental encoders to achieve precise counting of high-speed signals such as motor speed and conveyor belt displacement.

Frequency and period measurement: It can directly measure the frequency (up to 100kHz) and period of the input signal, and is suitable for scenarios where signal fluctuations need to be monitored.

Diagnosis and status indication: The module is equipped with a power light (PWR), a fault light (SF), and status lights for each channel, which can display power, module faults, and input signal status in real time, facilitating quick troubleshooting.

Compatibility: Fully compatible with S7-300 series cpus. It can communicate directly with the CPU via the backplane bus without additional wiring and supports STEP 7 software programming configuration.

Application scenarios

Mechanical manufacturing: It is used in machine tools, packaging machines, printing machines and other equipment. By connecting encoders, it measures the spindle speed, feed rate or product conveying speed to achieve precise control.

Logistics and conveying: In conveyor belt and sorting machine systems, count the quantity of goods passing through or measure the running distance of the conveyor belt to ensure the accuracy of material positioning and sorting.

Automated production line: Monitor the operating frequency of equipment such as motors and pumps in the production line, determine whether the equipment is in a normal working state, and trigger an alarm in a timely manner when an abnormal frequency occurs.

Testing and inspection equipment: used for electronic component test benches and sensor calibration equipment, to measure the frequency or period of input signals and verify whether the performance of the equipment meets the standards.

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