Products Knowledge

In industrial on-site environments, an all-in-one computer often needs to connect to PLCs, barcode scanners, and MES systems simultaneously. The stable access of these three types of equipment is crucial to ensuring real-time and accurate data transmission. A reasonable interface plan should take into account both current needs and future expansion.

I. Clarify Equipment Access Requirements

First, it is necessary to understand the mainstream interface types of the three types of equipment:

• PLC: Usually communicates via serial ports (RS-232/485) or industrial Ethernet ports.

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• Barcode Scanner: Most adopt USB interfaces, while some industrial fixed barcode scanners may use serial ports or Ethernet ports.

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• MES System: Accesses the factory network through Ethernet ports.

II. Core Principles of Interface Planning

1. Matching Quantity and Type: Configure interfaces according to the number of on-site equipment. For example, if it is necessary to connect 2 PLCs (one with a serial port and one with an Ethernet port) and 1 USB barcode scanner, at least 1 serial port, 1 Ethernet port, and 1 USB port are required. It is recommended to reserve a 20%-30% interface margin for future expansion.

2. Stability and Isolation: Serial ports used for connecting PLCs should adopt opto-electronic isolation design to prevent electrical interference. Ethernet ports should use industrial-grade chips to enhance anti-interference capabilities.

3. Reasonable Layout: Interfaces that require frequent plugging and unplugging (such as USB) should be placed in easily operable positions; fixed connection interfaces (such as serial ports and Ethernet ports) can be located at the rear of the equipment. All interfaces should have clear labeling.

4. Driver Compatibility: Ensure that the system has pre-installed or can stably support the required serial port drivers and industrial communication protocols.