Is the connection between the switch power supply and its SCADA system only achievable through SNMP, or can it also be achieved through the Modbus protocol？

The connection between the switch-mode power supply and the SCADA system can be achieved not only through SNMP, but also through the Modbus protocol. Whether to use SNMP or Modbus depends on the communication protocols supported by the switch-mode power supply and the SCADA system respectively.

Key conclusion: The Modbus protocol can be fully utilized for the connection between switching power supplies and SCADA systems, when the switch power supply supports Modbus (usually Modbus RTU or Modbus TCP) and the SCADA system supports Modbus protocol plug-ins or gateway conversion.

SNMP is not the only option; it is merely a commonly used management protocol for network devices. Meanwhile, Modbus stands as one of the most prevalent device communication protocols in industrial settings.

Typical application scenarios

Modbus is a mainstream solution: Most industrial switching power supplies (such as smart meters, PDUs, UPS) support Modbus RTU over RS-485 by default due to its low cost, high stability, and simple deployment

SNMP is mostly used for network devices: Traditional network devices (such as routers and switches) tend to use SNMP, but unless specifically labeled, switch power supplies rarely have native SNMP support

Recommended practice

Confirm the communication interface of the switch power supply: Check the product manual to confirm whether it supports Modbus RTU/TCP or SNMP.

Check the support status of SCADA system protocols:

For open-source systems such as FreeSCADA and ScadaBR, Modbus plugins are usually built-in；

If it is a commercial SCADA system (such as Kingview or WinCC), it also generally supports Modbus.

If the protocols do not match, use a protocol conversion gateway:

For example: Modbus RTU (power supply) → VFbox gateway → SNMP (SCADA platform);

Or Modbus RTU → Modbus TCP gateway → SCADA (supporting Modbus TCP)