SR3NET01BD | Schneider Electric Modbus TCP Interface Module

Product Overview: SR3NET01BD Ethernet Interface

The SR3NET01BD is a Schneider Electric Ethernet communication interface module from the Zelio Logic series. Specifically, it extends SR3 24V DC smart relays with an RJ45 Ethernet port running at 10/100 Mbps. Because the module draws its 24V DC supply directly from the base unit, no separate power wiring is required. Consequently, engineers can add networked control without redesigning the panel supply architecture.

From a consulting standpoint, this module suits applications where local logic must report to a supervisory system. The Modbus TCP protocol provides deterministic, register-based data exchange. Therefore, the SR3NET01BD bridges compact relay logic and plant-level Ethernet networks with engineering-grade precision.

SR3NET01BD Technical Specifications

• Product type: Ethernet communication interface module
• Compatibility: SR3 24V DC smart relays
• Interface: RJ45 Ethernet 10/100 Mbps
• Protocol: Modbus TCP
• Supply voltage: 24V DC (from base unit)
• Mounting: DIN rail (side-mount on SR3)
• Operating temperature: -20 to 55 °C
• Protection rating: Not available

The 24V DC supply arrangement deserves attention. Since the module takes power from the SR3 base, input voltage tolerance follows the host relay. In addition, the side-mount DIN rail design keeps the assembly compact. The operating range of -20 to 55 °C supports most industrial cabinets. For the protection rating, refer to the official datasheet.

Integration and Network Design

Modbus TCP over RJ45 makes the SR3NET01BD a natural fit for SCADA and HMI architectures. Typical use cases include conveyor monitoring, pump control, and building automation panels. In these roles, the module publishes relay status and accepts commands over Ethernet.

Integration Note: connecting this module to a managed network may require correct cabling and, in some topologies, an external gateway or connection module. Confirm cable types and gateway requirements with the supplier before commissioning.

Installation and Reliability

Mount the SR3NET01BD directly onto the side of the SR3 base unit on DIN rail. Then verify the 24V DC supply is present and stable. Because there are no moving parts, wear is minimal. Periodically inspect the RJ45 connection and confirm the operating temperature stays within -20 to 55 °C. Following these steps supports long service life.