Why Network Your SR3 Relay Cabinet?
Standalone smart relays often leave machine data stranded on the factory floor. The SR3NET01BD from Schneider Electric closes that gap. This Ethernet communication interface module plugs into the Zelio Logic SR3 platform and turns a 24V DC smart relay into a networked node. Instead of manual data collection or isolated control, engineers gain direct Modbus TCP access over a standard RJ45 connection.
What Is the SR3NET01BD?
Schneider Electric built this module as part of the Zelio Logic range. It is not a standalone controller. It is a dedicated communication interface that side-mounts onto compatible SR3 24V DC smart relays. The module draws its supply voltage directly from the base unit, so no separate power wiring is required. Once installed, it provides a 10/100 Mbps Ethernet port using the RJ45 standard and speaks Modbus TCP natively.
Technical Specifications That Matter
Ethernet Interface and Protocol
The RJ45 port supports 10/100 Mbps speeds. Modbus TCP is the supported protocol, which means the module integrates with SCADA systems, HMIs, and PLC networks that already use this standard. You do not need proprietary gateways or conversion hardware.
Power and Mounting
The module takes 24V DC from the SR3 base unit. This shared power design simplifies cabinet wiring and reduces terminal block usage. DIN rail side-mounting keeps the footprint compact, which matters when panel space is tight.
Environmental Range
An operating temperature range of -20 to 55 °C covers most industrial enclosures, from cold storage areas to warm process rooms. Protection rating is not available in the current data, so verify enclosure requirements for your specific environment.
Where This Module Fits
Modbus TCP Integration
Plants running Modbus TCP networks can add SR3 relay control without replacing existing infrastructure. The module acts as a bridge between the smart relay and the supervisory system.
Remote Monitoring
Machine builders can expose SR3 status and diagnostics to remote dashboards. Maintenance teams see faults before they become downtime events.
Panel Space Optimization
Because the module side-mounts on the SR3 and shares its power supply, it adds networking capability without a separate power supply or bulky gateway.
Installation and Setup
Mounting is straightforward: the module attaches to the side of a compatible SR3 24V DC smart relay and secures to DIN rail. Power comes from the base unit, so no additional 24V DC wiring is needed. Connect a standard RJ45 Ethernet cable to the module port. Configure Modbus TCP settings according to your network architecture. Always follow Schneider Electric’s installation documentation for exact procedures.
Compatibility and Integration
This module works with SR3 24V DC smart relays in the Zelio Logic series. It communicates over Modbus TCP, which is widely supported by SCADA platforms, HMI panels, and PLCs. If your control system already uses Modbus TCP, integration is typically a configuration task rather than a hardware redesign.
Selection Guide
Before ordering, confirm your base relay is an SR3 24V DC model. Verify that your network uses Modbus TCP. Check that your enclosure maintains the -20 to 55 °C operating range. The SR3NET01BD is active in production as of September 2026. For current availability and replacement options, contact SpareTechPLC.
Maintenance and Reliability
Inspect the module periodically for loose connections and dust buildup. Follow Schneider Electric’s safety manual for all maintenance activities. The wide temperature range supports reliable operation in diverse environments. Because the module has no moving parts, wear is minimal. Focus on environmental controls and cable integrity.
Frequently Asked Questions
What relay models work with the SR3NET01BD?
It is compatible with SR3 24V DC smart relays in the Zelio Logic series.
Does this module require a separate power supply?
No. It draws 24V DC directly from the SR3 base unit.
Which communication protocol does it support?
Modbus TCP over a 10/100 Mbps RJ45 Ethernet interface.
What is the operating temperature range?
-20 to 55 °C.
Is the SR3NET01BD still in production?
Yes, it is active in the Zelio Logic range as of September 2026. Contact SpareTechPLC for availability.
