Introduction to the STBDRC3210 Relay Output Module
The STBDRC3210 is a standard 2-channel relay output module from Schneider Electric’s Advantys STB series. It provides reliable switching for industrial control circuits that operate on either 24V DC or 115/230V AC. Each channel delivers up to 2 A, making this module suitable for driving relays, solenoids, and indicator lamps in distributed I/O architectures. Because Schneider has discontinued this module and superseded it with the Modicon X80 range, buyers must act quickly to secure remaining stock or plan a migration. SpareTechPLC specializes in helping maintenance teams navigate exactly this kind of transition.
Key Technical Specifications
The STBDRC3210 combines two Form C relay outputs with robust isolation and hot-swap capability. The table below summarizes the core parameters.
| Specification | Value |
|---|---|
| Module type | Standard relay output module |
| Channels | 2 |
| Output type | Relay, C-type (Form C) |
| Signal type | 24V DC or 115/230V AC |
| Output current | 2 A per channel |
| Coil voltage | 24V DC |
| Isolation | 1780V AC field-to-bus |
| Hot swapping | Yes |
| Supply voltage | 24V DC (via PDM) |
| I/O base | STBXBA2000 (18.4 mm) |
| PDM | STBPDT3100 (24V DC) |
| Protection rating | IP20 |
| Weight | 0.130 kg |
The 1780V AC field-to-bus isolation protects the control bus from voltage spikes on the field side. This matters in mixed-voltage cabinets where 115/230V AC loads sit near sensitive 24V DC logic. Hot swapping lets technicians replace the module without shutting down the entire segment, which reduces downtime during urgent repairs. The 2 A per channel rating supports a wide range of pilot devices without intermediate relays.
Replacement and Upgrade Guide
Schneider has officially discontinued the STBDRC3210 and points users toward the Modicon X80 range. If you maintain an Advantys STB island, you face two paths: stock up on the original module or migrate to the newer platform. The STBDRC3210 remains a drop-in solution for existing STB installations, so keeping spares on hand is the fastest way to avoid unplanned outages. For new projects, the Modicon X80 platform offers a forward-looking architecture. SpareTechPLC can help you compare both options and verify current availability before you commit.
Installation and Setup Notes
The STBDRC3210 mounts on an STBXBA2000 I/O base, which measures 18.4 mm wide. Power comes through an STBPDT3100 PDM that supplies 24V DC. Because the module supports hot swapping, you can install or remove it while the segment is powered, provided you follow Schneider’s safety procedures. Always confirm that field wiring matches the signal type: 24V DC or 115/230V AC. The IP20 rating means the module belongs inside a protected cabinet, away from dust and moisture.
Maintenance and Reliability
Relay outputs have mechanical contacts that wear over time, so periodic inspection is essential. Check for pitting, discoloration, or sticking contacts during scheduled maintenance windows. Keep the cabinet environment clean and within the operating limits defined by Schneider. Since the STBDRC3210 is discontinued, maintaining a small stock of spares protects your operation against long lead times. A single spare module on the shelf can save hours of downtime when a relay fails.
Frequently Asked Questions
Is the STBDRC3210 still available?
Schneider has discontinued this module and superseded it with the Modicon X80 range. Contact SpareTechPLC to verify current stock and discuss replacement options.
Can I replace the STBDRC3210 while the system is running?
Yes. The module supports hot swapping, so you can replace it without powering down the segment, provided you follow all site safety procedures.
What load can each channel handle?
Each of the two Form C relay channels handles up to 2 A. The contacts work with 24V DC or 115/230V AC signals.
What base and PDM does it need?
The module mounts on an STBXBA2000 I/O base and requires an STBPDT3100 PDM for 24V DC supply.
Why does isolation matter on this module?
The 1780V AC field-to-bus isolation protects the control bus from voltage spikes and noise on the field side, which improves reliability in mixed-voltage cabinets.
