Introduction
The STBDRA3290 is a standard 2-channel high-current relay output module from Schneider Electric’s Advantys STB series. It switches 24V DC or 115/230V AC loads at 7 A per channel. This module is now discontinued and superseded by the Modicon X80 range. For plants still running Advantys STB islands, that creates a real cost problem. A single failed relay module can idle an entire production cell. SpareTechPLC helps you avoid that downtime and plan a cost-effective upgrade path.
Key Specifications That Drive Cost and Efficiency
7 A Per Channel
Each channel handles 7 A. That means one STBDRA3290 can directly drive high-current loads such as contactors, solenoid valves, or indicator banks. You avoid buying and wiring separate interposing relays. Fewer components means lower panel cost and less wiring labor.
1780V AC Field-to-Bus Isolation
The 1780V AC isolation protects the bus side from field transients. In mixed AC/DC cabinets, this isolation reduces the risk of cross-channel faults. Fewer faults mean fewer unplanned maintenance calls and lower spare-part consumption.
Hot Swapping
Hot swapping lets you replace the module while the island stays powered. In a 24/7 plant, that can save hours of lost output per event. Over a year, those hours add up to real revenue protection.
Compact I/O Base
The module mounts on the STBXBA3000 I/O base, which is only 28.1 mm wide. The STBPDT3100 PDM supplies 24V DC. This compact footprint frees panel space and keeps cabinet costs down.
Where the STBDRA3290 Fits
Material Handling and Packaging
Conveyor diverters and packaging lines often use relay outputs to switch motor starters and air valves. The 7 A rating lets the STBDRA3290 drive these loads directly. You save the cost of extra relays and the labor to wire them.
Building Automation Panels
Lighting banks and damper actuators commonly run on 115/230V AC. The STBDRA3290 switches these loads with 1780V AC isolation. That keeps control and field circuits safely separated.
Legacy System Support
Many sites still run Advantys STB islands. When a relay module fails, the replacement cost is only part of the story. The bigger cost is downtime. Keeping a tested spare on the shelf is the cheapest insurance.
Replacement and Upgrade Path
Schneider has discontinued the STBDRA3290 and moved to the Modicon X80 range. You have two practical options.
First, source tested STBDRA3290 units from SpareTechPLC to keep existing islands running. This is the lowest-cost path when you need a drop-in fix.
Second, plan a staged migration to Modicon X80. This path costs more up front but restores long-term parts availability. It also reduces future maintenance risk. SpareTechPLC can help you compare both options against your downtime cost.
Installation Notes
Mount the module on the STBXBA3000 I/O base and supply 24V DC through the STBPDT3100 PDM. The IP20 rating means the module belongs inside a protected cabinet. Keep the cabinet free of conductive dust and moisture. Follow Schneider’s Advantys STB installation guide for wiring and grounding. Do not exceed 7 A per channel.
Maintenance and Reliability
Relay contacts wear over time, especially when switching inductive loads. Inspect the module periodically for contact pitting or heat marks. Keep spare units on hand to support hot swapping. In a cost analysis, one avoided hour of downtime often pays for several spare modules. Store spares in a dry, temperature-stable area.
Selection Checklist
Before you buy, confirm the following:
- Your island uses the STBXBA3000 I/O base and STBPDT3100 PDM.
- Your load current stays within 7 A per channel.
- Your signal type matches 24V DC or 115/230V AC.
- You have a plan for long-term support, since the module is discontinued.
SpareTechPLC supplies tested STBDRA3290 modules and can advise on Modicon X80 migration. Contact us with your island configuration and load details.
Frequently Asked Questions
Is the STBDRA3290 still in production?
No. Schneider Electric has discontinued it and superseded it with the Modicon X80 range. SpareTechPLC can confirm current availability and replacement options.
Can I replace the module while the system is running?
Yes. The module supports hot swapping, so you can replace it without shutting down the island.
What is the maximum current per channel?
Each channel handles up to 7 A. Do not exceed this rating.
What isolation does the module provide?
It provides 1780V AC isolation between the field side and the bus side.
Which base and PDM does it need?
It uses the STBXBA3000 I/O base and the STBPDT3100 PDM with 24V DC supply.
