Replacement and Upgrade Guide for the STBACO8220
Finding a reliable source for the STBACO8220 is critical when your Advantys STB system depends on precise analog output. Schneider Electric has discontinued this 2-channel HART analog current output module and superseded it with the Modicon X80 range. That makes replacement planning essential for any plant still running Advantys STB I/O.
This module delivers two independently isolated 4-20 mA current outputs with HART communication. It suits applications where analog signals must carry both process data and configuration information over the same pair of wires.
Technical Specifications That Matter
The STBACO8220 offers 15-bit resolution plus sign, which translates to fine control over output values. With accuracy of ±0.3% FS at 25 °C and integral linearity of ±0.05% FS, it maintains monotonic behavior across the full range. Temperature drift sits at just ±0.005% FS/°C, so ambient swings affect output less than many competing modules.
An update time of 8 ms supports responsive control loops. The 1500V DC field-to-bus isolation protects your control system from ground loops and voltage spikes. Hot swapping lets you replace the module without shutting down the bus, which reduces downtime during maintenance.
The module requires a 24V DC supply via a PDM (STBPDT3100) and mounts on an I/O base (STBXBA1000, 13.9 mm). The IP20 rating means it belongs inside a protective enclosure.
Where This Module Fits Best
Process Control with HART Diagnostics
Chemical and petrochemical plants often use HART to read valve positioner feedback while sending the 4-20 mA setpoint. The STBACO8220 handles both on each channel, so you avoid extra wiring and separate diagnostic hardware.
Upgrading Legacy Advantys STB Systems
If you operate an existing Advantys STB island, this module drops into your current architecture. During a migration to Modicon X80, you can keep spare STBACO8220 units on hand to maintain production until the transition completes.
Water Treatment and Remote Monitoring
Water utilities rely on 4-20 mA loops for pump speed and chemical dosing. The 15-bit resolution and low temperature drift help maintain consistent dosing even when cabinet temperatures vary.
Installation and Setup
Mount the module on the STBXBA1000 I/O base and connect the STBPDT3100 PDM for 24V DC power. Because the channels are independently isolated, you can wire each output to a separate field device without creating ground loops. Keep the module inside an IP20-rated enclosure and follow Schneider Electric’s Advantys STB installation manual for wiring and configuration. Do not attempt field wiring without confirming the correct terminal assignments from the official documentation.
Maintenance and Reliability
Hot swapping simplifies replacement, but you should still inspect connections periodically for corrosion or loosening. Verify that the PDM supplies stable 24V DC, since voltage sags can cause output errors. Because operating and storage temperature limits are not available in the current data, confirm environmental limits with SpareTechPLC before deploying in extreme conditions. General maintenance includes checking terminal torque and confirming that the module seats firmly on the base.
Compatibility and Integration
The STBACO8220 works within the Advantys STB ecosystem, including the STBXBA1000 base and STBPDT3100 PDM. It communicates HART data over the 4-20 mA loop, so it integrates with HART-compatible hosts and asset management systems. If you plan to migrate to Modicon X80, consult Schneider Electric’s migration guides for equivalent modules.
What to Verify Before You Buy
Because the STBACO8220 is discontinued, confirm current availability and replacement options with SpareTechPLC. Check that your existing base and PDM match the required part numbers. Ask about warranty and testing procedures. If you need a long-term solution, request a comparison with the Modicon X80 replacement to plan your upgrade path.
Frequently Asked Questions
Is the STBACO8220 still in production?
No. Schneider Electric has discontinued this module and superseded it with the Modicon X80 range. Contact SpareTechPLC to check remaining stock or discuss a replacement.
Can I use the STBACO8220 with my existing Advantys STB base?
Yes, provided you use the STBXBA1000 I/O base and STBPDT3100 PDM. The module is designed for that ecosystem.
What is the resolution of the analog output?
The module offers 15-bit resolution plus sign, with accuracy of ±0.3% FS at 25 °C.
Does the STBACO8220 support hot swapping?
Yes, hot swapping is supported, which allows replacement without powering down the bus.
What should I do if I need a long-term replacement?
Evaluate the Modicon X80 range as the official successor. SpareTechPLC can help you compare specifications and plan the migration.
