| Fabricante | Eaton |
| Data Link Protocol | RS-232 |
| Gama productos | Eaton |
Provides a connection to automation and building management systems as well as shutdown link to IBM iSeries servers with AS 400 style interface. It can also be used as an RS232 card to provide an extra serial port. The Relay Card-MS is compatible with all Eaton UPSs that have a Minislot.