Your APC Easy UPS Online SRV needs a way to talk to the rest of your rack. This dry contact relay I/O card slots in and gives you clean on/off signalling — shut down a server, trip an alarm, or feed a status line to your BMS without wiring a separate relay box. Straightforward install. No firmware gymnastics. Just the signal path your setup was missing
| brand | APC |
| product_type | Dry Contact Card / Relay I/O Card |
| compatible_series | APC Easy UPS Online SRV |
| category | Electronics & Components |
| subcategory | Power & Batteries |
| sku | UPAPC-VGL9901I |