Your UPS can only talk on one channel out of the box. You want SNMP monitoring on one card and a serial link to your BMS on another, but plugging in the second card kicks the first offline. The PSECB solves that. It runs a second comms card over the UPS serial port while your primary card stays in the intelligent slot, both live at the same time. Runs off its own 240Vac/12Vdc power pack, so you're not stealing current from the battery management circuit. No internal mods, no voiding your warranty
| brand | PowerShield |
| model | PSECB |
| type | External Communications Box |
| power_supply_included | 240Vac / 12Vdc |
| connection | UPS serial port + intelligent slot |