Remote fencing with an APC Masterswitch Plus (with an AP9606) « jcm's blog
UPS Network Management Card- AP9606 – Constant Power
FTDI USB RS232 TO DB9 D SUB 9 PIN MALE ADAPTER APC 940 0024E CONSOLE DEBUG CABLE FOR APC SMART UPS AP9606 AP9617 AP9618 AP9619|Computer Cables & Connectors| - AliExpress