9; yes; it has the standard 9-pin connector as used on the 11/05-10, and the early /40s and /45s. (FWLIW, the documentation for the PM-F11 says that _it_ comes with either the same 9-pin connector power harness, or the harness with the newer 15-/6-pin connector pair, and gives part numbers for each.) The harness of this one is subtly different, though - instead of all fast-on tabs at the backplane end, there is a DuPont header on the backplane (looks like 10 pin), and a bunch of the pins on the large 9-pin connector are connected to that (not just ACLO and DCLO, but e.g. there are a pair which are connected to +5V, and another pair to ground (the latter two also go to fast-on tabs). Oh, I'm sure it's _some_ form of SPC backplane - it has the NPG jumpers from CA1 to CB1 on all 9 slots, for instance. And it has a bunch of wires running is routed from 1A down to CA1/CA2, and then back up to 9A. But I'm trying to figure out exactly what sort of SPC backplane it is. E.g. it looks like slots 2-8 _might_ be MUD (the signals from 1A/B are bussed across all those slots on A/B, over to 9A/B). But without documentation, or a lot of ohm-meter work... Noel