today picked up a:

PB 145B - looks good, not working

PB 165-Works perfect

PB 190cs-Looks good, not tested yet

PB 520c-Has issues

Power Sniffer

Looks like a chubby SCSI 68 pin gender changer.

Name I/O C/D SEL TRM ACK REQ BSY

LED colour Grn Yel Grn Red Grn Yel Red

Tempwr Safe

SafeXXX On Yel

Switch

On the back it says intelligent terminator