DEC power distribution connectors
They were connected to the harness (which usually ended in a power distribution panel) using multi-pin AMP MATE-N-LOK connectors: the connectors on the panel used male shells (housings) with female pins; all the cables from the backplanes had female shells, with male pins.
Generally the DEC standard power wire colour coding was used.
The pinout of the 9-pin connector is:
Pin 1 is the pin nearest the ridge on the side of the shell; there are two corner keys on the 7-9 side of the shell, on the inside.
The pinouts of the 6-pin and 15-pin connector are:
Again, pin 1 is the pin nearest the ridge on the side of the shell, and there are two corner keys on the 4-6 side of the shell, on the inside.
|3||+20V or +15VC|
|6||+15B (Battery backup)|
|10||+5B (Battery backup)1|
|12||+5B (Battery backup)2|
|15||-15B (Battery backup)|
Once again, pin 1 is the pin nearest the ridge on the side of the shell, and there are two corner keys on the 13-15 side of the shell, on the inside.
Not all supplies/harnesses provided the battery backup voltages.
The AMP part numbers for the shells (AMP calls the female housings 'caps', and the male housings 'plugs') are below:
|Pin count||Male shell||Female shell|
An alternative 6-pin male shell is AMP 1-171196-0; it is compatible with the ones listed here, but is not one that DEC used, as far as is currently known.
The female pins (sockets, functionally) are AMP part number 60619-1; the male pins are 60620-1. (There are a large number of different pin options: 30-22, 24-18, and 20-14 gauge; tin and gold plated; and brass and phosphor-bronze material. The part numbers given are for tinned brass, 20-14 gauge.)
AMP has been bought by TE Connectivity, but these MATE-N-LOK connectors are still in production, and available from the usual suppliers.
The DEC part numbers for the male shells are 12-09350-06 and -15; the female shell numbers are 12-09351-06 and -15. These numbers are more historical curiosities than anything else; the AMP numbers, already given above, are what is needed to order them.
- Digikey's page for the line - click on 'Housings' at the bottom