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 sockets (i.e. 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)|
|12||+5B (Battery backup)|
|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.
Note: On the H777 Power Supply, versions UA, UB, used with the PDP-11/24 in the BA11-L mounting box, pins 6 and 15 are +12V/-12V, for use with the MS11-M MOS memory; pin 3 is +15C. (This unit did not use a harness, the connectors are on the power supply casing.)
The female sockets (female pins) 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.)
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|
AMP has been bought by TE Connectivity, but these MATE-N-LOK connectors are still in production, and available from the usual suppliers.
- Digikey's page for the line - click on 'Housings' at the bottom