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Backplanes - detailed slot descriptions
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Backplanes - detailed slot descriptions

Notes: DD11 Unibus Backplane

Unibus Backplanes

Type Slots Description
DD11-A 4 The end slots are Unibus in rows A and B, one of the middle sp;slots, row A is for the power connection. Rows C to F are SPC.
DD11-B 4 The end slots are Unibus in rows A and B, the middle slots, rows A and B are for DF11. Rows C to F are SPC. Power connection is via a harness and faston tabs.
DD11-CF 4 The end slots are Unibus in rows A and B, the middle slots, rows A and B are MUD (?). Rows C to F are SPC. Power connection is via a soldered harness for a BA11-F mounting box.
DD11-CK 4 The end slots are Unibus in rows A and B, the middle slots, rows A and B are MUD (?). Rows C to F are SPC. Power connection is via a soldered harness for a BA11-K mounting box.
DD11-DF 9 The end slots are Unibus in rows A and B, the middle slots, rows A and B are MUD (?). Rows C to F are SPC. Power connection is via a soldered harness for a BA11-F mounting box.
DD11-DK 9 The end slots are Unibus in rows A and B, the middle slots, rows A and B are MUD (?). Rows C to F are SPC. Power connection is via a soldered harness for a BA11-K mounting box.

Detailed Slot Descriptions

Backplanes viewed from the wiring side.

DD11-A
A B C D E F
4 UNIBUS SPC
3 Power unused SPC
2 unavailable unused SPC
1 UNIBUS SPC

DD11-B
A B C D E F
4 UNIBUS SPC
3 DF11 SPC
2 DF11 SPC
1 UNIBUS SPC

DD11-C
A B C D E F
4 UNIBUS SPC
3 Modified UNIBUS SPC
2 Modified UNIBUS SPC
1 UNIBUS SPC

DD11-D
A B C D E F
9 UNIBUS SPC
8 Modified UNIBUS SPC
7 Modified UNIBUS SPC
6 Modified UNIBUS SPC
5 Modified UNIBUS SPC
4 Modified UNIBUS SPC
3 Modified UNIBUS SPC
2 Modified UNIBUS SPC
1 UNIBUS SPC

UNIBUS Pin Designations
Row A Row B
1 2 1 2
A INIT L +5V BG6 H +5V
B INTR L GND BG5 H GND
C D00 L GND BR5 L GND
D D02 L D01 L GND BR4 L
E D04 L D03 L GND BG4 H
F D06 L D05 L AC LO L DC LO L
H D08 L D07 L A01 L A00 L
J D10 L D09 L A03 L A02 L
K D12 L D11 L A05 L A04 L
L D14 L D13 L A07 L A06 L
M PA L D15 L A09 L A08 L
N GND PB L A11 L A10 L
P GND BBSY L A13 L A12 L
R GND SACK L A15 L A14 L
S GND NPR L A17 L A16 L
T GND BR7 L GND C1 L
U NPG H BR6 L SSYN L C0 L
V BG7 SO GND MSYN L GND

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Modified UNIBUS Pin Designations
Row A Row B
1 2 1 2
A INIT L +5V RESV +5V
B INTR L GND RESV TP
C D00 L GND BR5 L GND
D D02 L D01 L +5 BAT BR4 L
E D04 L D03 L INT SSYN PAR DET
F D06 L D05 L AC LO L DC LO L
H D08 L D07 L A01 L A00 L
J D10 L D09 L A03 L A02 L
K D12 L D11 L A05 L A04 L
L D14 L D13 L A07 L A06 L
M PA L D15 L A09 L A08 L
N PAR P1 PB L A11 L A10 L
P PAR P0 BBSY L A13 L A12 L
R +15 BAT SACK L A15 L A14 L
S -15 BAT NPR L A17 L A16 L
T GND BR7 L GND C1 L
U +20 CORE BR6 L SSYN L C0 L
V +20 CORE +20 CORE MSYN L -5 CORE

Unibus / Modified unibus difference
Row A Row B
1UB 1MUD 2UB 2MUD 1UB 1MUD 2UB 2MUD
A INIT L +5V BG6 H RESV +5V
B INTR L GND BG5 H RESV GND TP
C D00 L GND BR5 L GND
D D02 L D01 L GND +5V BAT BR4 L
E D04 L D03 L GND INT SSYN BG4 H PAR DET
F D06 L D05 L AC LO L DC LO L
H D08 L D07 L A01 L A00 L
J D10 L D09 L A03 L A02 L
K D12 L D11 L A05 L A04 L
L D14 L D13 L A07 L A06 L
M PA L D15 L A09 L A08 L
N GND PAR P1 PB L A11 L A10 L
P GND PAR P0 BBSY L A13 L A12 L
R GND +15V BAT SACK L A15 L A14 L
S GND -15V BAT NPR L A17 L A16 L
T GND BR7 L GND C1 L
U NPG H +20 CORE BR6 L SSYN L C0 L
V BG7 SO +20 CORE GND +20 CORE MSYN L GND -5V CORE

SPC Pin Designations
Row C Row D Row E Row F
1 2 1 2 1 2 1 2
A NPG IN +5V TP +5V GND +5V ABG OUT +5V
B NPG OUT -15V TP -15V ASSYN IN H -15V ABG IN -15V
C PA L GND A SEL 6 GND A12 L GND SSYN L GND
D LTC D15 L A OUT L BR7 L A17 L A15 L BBSY L F01 N1
E TP D14 L A SEL 4 BR6 L MSYN L A16 L F01 V2 D02 L
F TP D13 L A SEL 0 BR5 L A02 L C1 L D05 L D06 L
H D11 L D12 L A IN BR4 L A01 L A00 L D07 L A INT ENBB
J A INT B D10 L A SEL 4 A BR OUT SSYN L C0 L NPR L GND A
K TP D09 L A OUT BG7 SO A14 L A13 L D08 L A INT B
L A INT ENBB D08 L INIT L BG7 OUT A11 L TP D03 L F01 L2
M TP D07 L A INT ENBA BG6 SO A IN A OUT H INTR L F01 M2
N DC LO D04 L A INT A BG6 OUT A OUT L A08 L F01 N1 D04 L
P HALT REQ D05 L TP BG5 SO A10 L A07 L ABR OUT F01 P2
R HALT GRT D01 L TP BG5 OUT A09 L A SEL 4 F01 L2 F01 N1
S PB L D00 L TP BG4 SO A SEL 6 A SEL 0 F01 M2 F01 P2
T GND D03 L GND BG4 OUT GND A SEL 2 GND SACK L
U +15/+8 D02 L TP ABG IN A06 L A04 L A INT A ABR OUT
V AC LO D06 L ASSYN IN H ABG OUT A05 L A03 L A INT ENBA F01 F01

11/40 Power Distribution Panel

Connector: AMP 9 pin MATE-N-LOC™
Pin AWG Color Function Slot Pins
1 18 violet DCLO BF2, CN1
2 18 yellow ACLO BF1
3 18 blue -15V CB2, CC2, CD2, CE2
4 14 black GND
5 14 black GND
6 n/c
7 18 brown LTC CD1
8 14 grey +15V CU1
9 14 red +5V AA2, BA2, CA2, DA2, EA2, FA2

DD11-DK Power Connections

P2 Connector: AMP 15 pin MATE-N-LOC™ (Also on DD11-CK)
Pin AWG Color Function Slot Pins
1 14 red +5V AA2, BA2, CA2, DA2, EA2, FA2
2 18 grey +15V CU1
3 14 orange +20V core AU1, AV1, AV2
4 14 red +5V AA2, BA2
5
6
7
8 14 black GND
9 14 black GND
10
11
12 14 red +5VB BD1
13
14 18 brown -5V core BV2
15

P3 Connector: AMP 6 pin MATE-N-LOC™ (Also on DD11-CK)
Pin AWG Color Function Slot Pins
1 14 black GND
2 18 brown LTC CD1
3 18 violet DCLO BF2, CN1
4 18 yellow ACLO BF1
5
6

P4 Connector: AMP 15 pin MATE-N-LOC™ (Not available on DD11-CK)
Pin AWG Color Function Slot Pins
1 14 red +5V AA2, BA2, CA2, DA2, EA2, FA2
2
3 14 orange +20V core AU1, AV1, AV2
4 14 red +5V AA2, BA2, CA2, DA2, EA2, FA2
5
6 18 white +15VB AR1
7
8 14 black GND
9 14 black GND
10
11
12
13 18 blue -15V CB2, CC2, CD2, CE2
14
15 18 green -15VB AS1

Original here

Power supply connectors

These connectors are all “MATE-N-LOK” connectors from TE Connectivity. This connector family consists of housings and pins sold separately in different form factors and pin sizes. Some parts can be obtained from conrad.nl; search for MATE-N-LOK.

I got the following to work with the connectors:

  • TE Connectivity 163304-2 Krimpcontact MATE-N-LOK, female pin, max 15A, 17 AWG Max, 20AWG Min, min dwarsdoortsnede 0.5mm2, max 1.0mm2

The corresponding pin seems to be this:

A male housing that is not fully compatible but which has at least proper spacing seems to be this:

© 2024 by Frits Jalvingh. All information in here can be freely used (MIT License)