User's Manual

UMAC CPCI Accessory Cx Family
Connector Pinouts 11
P{x+1}: Power Supply (P47-Style) Connector
For a backplane board with x data slots, the connector P{x+1} (e.g. P9 for the Acc-C8 8-slot board) is the
power-supply connector.
Pins 1-20: Size 16 Power-Supply Outputs to Backplane
Pin No. Description Pin No. Description
1 +5V (V1) 11 +5V/+3.3V Return (ground plane)
2 +5V (V1) 12 +5V/+3.3V Return (ground plane)
3 +5V (V1) 13 +3.3V (V2)
4 +5V (V1) 14 +3.3V (V2)
5 +5V/+3.3V Return (ground plane) 15 +3.3V (V2)
6 +5V/+3.3V Return (ground plane) 16 +3.3V (V2)
7 +5V/+3.3V Return (ground plane) 17 +3.3V (V2)
8 +5V/+3.3V Return (ground plane) 18 +3.3V (V2)
9 +5V/+3.3V Return (ground plane) 19 +12V Return (ground plane)
10 +5V/+3.3V Return (ground plane) 20 +12V (V3)
Pins 21-44: Size-20 Signal Interface Pins
21 -12V (V4) 33 +3.3V Sense (connect to center of +3.3V
power plane)
22 Signal Return 34 Sense Return
23 Reserved (no connection) 35 V1 Share (no connection on single-supply
backplane)
24 -12V Return (ground plane) 36 +12V Sense (connect to center of +12V
power plane)
25 GA0 (Supply slot address bit 0 – ground for
supply slot 0)
37 SMB SCL (no connection)
26 Reserved (no connection) 38 DEG#
27 EN# (ground plane) 39 INH# (leave open for no inhibit function)
28 GA1 (Supply slot address bit 1 – ground for
supply slot 0)
40 SMB SCL (no connection)
29 V1 ADJ (no connection – for nominal
voltage)
41 V2 Share (no connection on single-supply
backplane)
30 +5V Sense (connect to center of +5V power
plane)
42 FAL#
31 GA2 (Supply slot address bit 2 – ground for
supply slot 0)
43 SMB PWR (no connection)
32 V2 ADJ (no connection – for nominal
voltage)
44 V3 Share (no connection on single-supply
backplane)
Pins 45-47: Size-16 Power-Supply Inputs from Backplane
45 Chassis GND
46 ACN / +DC In (AC Neutral/ Positive DC
input)
47 ACL / -DC In (AC Line/ Negative DC input)