User's Manual

UMAC CPCI Accessory Cx Family
12 Connector Pinouts
J1 Line Supply Input Connector
Pin # Symbol Function Description Notes
1 CHASSIS GND EARTH Connection to earth ground Important safety connection
2 ACN / DC IN+ INPUT Neutral input for AC supply;
positive input for DC supply
Signal level and type dependent on power
supply installed.
3 ACL / DC IN- INPUT Line input for AC supply;
negative input for DC supply
Signal level and type dependent on power
supply installed.
This connector on the rear side of the Acc-Cx backplane board provides the means for bringing power into the UMAC CPCI
system. These signals are simply passed through the backplane board to the power supply.
J2 Alternate Analog Power Connector
Pin # Symbol Function Description Notes
1 +12V RETURN Common Reference for +12V Supply Usually tied to –12V RETURN
2 +12V Input /
Output
+12V analog supply for
backplane
This pin can be used as input if the rack
supply does not have +12V; it can be used
as output if the rack supply provides it.
3 -12V Input /
Output
-12V analog supply for
backplane
This pin can be used as input if the rack
supply does not have +12V; it can be used
as output if the rack supply provides it.
4 -12V RETURN Common Reference for -12V Supply Usually tied to +12V RETURN