Vicor Westcor PFC Mini Power Factor Corrected AC-DC Switcher - Manual (Page 8)

UG:115 vicorpower.com Applications Engineering: 800 927.9474 Page 8
Sense Connections
Note: PFC Mini units built after 12/2000 have been equipped with a feature called Autosense. If no
Sense connections are made, the PFC Mini will automatically operate in Local Sense mode. If Remote
Sense connections are made, the PFC Mini will operate in a Remote Sense mode.
For units built before 12/2000 (units without Autosense), Sense connections must
ALWAYS be made. Not connecting Sense Lines to their respective outputs can cause
failure to the unit.
Sense connections on output connections with studs
n PFC Minis are currently shipped with Autosense installed. Those without the
Autosense were shipped with Local Sense installed. (See note on Page 14)
n If Remote Sense is desired, remove jumpers MBJ1 and J3, located behind the
Sense connector.
n Connector pin SxJ2-2 is the +Sense and SxJ2-3 is the -Sense.
n Use Molex mating receptacle #50-57-9403 with #16-02-0103 terminals.
n Attach terminals to 20-22 AWG stranded twisted pair wire using
Molex tool #11-01-0208.
n Attach opposite end of sense lines to point where regulation is desired.
n Verify that sense lines are not cross-connected.
Sense connections on output connection with Molex connectors
n PFC Minis are currently shipped with Autosense installed. Those without the
Autosense were shipped with Local Sense installed. (See note on Page 14)
n If Remote Sense is desired, remove jumpers on MBJ1 and J3, located on
either side of the output connector.
n Connector pin SxJ1-4 is the +Sense and SxJ1-5 is the -Sense for output #1.
SxJ1-13 is the +Sense and SxJ1-15 is the -Sense for output #2.
n Use Molex mating receptacle #39-01-2180 with #39-00-0039 terminals.
n Attach 18-24 AWG stranded twisted pair wire using Molex tool #11-01-0197.
Trim Connections
Trim connections on outputs with studs:
n SxJ2-1 provides Trim access.
n Use Molex mating receptacle #50-57-9403 with #16-02-0103 terminals.
n Attach 20-22 AWG stranded wire using Molex tool #11-01-0208.
Trim connections on outputs with Molex connectors:
n SxJ1-14 provides Trim access for output #1, and SxJ1-6 provides Trim access
for output #2.
n Use Molex mating receptacle #39-01-21 with #39-00-0039 terminals.
n Attach 18-24 AWG stranded wire using Molex tool #11-01-0197.
Remove jumpers for
Remote Sense
Remove jumpers for
Remote Sense on
Output # 1
Remove jumpers for
Remote Sense on
Output # 2
Connector J2
1
2
3
Trim Connector
Trim Pin Access
+Sense
-Sense
Pin
SxJ2
SxJ1 Dual Output connector
T
T
+S
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18
+ - - -S + + -
+ + - +S -S + - -
M1 Output
M2 Output
Locking Key
Pin 1 Identifier