UG:107
vicorpower.com
Applications Engineering: 800 927.9474
Page 13
3 Phase and 4kW MegaPACs “Quick Install” Instructions (Cont.)
Sense Connections
Note: Newer power supplies may have a new feature installed called Autosense. For
units with Autosense, if Remote Sense connections are not made or needed, no Local
Sense selection is necessary - simply connect the output to the load and the unit will
automatically operate in Local Sense. If Remote Sense connections are made, the unit
will operate in a Remote Sense mode. Remote Sense terminals should be terminated to
their respective output i.e. - RS to -Output and + RS to +Output. See page 15 for more
information on Autosense.
For units without Autosense, sense connections must always be made. Not
connecting Sense lines to their respective outputs can cause failure to the unit.
Sense Connector J2 (P2 for the UniPAC):
n
Sense connections do not have to be made if the Local Sense option has been ordered.
(An “L” in the ConverterPAC part number means the Local Sense option has been
installed; e.g. M5V/40AL. Only applies to units without Autosense.)
n
Use Molex mating receptacle #50-57-9403 with #16-02-0103 terminals provided.
n
J2-2 is the +Sense and J2-3 is the -Sense.
n
Attach terminals to 22-24 AWG twisted pair wire using Molex tool #11-01-0208.
n
Attach opposite ends of Sense lines to point where regulation is desired.
n
Verify that Sense lines are not cross-connected before applying input power.
n
For the UniPAC, P2-7 is the + Sense and P2-6 is the -Sense.
n
Use Molex mating receptacle #39-01-0073 with #39-00-0031 terminals provided
n
Attach terminals to 22-28 AWG stranded wire using Molex tool #57005-5000.
Sense Connectors on DualPACs:
n
Sense connections do not have to be made if the Local Sense option has been ordered.
(An “L” in the ConverterPAC part number means the Local Sense option has been
installed; e.g. D5V/20AL-12V/4.2AL. Only applies to units without Autosense.)
n
Sense connections are available on the J2, P2 or the J1A and J1B connectors.
n
If using J2 or P2 connectors, see page 11.
n
For J1A and J1B, Pin 3 is the +Sense and Pin 6 is the -Sense.
n
Use Molex mating receptacle #39-01-2060 with #39-00-0039 terminals provided.
n
Attach terminals to 18-24 AWG twisted pair wire using Molex tool #11-01-0197.
n
Verify that Sense lines are not cross-connected before applying input power.
6 -REMOTE SENSE
3 +REMOTE SENSE
2 & 5 -V OUT
1 & 4 +V OUT
PIN
J1B
+
4
6
-
5
+
+RS -
-RS
3
2
1
J1A
3
2
1
4
6
+RS
-RS
+
+
-
5
-
DualPAC Output Connectors
J2 Sense Connectors
1
2
3
Sense Connector
J2-1 Trim Pin Access
J2-2 +Sense
J2-3 -Sense
Pin
J2
POWER GOOD INVERTED
P2 REMOTE SENSE,
TRIM/SC & POWER GOOD
3
2
4
1
POWER GOOD
SIGNAL GROUND
Vcc IN
7
6
5
+SENSE
-SENSE
TRIM
