Operator`s manual
Pg. 10 Vicor 800-735-6200 Westcor Division 408-522-5280 Applications Engineering 978-749-3524 or -3525
Rev. 1/99
3 Phase MegaPAC Owner’s Manual
Output Power Connections (+P, -P for Single Output, or J1A/J1B for Dual Outputs)
For single output ConverterPACs, these terminals are two 1/4-20 plated steel studs. The upper stud is positive with
respect to the lower stud. For dual output ConverterPACs, there is a 6-pin Molex connector for each output. J1A
pins 1 and 4 are the +Output, and J1A pins 2 and 5 are the -Output. Pins 3 and 6 are duplicates of the Remote
Sense terminals present on J2A and J2B. Use appropriate wire size rated to handle the full output current, includ-
ing short circuit levels. Avoid large current loops in output cables; run power and return cables next to one another
to minimize inductive effects. All outputs are isolated and can provide positive or negative outputs.
Output +/-Sense Connections (J2 for Single Output, or J2A/J2B for Dual Outputs)
Although all outputs are open-Sense protected, the +/-Sense terminals MUST be connected to their respective out-
puts before the 3 Phase MegaPAC is powered up. Regardless of the output polarity configured, the +Sense should
always connect to the +Power output. The -Sense connects to the -Power output. Sense connections are not
required on booster ConverterPACs, BatPACs, or if the Local Sense option is specified. Sense pins can be accessed
on J1A/J1B or J2A/J2B on dual output units.
Signal Ground (J10-1, 2, 12, 15)
Signal Ground (see Figure 11) is an isolated ground reference for all J10 interface signals, and can be used for
ConverterPAC output status signals such as Power Good. This is not the same as Earth Ground on input power
connector J1.
Input Connectors
J1
L1
L2
L3
Figure 10. Input Panel Connector
J10 INTERFACE CONNECTOR IDENTIFICATION
1 Signal Ground 14 Phase Fail Warning
2 Signal Ground 15 Signal Ground
3 Overtemp. Warning 16 Vcc +5 volt, 300 mA
4 Analog Temperature 17 Vcc +5 volt, 300 mA
5 General Shutdown 18 Input Power OK
6 No Connection 19 Input Power Fail
7 Enable/Disable #10 20 Enable/Disable #9
8 Enable/Disable #8 21 Enable/Disable #7
9 Enable/Disable #6 22 Enable/Disable #5
10 Enable/Disable #4 23 Enable/Disable #3
11 Enable/Disable #2 24 Enable/Disable #1
12 Signal Ground 25 Gate Out Slot #10 (isolated)
13 Gate In Slot #1 (isolated)
2
3
4
5
6
7
1
8
9
1011
12
13
14 15
1617 18 19
20 21 2223
24 25
J10
Figure 11. Interface Connector (J10)