Vicor 4kW MegaPAC-EL AC-DC Switchers - Manual (Page 17)

UG:108 vicorpower.com Applications Engineering: 800 927.9474 Page 17
Interface Connections (Cont.)
Signal Ground (J10-1, J10-2, J10-12, J10-15)
Signal Ground (see Figure 4) is an isolated ground reference for all J10 interface signals
used as a reference for ConverterPAC output status signals such as Power Good. This is
not the same as Earth Ground on input power connector J1.
Enable/Disable and General Shutdown (GSD)
The Enable/Disable control lines allow ConverterPAC outputs to be sequenced either
on or off. For DualQPACs, both outputs are sequenced. In parallel arrays, only the
driver ConverterPAC needs to be sequenced. The GSD control line on J10-5 allows
simultaneous shutdown of all ConverterPAC outputs. An internal factory-configured
jumper selects polarity, either active-high or active-low. Another jumper selects a pull-
up or pull-down source for the HCMOS control inputs.
The standard Enable/Disable controls are configured as active-low with internal pull-
up; outputs are enabled when these pins are open-circuited or allowed to exceed 4.5 V
with respect to Signal Ground. Outputs are disabled when the Enable/Disable control
lines are pulled low to less than 0.7 V. The GSD control line is configured to be active-low
with internal pull-up; all outputs are simultaneously inhibited when the GSD control
line is pulled low to less than 0.7 V. All outputs are enabled when GSD is open circuited
or allowed to exceed 4.5 V. The polarity of both the ED and GSD lines as well as pullup
or pull down can be reversed as a factory option per below diagramDo not apply more
than 5 V to these inputs at any time. The E/D and GSD circuits will sink up to 0.6 mA. If
driven from an electromechanical switch or relay, a small capacitor should be connected
between the control line and Signal Ground to eliminate latch-up due to the effects of
switch bounce (1mF, typical).
Figure 4.
Interface Connector (J10)
Gate # 1 Input (isolated)
25
J10 INTERFACE CONNECTOR IDENTIFICATION
Analog Temperature
Overtemperature Warning
14
1
16 15
2 3 4
19 18 17
5 6
22 21 20
7 8 9
24 23
11 10 12
Signal Ground 1
Enable/Disable # 8
Enable/Disable # 10
No Connection
General Shutdown
Signal Ground
Signal Ground
Enable/Disable # 2
Enable/Disable # 4
Enable/Disable # 6
7
13
12
11
1O
9
8
4
6
5
3
2 13
A.C. Power Fail
A.C. Power OK
Vcc +5 volt, 300 mA
Vcc +5 volt, 300 mA
Signal Ground
Enable/Disable # 7
Enable/Disable # 9
Phase Fail
Gate # 10 (Output (Isolated)
Enable/Disable # 1
Enable/Disable # 3
Enable/Disable # 5
14
19
18
17
16
15
21
25
24
23
22
20
End of Life - Not Recommended for New Designs