Vicor 4kW MegaPAC AC-DC Switchers - Manual (Page 18)

UG:107 vicorpower.com Applications Engineering: 800 927.9474 Page 18
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,
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.
Enable/Disable and General Shutdown (GSD)
The Enable/Disable control lines allow ConverterPAC outputs to be sequenced either
on or off. For DualPACs, 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. Do 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). As noted, active
polarity and pull-up/down can be altered in the factory.
Figure 4.
Interface Connector (J10)
Figure 5.
Enable/Disable and
General Shutdown
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
10
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
10K
Signal Ground 1, 2, 12, 15
J10
General Shutdown 5
Enable/Disable Output #1 24
+5 Volt Vcc 16
10K
499
499
JP1 JP2
1 2 3 1 2 3