This section describes the GX5055’s power connector J7. This 9-pin connector
provides
VDD, VCC and VEE power to the handles all the external power supplies
to the GXx5055.
Pin |
Name |
Function |
Pin |
Name |
Function |
1 |
VCC |
High rail voltage |
6 |
GND |
|
2 |
VCC |
High rail voltage |
7 |
GND |
|
3 |
VEE |
Lower rail voltage |
8 |
GND |
|
4 |
VEE |
Lower rail voltage |
9 |
GND |
|
5 |
3.3(VDD) |
3.3 volt logic |
9-pin Connector J7
The VCC voltage must be at least 3 volts above the drive high voltage level. E.g, for a +15 volt drive high level, the VCC rail must be at least +18 volts. Similarly, the VEE voltage must be at least 4 volts less than the drive low voltage level. E.g. for a -10 volt drive low level, the VEE voltage rail must be at least -14 volts. For high performance operation (i.e. high slew rate), each GX5055 card can consume up to +6 amps for the +18 volt and -14 volt rails.
Pin 5 allows the user to power the 3.3 volt logic for the GX5055 from an external supply as well. However, it is not required that this voltage be supplied externally since the PXI backplane supplies this voltage rail. This option is provided if the PXI chassis does not have sufficient 3.3V current. Each GX5055 card requires 3.7A @ 3.3V, maximum. Selecting the source for the 3.3 V is controlled by the DioSetPowerConnect function call.
Note: If the GX5055 is configured to operate in a GX7015 / GX7005 chassis, VDD power will be supplied via the PXI J5 backplane connector via a factory configured, jumper option.
Minimum / Maximum Operating Conditions:
● Minimum VCC and VEE span: 13 volts min
● VCC min: 10 volts
● VEE max: -3 volts
● VCC max: +29 volts
● VEE min: -18 volts
● Warning: Absolute max between VCC and VEE is 32 volts.