National Instruments NI 6232 - Manual (Page 122)

© National Instruments Corporation 9-1 NI 6232/6233 User Manual
9
Isolation and Digital Isolators
NI 6232/6233 devices are isolated data acquisition devices. As shown in
Figure 9-1, the analog input, analog output, counters, and PFI/static DIO
circuitry are referenced to an isolated ground. The bus interface circuitry,
RTSI, digital routing, and clock generation are all referenced to a
non-isolated ground. Refer to Table 9-1 for an example of the symbols for
isolated ground and non-isolated ground.
Figure 9-1. General NI 6232/6233 Block Diagram
Table 9-1. Ground Symbols
Isolated Ground Non-Isolated Ground
P1.GND
P1
Analog Output
Analog Input
PFI/Static DI
PFI/Static DO
Digital
Routing
and Clock
Generation
Bus
Interface
I/O Connector
RTSI
Digital
Isolators
Isolation
Barrier
Bus
Counters
P0.GND
AO GND
AI GND
P0
A
A
A