Hardware Overview; Connecting The Ni Usb-7855R - National Instruments NI USB-7855R User Manual

Furthermore, any changes or modifications to the product not expressly approved by National
Instruments could void your authority to operate it under your local regulatory rules.
Caution To ensure the specified EMC performance, operate this product only with
shielded cables and accessories.
Caution To ensure the specified EMC performance, you must install the included
snap-on ferrite bead onto the DC power cord of the power supply as described in the
getting started guide.

Hardware Overview

The following high-level block diagram represents the NI USB-7855R.
Overvoltage
Protection
Overvoltage
Protection
Overvoltage
Protection
Overvoltage
Protection

Connecting the NI USB-7855R

The NI USB-7855R provides connections for eight analog input (AI) channels, eight analog
output (AO) channels, and forty-eight digital input/output (DIO) channels, as shown in Figure
2.
2 | NI USB-7855R User Manual | ni.com
Figure 1. NI USB-7855R Block Diagram
DIO (x32)
DIO (x16)
AI (x8)
ADC
INA
+5 V
Reference
AO (x8)
DAC
Device
Temperature
40 MHz
OSC
DIO
Kintex-7
AI
Data/
FPGA
Address/
Control
FPGA
Temperature
AO
Flash
Memory
NI ASIC
NI USB-7855R
USB