user manual

Wiring the USB-9201/9221

The USB-9201/9221 provides connections for eight analog input channels.

The USB-9201/9221 with screw terminal has a 10-terminal, detachable

high voltage screw-terminal backshell. The USB-9201/9221 with DSUB

has a 25-pin DSUB connector.

Each channel has a terminal or pin, AI, to which you can connect a voltage

signal. The USB-9201/9221 also has a common terminal or pin, COM, that

is internally connected to the isolated ground reference of the module.

Refer to Table 2 for the terminal assignments of the USB-9201/9221 with

screw terminal. Refer to Figure 7 for the pin assignments of the

USB-9201/9221 with DSUB.

Caution The high voltage screw terminal backshell must be installed when using

hazardous voltages (>42.4 V

, 60 VDC).

Double-blink Connected to USB full speed port. Device

performance might be affected. Refer to the

Specifications section for more information.

Quadruple-blink Device error. Refer to ni.com/support.

Table 1. LED State/Device Status (Continued)

LED State Device Status