Measurement Computing USB-234, Руководство пользователя, Страница: 11 / 29

USB-234 User's Guide Functional Details
11
External components
The external components on the USB-234 are shown in Figure 3.
1 Screw terminal pins 1 to 16 3 LED Indicator
2 Screw terminal pins 17 to 32 4 USB connector
Figure 3. USB-234 external components
Screw terminals
The screw terminals provide the following connections (refer to Figure 4 and Figure 5 for pinout diagrams):

Eight single-ended/four differential analog inputs (
CH0H/CH0L
to
CH3H/CH3L
)

Two analog outputs (
AOUT0
and
AOUT1
)

Digital trigger input ( TRIG
)

Counter input ( CTR )

User voltage output
(+VO
)

Analog ground reference (
AGND
) and digital ground reference (
GND
)
Caution!
To ensure the specified EMC performance, the length of any wire or cable connected to the screw
terminal connector must be no longer than 0.5 m (20 in.).