Instrument Controls, Indicators, And Connections; Connecting The Di-710 To Ground - Dataq DI-710 Series User Manual

4. Instrument Controls,
Indicators, and Connections

Connecting the DI-710 to Ground

The ground connection on the I/O terminal strip should always be connected to a signal ground, if one is not inher-
ently made through analog or digital signal connections. Without this connection, the front end of the DI-710 does not
have a return path which could lead to inaccurate measurements. Under no circumstances should the DI-710 be used
in a measurement situation where it will experience common mode voltages in excess of ±30 VDC or peak AC (the
device's full-scale range without damage).
The ground lug at the rear of the DI-710 should always be connected to a solid chassis or earth ground. This connec-
tion is mandatory for the unit to meet CE guidelines.
Analog Inputs
Digital I/O
Analog Ground
Connection
To signal ground
(if not inherently
made through
analog or digital
connections).
! IMPORTANT !
DATA
DI-710
Front End
POWER
SD Memory
Card
Two Critical DI-710 Ground Connections

Instrument Controls, Indicators, and Connections

21
DI–710 Series and DI-715B Series Hardware Manual
I
DATA
S
O
L
Interface
A
USB/Ethernet
T
I
O
POWER
N
Rear Panel
Ground Lug
Solid Chassis or
Earth Ground
Connection