Measurement Computing E-1608 - Manual (Page 13)

E-1608 User's Guide Functional Details
13
The E-1608 pinout locations are shown in Figure 3 below.
Figure 3. E-1608 pinout
Signal connections
Analog input
You can configure the analog inputs for SE or DIFF mode. The input voltage range is software selectable for
±10 V, ±5 V, ±2 V, or ±1 V.
With SE mode, connect up to eight inputs to CH0x to CH3x . SE mode requires two wires:
 Connect one wire to the signal you want to measure (
CH#x ).
 Connect one wire to the analog ground reference (
AGND ).
With DIFF mode, connect up to four differential inputs to CH0H/CH0L to CH3H/CH3L . DIFF mode requires
two wires plus a ground reference:
 Connect one wire to the high/positive signal (
CHxH ).
 Connect one wire to the low/negative signal (
CHxL ).
 Connect one wire to the analog ground reference (
AGND ).
Floating voltage source
When connecting DIFF voltage inputs to a floating voltage source, make sure the DIFF input channel has a DC
return path to ground. To create this path, connect a resistor from each low channel input to an AGND pin. A
value of approximately 100 kΩ can be used for most applications.