Omega OM-USB-1208FS User Manual
OM-USB-1208FS User's Guide
Functional Details
13
Screw terminal
– pins 21-40
The screw terminals on the bottom edge of the (pins 21 to 40) provide the following connections:
16 digital I/O connections (
PortA0
to
Port A7
, and
Port B0
to
Port B7
)
One power connection (
PC+5 V
)
Three ground connections (
GND
)
Main connector and pin out
Connector type
Screw terminal
Wire gauge range
16 AWG to 30 AWG
8-channel single-ended mode pin out
4-channel differential mode pin out
Analog input terminals (CH0 IN - CH7 IN)
You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 (
CH0
IN
through
CH7
IN
.) Refer to the pinout diagrams above for the location of these pins.
You can configure the analog input channels as eight single-ended channels or four differential channels. When
configured for differential mode, each analog input has 12-bit resolution. When configured for single-ended
mode, each analog input has 11-bit resolution, due to restrictions imposed by the A/D converter.
configured for differential mode, each analog input has 12-bit resolution. When configured for single-ended
mode, each analog input has 11-bit resolution, due to restrictions imposed by the A/D converter.
Single-ended configuration
When all of the analog input channels are configured for single-ended input mode, eight analog channels are
available. The input signal is referenced to signal ground (GND), and delivered through two wires:
available. The input signal is referenced to signal ground (GND), and delivered through two wires:
The wire carrying the signal to be measured connects to CHn IN.
The second wire connects to AGND.
The second wire connects to AGND.
The input range for single-ended mode is ±10 V. No other ranges are supported in single-ended mode.