High-speed Multifunction Boards
User Manual, Ver. 1.0, Jan 2020, PMH-032-10 Page 24
2.8.2
I/O Connector Signal Descriptions
Signal Name
Reference Direction
Description
AI<0..7>+
AI<0..7>-
Input
Analog Input channels 0 to 7.
For Differential
measurements, channels 0 to 3 are for load-cell
transducer inputs and channels 4 to 7 are for general
purpose analog inputs.
EXC+
EXC-
Output
Analog outputs for transducer voltage excitation, in
selectable ranges of 2.5V or 10V. Connect one
excitation source to only one load-cell transducer;
sharing a common wiring between transducers will
degrade gain accuracy. Up to four 120-ohm load-cells
can be connected to one PCIe-LM4. Load-cells with
larger impedance can also be used.
SENSE+
SENSE-
Input
Remote-sense analog inputs for transducer excitation
sensing. Always connect to EXCn+, SENSEn- to
EXCn-, and as close as possible to transducers
excitation terminals.
AGND
-
-
Analog Input/Output Ground.
These terminals are
reference point for AI measurements and AO<0..1>.
AO<0..1>
AGND
Output
Analog Output channels 0 to 1.
These terminals supply
the voltage output of AO channels 0 to 1.
DO<0..15>
EXT.GND
Output
Isolated Digital Output.
DI<0..15>
DGND
Input
Isolated Digital Inputs.
DI.COM<1..2>
D_GND
Input
Isolated Digital Ground
EXT.PWR<1..2>
EXT.GND
<1..2>
Input
Use in conjunction with DO<1..2> and external power
supply, to provide current return path for fly-wheel
diodes.
EXT.GND<1..2>
-
-
Isolated Digital Ground
