Chapter 3
– 22 –
PCI-1711/1731 User’s Manual
Advantech Co., Ltd.
www.advantech.com
3.3 Analog Input Connections
The PCI-1711/1731 supports 16 single-ended analog inputs. Each
individual input channel is software-selected.
Single-ended Channel Connections
The single-ended input configuration has only one signal wire for each
channel, and the measured voltage (Vm) is the voltage of the wire as
referenced against the common ground.
A signal source without a local ground is also called a “floating
source”. It is fairly simple to connect a single-ended channel to a
floating signal source. In this mode, the PCI-1711/1731 provides a
reference ground for external floating signal sources.
Figure 3-2 shows a single-ended channel connection between a
floating signal source and an input channel on the PCI-1711/1731.
Fig. 3-2 Single-ended input channel connection
3.4 Analog Output Connections
The PCI-1711 provides two D/A output channels (PCI-1731 is not
designed to have this function), DA0_OUT and DA1_OUT. Users
may use the PCI-1711 internally-provided precision –5V (-10V)
reference to generate 0 to +5 V (+10 V) D/A output range. Users also
may create D/A output range through external references, DA0_REF
and DA1_REF. The maximum reference input range is +/-10 V. For
example, connecting with an external reference of -7 V will generate 0 to
External
Internal
