B&B Electronics PCI-1711 - Manual - Manual (Page 34)

Chapter 3
– 26 – PCI-1710 series User’s Manual Advantech Co., Ltd.
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3.3 Analog Input Connections
The PCI-1710/1710L/1710HG/1710HGL/1716/1716L supports both 16-
channel Single-Ended or 8 differential A/D Input, however the PCI-
1711/1711L only 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 (V
m
) 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-1710/1710L/1710HG/
1710HGL/1711/1711L/1716/1716L 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-1710/1710L/1710HG/1710HGL/1711/1711L/1716/
1716L.
Figure 3-2: Single-ended input channel connection
Differential Channel Connections
The differential input channels operate with two signal wires for each
channel, and the voltage difference between both signal wires is
measured. On the PCI-1710/1710L/1710HG/1710HGL/1716/1716L, when
all channels are configured to differential input, up to 8 analog
channels are available.