4 Startup Manual
Analog Input Connections
The PCI-1712/1712L supports either 16 single-ended or
8 differential analog inputs. Each individual input
channel is software-selected.
Single-ended Channel Connections
The single-ended input configuration has only one sig-
nal wire for each channel, and the measured voltage
(Vm) is the voltage of the wire as referenced against the
common ground.
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-
1712/1712L, when all channels are configured to differ-
ential input, up to 8 analog channels are available.
Figure 1: Differential input channel connection -
ground
reference signal source
Figure 2: Differential input channel connection -
floating
signal source
Analog Output Connections
The PCI-1712/1712L provides two D/A output chan-
nels,
AO0_OUT
and
AO1_OUT
. Users may use the
PCI-1712 internally-provided pre5V (+10V)
reference to generate 0 ~ +5 V and 0 ~ +10 V unipolar
D/A output range; or to generate -5 ~ +5 V and -10 ~
+10 V for bipolar output range.
Users also may create D/A output range through exter-
nal references,
AO0_REF
and
AO1_REF
. The external
reference input range is 0 ~10 V. For example, connect-
ing with an external reference of +7 V will generate 0 ~
+7 V D/A output for unipolar; and -7 ~ +7 V for bipo-
lar.
Connections
+
+
_
_
I/O Connector
External Reference
For DA
Signal 0
External Reference
For DA
Signal 1
External
AO0
AO1
Load
Load
AO0_REF
AO1_REF
AO1_OUT
AO0_OUT
AOGND
INT_REF
INT_REF
DATA BUS
+5V
+10V
Internal
