3. External Connection
AI-1216B-RB1-PCI, AI-1216B-RU1-PCI
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Analog Input Signal Connection
Analog signal input types are divided into single-ended input and differential input. This board uses
single-ended input fixed. The following examples show how to connect analog input signals using a flat
cable and a shielded cable.
Single-ended Input
The following figure shows an example of flat cable connection.
Connect separate signal and ground wires for each analog input channel on CN1.
Analog Input 0..15
Analog Ground
BOARD
CN1
Cable
Signal Source
Figure 3.3. Single-ended Input Connection (Flat Cable)
The following figure shows an example of shield cable connection. Use shielded cable if the distance
between the signal source and board is long or if you want to provide better protection from noise. For
each analog input channel on CN1, connect the core wire to the signal line and connect the shielding to
ground.
Analog Ground
Shield cable
Analog Input 0..15
BOARD
CN1
Signal Source
Figure 3.4. Single-ended Input Connection (Shield Cable)
CAUTION
-
If the signal source contains over 50 kHz signals, the signal may effect the cross-talk noise between
channels.
-
If the board and the signal source receive noise or the distance between the board and the signal
source is too long, data may not be input properly.
-
An input analog signal should not exceed the maximum input voltage (relate to the board analog
ground). If it exceeds the maximum voltage, the board may be damaged.
-
Connect all the unused analog input channels to analog ground.
