3. External Connection
AD12-64(PCI), AD12-16(PCI)
45
Connection Example of Differential Input
The following figure shows an example of flat cable connection.
For each analog input channel on CN1, connect the "+" input to the signal and connect the "-" input to
the signal source ground. Also connect the analog ground on this product to the signal source ground.
Figure 3.9. Connecting the Differential Input (Flat Cable)
The following example connects a signal source to this product using a shielded cable. Use shielded
cable if the distance between the signal source and this product is long or if you want to provide better
protection from noise. For each analog input channel on CN1, connect the "+" input to the signal and
connect the "-" input to the signal source ground. Also connect the analog ground on this product and
the signal source ground to the shielding.
Figure 3.10. Connecting the Differential Input (Shield Cable)
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If the signal source contains over 1MHz signals, the signal may effect the cross-talk noise between
channels.
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When the analog ground is not connected, input data comes to be undetermined.
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If this product and the signal source receive noise or the distance between this product and the
signal source is too long, data may not be input properly.
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An input analog signal to both [+] and [-] input should not exceed the maximum input voltage
(relate to analog ground of this product). If it exceeds the maximum voltage, this product may be
damaged.
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Connect all the unused analog [+] and [-] input channels to analog ground.
Analog Input 0[+]..31[+] *
Analog Ground
BOARD
Cable
Signal Source
Analog Input 0[-]..31[-] *
CN1
* 0[+] to 7[+] and 0[-] to 7[-] for AD12-16(PCI), respectively.
Analog Input 0[+]..31[+] *
Analog Ground
BOARD
Signal Source
Analog Input 0[-]..31[-] *
CN1
Shield cable
* 0[+] to 7[+] and 0[-] to 7[-] for AD12-16(PCI), respectively.
CAUTION
