Contec AO-1604CI2-PCI, Руководство пользователя

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3. External Connection
38
AO-1604CI2-PCI
Connecting example of current output
The figure below shows an example connection using a flat cable as the optional one (PCA37P).
The load register is connected. Please adjust the register load R
L
connected with the current output of
each channel to 500
Ω
or less including the resistance of wiring.
Each current output of CN1 and analog ground is connected to the resister load R
L.
Current Output 0...3
Analog Ground 0...3
Target BOARD Cable CN1
Register load R
L
Figure 3.5. Current output connection (Flat cable)
The following figure shows an example of shielded cable connection. Use shielded cable if the
distance between the loading and board is long or if you want to provide better protection from noise.
Connect the each current output of CN1 to the register load in the core wire of shielded cable and
connect the each analog ground of CN1 to the register load in the shielding of shielded cable.
CN1
Target Coaxial cable
Analog Ground 0...3
Current Output 0...3
BOARD
Register load R
L
Figure 3.6. Current output connection (Shielded cable)
CAUTION
- When the power supply is turned on, output (0mA) of data 0000h is output as for the output signal.
- Do not short circuit any of the output signals to analog ground. Doing either can cause a
malfunction.
- Do not connect the output signal to that of other channel and of external device. Doing either can
cause a malfunction.
- Do not detach the interface connector (CN1) with the power supply of a PC or an external device
turned on. Doing either can cause a malfunction.
- If the connection cable is affected by noise, it may fail to output the accurate current data.
Route the connection cable as far apart from noise sources as possible.