
3. External Connection
42
SMC-4DF-PCI, SMC-8DF-PCI
Limit input/general-purpose input/control input circuit(IN1 - IN7,
+LIM, -LIM, ORG)
The limit input/general-purpose input/control input circuit on this board is illustrated below.
The signal input is an current drive input by opto-coupler (Corresponding to the current sink output). To
drive the limit input/
general-purpose input/control input block, therefore, an external power supply is required
at +12 - +24 V.
Vcc
Vcc
Swich
External
Power Supply
+12 - +24VDC
Board
Photocoupler
Input
Pin
External
Device
Plus
Common
Photocoupler
Input
Pin
Swich
* Input pin is IN1 - IN7, +LIM, -LIM, ORG.
Figure 3.14. Limit input/general-purpose input/control input circuit
Commenti su questo manuale