Iai-america RCS-C Manuel d'utilisateur Page 37

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2.6.4 External I/O Specifications
Input Part
Item Specification
Number of input points 8 points
Input voltage
24 VDC 20
Input current 7 mA per circuit
Operating voltage
ON voltage --- 16 V min. (4.5 mA)
OFF voltage --- 6 V max. (1.4 mA)
Isolation method Photocoupler
Internal circuit configuration (Standard NPN specification)
Connect a 24-V power supply between COMIA and COMIB.
Connect the input common to the negative side of the external power supply.
Pin Nos. 21 and 22 of COMIA and 23 and 24 of COMIB are connected internally.
Internal circuit configuration (Optional PNP specification)
Connect a 24-V power supply between COMIA and COMIB.
Connect the input common to the positive side of the external power supply.
Pin Nos. 21 and 22 of COMIA and 23 and 24 of COMIB are connected internally.
External
power supply
24 VDC
Pin No.
Rectifier
Each input
Internal circuit
External
power supply
24 VDC
Pin No.
Rectifier
Each input
Internal circuit
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