IAI America SCON-C - Manual (Page 48)

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Each input
Each input
Internal
circuit
Internal
circuit
Each input
Each input
Logic
circuit
Logic
circuit
3.7 External Input/Output Specifications
The standard interface specification of the controller is NPN, but the PNP specification is also available as an
option.
To prevent confusion during wiring, the NPN and PNP specifications use the same power line configuration.
Accordingly, there is no need to reverse the power signal assignments for a PNP controller.
3.7.1 External Input Specifications
Item Specification
Number of input points 16 points
Input voltage 24 VDC
 10%
Input current 4 mA/point
ON voltage: Min. 18 VDC (3.5 mA) ON/OFF voltage
OFF voltage: Max. 6 VDC (1 mA)
Insulation method Photocoupler
Internal circuit configuration
[NPN specification]
[PNP specification]