S600+ Instruction Manual 
4-6  I/O  Revised July-2017 
 
Figure 4-7. Analogue Output Schematic (Externally Powered Device)  
 
Figure 4-8. Analogue Output Schematic (Externally Powered through S600+)  
Table 4-3. D/A Converter Output Pin Connections for SKT-A 
4.1.3  Digital Inputs (DIGIN) 
Each plug-in module provides 16 optically isolated digital inputs 
(DIGIN). The digital inputs have been grouped into four banks of 4-off 
single-ended inputs with one common feed. Refer to Figures 4-9 and 
4-10. 
The sample period is less than 1 second.  
The DIGIN channels use the connectors labeled SKT-B and SKT-C, 
which are located on the backplate of the I/O module. Refer to Tables 
4-4 and 4-5 for the DIGIN pin connections.