Delta RMC151 - Manual (Page 1183)

10 Wiring and Installation
Typical current = 24V / (480Ω + 25Ω) = 47.5mA
Typical current = 12V / (480Ω + 25Ω) = 23.7mA
UI/O Discrete Inputs
The UI/O points configured as inputs use the Input Common and are compatible with
signal levels ranging from 12V to 24V. Each input draws a maximum of 2.6mA with a
12V or 24V input. Most PLC outputs can be connected to the UI/O inputs directly.
Because the I/O points share a single common, the inputs must all be connected to the
same type of output (sinking or sourcing). If your application has various types of
outputs, see figure 9 to convert a sinking output to a sourcing output.
Wiring Diagrams
The following are some input wiring diagrams:
Figure 4: Direct connection to the input.
Figure 5: Direct connection to Programmable
Controller.
Figure 6: Relay Connection from
Programmable Controller.
Using UI/O Inputs with Open Collector Outputs
The UI/O's discrete inputs can be used with open collector (sinking) outputs. There are
three configurations that can be used to drive the UI/O inputs from an open-collector
output:
Figure 7: PNP Configuration: This configuration is the most popular for open collector
PNP outputs.
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