Omron PRT1-COM Operation Manual page 117

Analog Input Units
Internal Circuits
I/O Unit
interface
24 VDC
Internal
+
power
supply
24 VDC
--
Terminal Arrangement
Wiring
Internal Power Supply
Internal power supply
Input Ranges and
Converted Data
Photocoupler
I/O Unit
interface
Insulating DC
Internal
to DC
circuits
converter
Voltage Input
0 V
The Analog Input Unit converts analog input data to digital values. The digital
values depend on the input signal ranges, as shown in the following diagrams.
When the input exceeds the specified range, the AD conversion data will be
fixed at either the lower limit or upper limit.
Photocoupler
I/O Unit
interface
Input circuit
V+
510 kΩ
I+
250 Ω
--
510 kΩ
8 circuits
Current Input
0 V
(For current input, short the V+
terminal and the V-- terminal.)
Section 7-1
107