3-1
Section
Analog I/O Units
188
Once the range code has been set, it is not possible to change the setting while
power is being supplied to the CPU Unit. To change the I/O range, turn the CPU
Unit OFF then ON again.
Wiring Analog I/O Devices
CPM1A-MAD11 Internal Circuits
Analog Inputs
Analog Outputs
Analog ground
Input 0
Input 1
Analog ground
Output
Internal circuits
510 k
Ω
510 k
Ω
510 k
Ω
510 k
Ω
250
Ω
250
Ω
COM 0 (–)
V IN –
V IN 1
COM 1 (–)
Internal circuits
COM (–)
V OUT
I OUT
AG
NC
NC
I IN 0
I IN 1
CPM1A-MAD11 Terminal Arrangements
I OUT
V OUT COM
NC
NC
I IN0
V IN0 COM1
NC
NC
I IN1
V IN0
COM0
AG
Label
Signal
V OUT
Voltage output
I OUT
Current output
COM
Output common
V IN0
Voltage input 0
I IN0
Current input 0
COM0
Input common 0
V IN1
Voltage input 1
I IN1
Current input 1
COM1
Input common 1
Note
For current inputs, short V IN0 to I IN0 and V IN1 to I IN1
Wiring for Analog Inputs
Analog device
with voltage
output
Analog
I/O
Unit
Analog device
with current
output
Analog
I/O
Unit
+
–
V IN
I IN
COM
+
–
V IN
I IN
COM