Analog Input Modules
Isolated Input Module IOP301
Metso Automation MAX Controls Inc. • 277596 •
2-5
FLASH
FPGA
I/O Bus
Regulator
24V
uC
OPTO
optical isolation
field to logic
DC/DC
A/D 1
REF
A/D 8
REF
Channel 1
Channel 2
Channel 15
Channel 16
DC/DC
OPTO
Optical isolation
between each pair
Multiplexer
Multiplexer
Diagnostics
The module executes diagnostics on power up. When an error is detected on
power-up or during online operation, the front-panel green LED, labeled
Active, blinks the first digit at a slower rate and the second digit at a faster
rate. During normal operation the active LED is on continuously or flashes at
a steady one-second rate when the module is not being scanned. The
diagnostic codes are as follows:
Error Condition Code
A/D send fault 0x12
A/D receive fault 0x13
A/D self calibration failure 0x14
Bad A/D communication 0x15
A/D does not complete conversion 0x16
RAM Test Failure (power-on) 0x22
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