maxPAC Hardware Reference Guide
Metso Automation MAX Controls Inc. • 277596 •
5-4
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
CPU Stack Error (power-on) 0x23
CPU Error (power-on) 0x24
Checksum Error (power-on) 0x25
Interrupt Error (power-on) 0x26
FPGA Download Error (power-on) 0x32
Module Specifications
Resolution 15 bits plus sign
Scan Rate 16 points converted in 1 seconds
Temperature Sensitivity ±0.004% of reading/
o
C ±1.5uv/
o
C RTI
Accuracy ±0.15% of reading ±0.05
o
C
Input Multiplexer Solid-state FET, optical isolation
Conversion method Sigma Delta oversampling
Linearization Digital in DPU. RTD ranges may be
randomly mixed.
Calibration Self-calibration on power up. Periodically
on line to compensate for temperature
effects
RJ Compensation Digital in module
Open TC Detection Performed each reading (1,000 0hm
threshold)
Backup Conversions disabled if common TC is
connected to redundant modules
Conformity Error ±0.3
o
C, ±0.5
o
F
Reference Junction Error ±0.25
o
C
Normal Mode Rejection 60db @ 50/60 Hz
Common Mode Rejection 120db @ 50/60 Hz, 100 Ohm imbalance
Common Mode Voltage 240V rms, 350V dc peak
Input Power
(from 24V system supply)
125 mA
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