14-12 VersaMax® Modules, Power Supplies, and Carriers User's Manual – March 2003 GFK-1504K
14
IC200ALG630
Analog Input, 16 Bit Thermocouple, 7 Channels
Module Specifications
Module Characteristics
Channels Seven thermocouple or millivolt inputs
Module ID
Isolation:
User input to logic (optical) and to
frame ground
Group to group
Channel to channel
250VAC continuous; 1500VAC for 1 minute
Not applicable
None
LED indicators OK LED: green indicates backplane power is present.
Amber indicates module fault.
Backplane current consumption 5V output: 125mA maximum. 3.3V output: 125mA
maximum.
External power supply None
Thermal derating None
Diagnostics over/under range, open thermocouple, non-volatile
memory storage, high/low alarm, thermistor error
Input Characteristics
Thermocouple types J, K, T, S, R, none (used for mV inputs)
Spans (+/–) 19.5mV, 39mV, 78.125mV, 156.25mV, 312.5mV, 625mV
Converter resolution 15 bits + sign
Cold junction compensation If used, reference junction temperature is measured at
thermocouple termination using a precision thermistor, or
supplied by system, or by fixed configuration value.
Cold junction temperature error +/–0.25 degree Celsius (local measurement). To reduce
temperature transients, thermocouple terminations should
not be installed in the same cabinet as high
heat-dissipation assemblies.
Conformity error +/–0.3 degree Celsius, +/–0.5 degree Fahrenheit.
Accuracy, at 25° C
on voltage measurement:
on temperature measurement:
+/–0.2%
+/- 0.15%
Temperature sensitivity (0° to 60°C) +/–0.004% of reading, +/–1.5µV per °Celsius referred to
input
Normal mode rejection 60dB, at 50/60 Hz, 100% span
Common mode rejection 120 dB at 50/60Hz, 100 ohm imbalance
Common mode voltage 3 VDC maximum
Maximum voltage between channels 50V
Normal mode voltage 5 VDC maximum
Update rate 60 Hz: approximately 60 milliseconds per channel
50 Hz: approximately 70 milliseconds per channel
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