Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD/mV Input Module User Manual - Manual (Page 22)

Publication 1797-6.5.2 - February 2001
2-8 Understanding Configurable FLEX Ex Thermocouple/RTD/mV Input Module Features
Underrange Alarm
The channel underrange alarm is set if the input is less than the
minimum temperature (thermocouple or RTD range dependent),
millivolt (-40mV) or resistance (0
Ω
) range value.
Range: 0 = normal, 1 = input overrange. Default = 0.
This alarm stays active at any value below 0% of range and is always
enabled by the module.
Range: 0 = normal, 1 = input overrange. Default = 0.
normal signal range overrange
CJC fault
underrange
-200C +870C IEC PT100 ~ 520ohm equivalent
PHYSICAL INPUT SIGNAL RANGE
Sensor Type
-200C +400C IEC PT200
-200C +630C JIS PT100
-200C +400C JIS PT200
-60C +250C DIN Ni100
-60C +200C DIN Ni200
-80C +320C Minco Ni120
-200C +260C Minco Cu10
0ohm 500ohm 0-500 Resistance
-40mV +100mV millivolt ~ 210mV
300C +1800C B
-250C +1000C E
-210C +1200C J
-250C +1372C K
-200C +800C TXK/XK(L)
-250C +1300C N
0C +1768C R
0C +1768C S
-250C +400C T
Channel
Data
Forced
to
Maximum
for Type
-20C 100C Cold Junction Compensation
CJC fault
open wire fault
~ 520ohm equivalent
~ 520ohm equivalent
~ 520ohm equivalent
~ 520ohm equivalent
~ 520ohm equivalent
~ 520ohm equivalent
~ 520ohm equivalent
~ 520ohm
~ 210mV equivalent
~ 210mV equivalent
~ 210mV equivalent
~ 210mV equivalent
~ 210mV equivalent
~ 210mV equivalent
~ 210mV equivalent
~ 210mV equivalent
~ 210mV equivalent
IRT8 Specific alarming performance