Rockwell Automation 1746-NT4 Series B,D17466.6.1 SLC 500 4-Channel Thermocouple/mV Input Module User Manual - Manual (Page 99)

Publication 1746-UM007C-EN-P - July 2004
Specifications A-3
Input Specifications
Specification Value
Type of Input (Selectable) Thermocouple Type J -210°C to 760°C (-346°F to 1400°F)
Thermocouple Type K -270°C to 1370°C (-454°F to 2498°F)
Thermocouple Type T -270°C to 400°C (-454°F to 752°F)
Thermocouple Type E -270°C to 1000°C (-454°F to 1832°F)
Thermocouple Type R 0°C to 1768°C (32°F to 3214°F)
Thermocouple Type S 0°C to 1768°C (32°F to 3214°F)
Thermocouple Type B 300°C to 1820°C (572°F to 3308°F)
Thermocouple Type N (14 AWG) 0°C to 1300°C (32°F to 2372°F)
Millivolt (-50 mV dc to +50 mV dc)
Millivolt (-100 mV dc to +100 mV dc)
Thermocouple Linearization IPTS-68 standard, NBS MN-125, NBS MN-161
Cold Junction Compensation Accuracy ±1.5°C, 0°C to 85°C (32°F to 185°F)
Input Impedance Greater than 10MW
Temperature Scale (Selectable) °C or °F and 0.1°C or 0.1°F
DC Millivolt Scale (Selectable) 0.1 mV or 0.01 mV
Open Circuit Detection
Leakage Current 12 nA maximum
Open Circuit Detection Method Upscale
Time to Detect Open Circuit 500 msec or 1 module update time, whichever is greater
Input Step Response See Channel Step Response, page 4–6.
Input Resolution See Input Resolution Graphs on following pages. The graphs show the
smallest measurable unit based on the combined hardware and software
tolerances.
Display Resolution See Channel Data Word, page 5-12.
Overall Module Accuracy
@ 25°C (77°F) See 1746-NT4 Module Accuracy, page A-4
Overall Module Accuracy
(0°C to 60°C, 32°F to 140°F) See 1746-NT4 Module Accuracy, page A-4
Overall Module Drift See 1746-NT4 Module Accuracy, page A-4
Module Update Time See Update Time, page 4-7
Channel Turn-On Time,
Reconfiguration Time Requires up to one module update time plus one of the following:
50 Hz Filter= 82 milliseconds
60 Hz Filter= 196 milliseconds
50 Hz Filter= 226 milliseconds
10 Hz Filter= 946 milliseconds
Channel Turn-Off Time Requires up to one module update time (refer to page 4–7)