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