Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module/ Instructions - Manual (Page 18)

18 SLC 500™ RTD/Resistance Input Module
Publication 1746-IN007C-EN-P - December 2002
Input Specifications
RTD Types platinum, nickel, nickel iron, copper
(For additional information on RTD types, see page 21.)
Temperature
Scale (Selectable) °C or °F and 0.1°C or 0.1°F
Resistance Scale
(Selectable) 1
Ω
or 0.1
Ω
for all resistance ranges except for 150
Ω;
or 0.1
Ω
or 0.01
Ω
for 150
Ω
potentiometer.
Input Step
Response Refer to the SLC 500™ RTD/Resistance Input Module User Manual, publication number
1747-UM003A.
Channel Turn-On
Time Requires up to one module update time plus module calibration time.
Channel Turn-Off
Time Requires up to one module update time.
Reconfiguration
Time Requires up to one module update time plus module calibration time.
Channel Scan
Time (with lead
resistance) 28 Hz = 250 ms
50/60 Hz = 147 ms
800 Hz = 18 ms
6400 Hz = 10 ms
Channel Scan
Time (without lead
resistance) 28 Hz = 125 ms
50/60 Hz = 75 ms
800 Hz = 10 ms
6400 Hz = 6 ms
RTD Excitation
Current RTD setting:
0.25 mA - Recommended for use with higher resistance ranges for both RTDs and direct
resistance inputs (1000
Ω
RTDs and 3000
Ω
resistance input). Refer to RTD manufacturer for
recommendations.
1.0 mA -Recommended to use for all other RTD and direct resistance inputs, except 1000 Ω
RTDs and 3000 Ω resistance input ranges are limited. Refer to RTD manufacturer for
recommendations.