Rockwell Automation 1746-NR4 SLC 500 RTD/Resistance Input Module/ Instructions - Manual (Page 20)

20 SLC 500™ RTD/Resistance Input Module
Publication 1746-IN012B-EN-P - May 2001
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; 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, 1746-6.7.
Channel Turn-On
Time Requires up to one module update time plus one of the following:
• 250 Hz Filter = 388 milliseconds
•
60 Hz Filter = 1,300 milliseconds
• 50 Hz Filter = 1,540 milliseconds
•
10 Hz Filter = 7,300 milliseconds
Channel Turn-Off
Time Requires up to one module update time.
Reconfiguration
Time Requires up to one module update time plus one of the following:
• 250 Hz Filter = 124 milliseconds
•
60 Hz Filter = 504 milliseconds
• 50 Hz Filter = 604 milliseconds
•
10 Hz Filter = 3,004 milliseconds
RTD Excitation
Current Two current values are user-selectable:
• 0.5 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. Cannot use for 10 Ω Copper RTD.
• 2.0 mA - Must use for 10 Ω Copper RTD. 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.