Rockwell-automation 1746-NR8 SLC 500 RTD/Resistance Input Module/ Inst Manual de usuario descargar pdf (Pagina 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)

1Ω or 0.1Ω for all resistance ranges except for 150Ω; or 0.1Ω or 0.01Ω for 150Ω

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 (1000Ω RTDs and 3000Ω resistance input). Refer to RTD manufacturer for

recommendations.

1.0 mA -Recommended to use for all other RTD and direct resistance inputs, except 1000Ω

RTDs and 3000Ω resistance input ranges are limited. Refer to RTD manufacturer for

recommendations.

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