Rockwell-automation 1746-NR4 SLC 500 RTD/Resistance Input Module/ Inst Manual de usuario descargar pdf (Pagina 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)

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

Tim e

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 3000Ω resistance input). Refer to RTD

manufacturer for recommendations. Cannot use for 10Ω Copper RTD.

• 2.0 mA - Must use for 10Ω Copper RTD. 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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