Rockwell-automation 1771-IR INSTL.INSTR RTD INPUT MODULE Uživatelský manuál stáhnout pdf (Strana 11)

RTD Input Module 11

Publication

1771-5.50 – October 1996

Description Value

Number of Inputs 6 RTD input channels

Module Location 1771 I/O Chassis

Sensor Type 100 ohm platinum (alpha = 0.00385) or 10 ohm copper

(alpha = 0.00386)

Other types may be used with report in ohms only

Units of measure Temperature in

Temperature in

RTD resistance in ohms (10milliohms or 30milliohms

resolution)

Temperature Range Platinum: –200 to +870

C (–328 to 1598

Copper: –200 to +260

C (–328 to +500

Resistance Range 1.00 to 600.00 ohms

Resolution Platinum: 0.1

C (0.1

Copper: 0.3

C (0.5

Sensor Excitation 1mA constant current source supplied by module

Common Mode Rejection 120db @ 60Hz up to 1000V peak

Common Mode Impedance Greater than 10 megohms

Normal Mode Rejection 60db @ 60Hz

Input Overvoltage Protection 120V rms continuous

Open RTD Response Time Open excitation (terminal A) to overrange: <0.5sec

Open common (terminal C) to underrange: <0.5sec

Open sense (terminal B): drift high

Scan Time 50ms for 6 channels

Isolation Voltage This isolation meets or exceeds the requirements of UL

Standard 508, and CSA Standard C22.2 No. 142.

Backplane Current 950mA at 5V

Power Dissipation 4.75W maximum

Thermal Dissipation 16.2 BTU/hr

Environmental Conditions

Operating Temperature:

Rate of Change:

Storage Temperature:

Relative Humidity: Operating

Storage

0 to 60

C (32 to 140

Ambient changes greater than 1.0

C/minute may temporarily

degrade performance during periods of change.

–40 to 85

C (–40 to 185

5 to 95% noncondensing

Keying Between 10 and 12

Between 28 and 30

Field Wiring Arm Cat. No. 1771-WF

Wiring Arm Screw Torque 7-9 inch-pounds

Specifications continued on next page

Specifications

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