Rockwell-automation 1771-IL INSTL.INSTR.ISOL ANALOG INPUT Manual de usuario descargar pdf (Pagina 13)

Isolated Analog Input Module 13

Publication 1771Ć5.51 - October 1996

 

Number of Inputs 8 fully isolated differential

Module Location 1771 I/O rack Ć 1 slot

Input voltage ranges (nominal) +1 to +5V DC

0to5VDC

Ć5 to +5V DC

Ć10 to +10V DC

Input current ranges (nominal) +4 to +20mA

0 to +20mA

Ć20 to +20mA

Resolution 16Ćbit binary over full range

Accuracy Voltage

Current

Typical Ć 0.01% of full scale range @ 25

Maximum Ć 0.05% of full scale range @ 25

Typical Ć 0.06% of full scale range @ 25

Maximum Ć 0.1% of full scale range @ 25

(Includes 0.05% when using internal current resistor)

Linearity +1 LSB

Repeatability +1 LSB

Isolation Voltage This isolation meets or exceeds the requirements of UL

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

Input overvoltage protection voltage mode: 140V ac (rms) continuous;

current mode: 8V dc continuous

Unscaled BCD and binary output

data to the processor

0000 to +4095

for unipolar ranges

(0 to 5V, +1 to +5V, 0 to +20mA, and +4 to +20mA)

Ć4095

to 4095

for bipolar ranges

5V, +10V, +20mA input ranges

Input impedance >10 megohms for voltage ranges; 250 ohms for current

ranges

Common mode rejection >120 db @ 60Hz and 1K ohm source imbalance

Common mode impedence >50 megohms shunted by <5 nF

Normal mode rejection >60 db @ 60Hz

Open Circuit Detection Voltage mode

Current mode

Open input produces upscale reading.

Open input produces zero reading.

Time to Detect Open Circuit 10s maximum

Calibration AutoĆcalibration (offset and gain)

Zero offset and gain adjustment for each channel via

programming terminal

Verify every six months to maintain specified accuracy

Engineering units sent to

processor

+9999 BCD with selectable scaling

32767 binary

Internal scan rate 50ms for 8 channels

Backplane Current 1.1A @ +5V

Power Dissipation 5.5 Watts maximum

Thermal Dissipation 18.8 BTU/hr maximum

Conductors Wiring

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Rockwell-automation 1771-IL INSTL.INSTR.ISOL ANALOG INPUT Manual de usuario Pagina 13

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