Rockwell-automation 1771-IFE , D17716.5.90 USER MNL. ANALOG INPUT Modu Instrukcja Użytkownika Pobierz pdf (Strona 47)

Appendix

A-1

Specifications

Inputs per module 16 single-ended; 8 differential low level

Module Location 1771 I/O rack - 1 slot

Input voltage ranges (nominal)

+1 to +5V dc

0 to 5V dc

-5 to +5V dc

-10 to +10V dc

0 to +10V dc

Input current ranges (nominal)

+4 to +20mA

0 to +20mA

-20 to +20mA

Resolution 12-bit binary

12 bits plus sign on bipolar ranges

Accuracy 0.1% of full scale range @ 25

Linearity +1 LSB

Repeatability +1 LSB

Isolation Voltage +1500V, (transient)

Input overvoltage protection

200V (voltage mode)

8V (current mode)

Input overcurrent protection (current ranges) 30mA

Common mode voltage +14.25 Volts

Input impedance 100 Megohms for voltage ranges; 250 ohms for current ranges

Common mode rejection 80 db, DC-120 Hz

Current Requirements 0.75A @ +5V from I/O chassis backplane

Power Dissipation 3.75 Watts (maximum)

Thermal Dissipation 12.8 BTU/hr (maximum)

Unscaled BCD and binary output to

processor

0000 to +4095

for polar ranges (0 to 5V, +1 to +5V, 0 to +20mA,

and +4 to +20mA)

-4095

to 4095

for bipolar ranges ( +5V, +10V, +20mA)

Engineering units sent to processor +9999

with selectable scaling

Internal scan rate

12.5 ms for 8 differential inputs (no digital filtering) -add 2.12ms for filtering

25 ms for 16 single-ended input (no digital filtering) -add 4.24 for filtering

Environmental conditions

operational temperature:

storage temperature:

relative humidity:

0 to 60

C (32 to 140

-40 to 85

C (-40 to 185

5 to 95% (without condensation)

Conductors Wiring

Category

14 gauge stranded (max.)

3/64 inch insulation (max.)

Category 2

Keying

between 10 and 12

between 24 and 26

Wiring Arm Catalog Number 1771-WG

Field Wiring Arm Screw Torque 79 inchpounds

The inputs are protected to 200V

. However

, if an input terminal'

s voltage exceeds +

14.25V as referenced to module common, channeltochannel crosstalk

can cause invalid input readings and invalid underrange/overrange bits.

Only 8 volts can be placed directly across the input when configured in the current mode.

Refer to publication 1770-4.1, "Programmable Controller Wiring and Grounding Guidelines."

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