ControlLogix™ Sourcing Current Loop Input Module
17
Publication
1756-IN579A-EN-P - March 2003
1756-IF6CIS Specifications
Number of Inputs
6 points isolated
Module Location
ControlLogix Chassis
Backplane Current
250 mA @ 5.1V dc & 275 mA @ 24V dc
Backplane Power
7.9 Watts
Max. Module Power Dissipation
5.1 Watts @ 60° C
Thermal Dissipation
17.4 BTU/hr
Input Range
0-21mA (Over-range indication when exceeded)
Resolution 0-21mA
0.34
m
A/bit 16bit (15.9bits)
Data Format
Integer Mode (Left justified, 2's complement)
Floating point IEEE32 bit
Input Impedance
Approximately 215 ohm
Sourcing Voltage
20V dc minimum
30V dc maximum
Sourcing Current
Current limited to <30mA maximum
Open Circuit Detection Time
Zero reading within 5 seconds
Overvoltage Protection
30V AC/DC with PTC and Sense Resistor
Normal Mode Noise Rejection
(1)
60dB at 60Hz
Common Mode Noise Rejection
120dB at 60Hz, 100 dB at 50Hz
Channel Bandwidth
(1)
3-262Hz (-3dB)
Settling Time to % of Full Scale
(1)
5% of FS: <80 milliseconds
Calibrated Accuracy Worst Case
Better than 0.1% of range @25°C
Calibrated Accuracy Typical
0.025% of full range @25°C
Calibration Interval
1 year
Input offset drift with temperature 200nA/°C typical
Gain Drift with Temperature
40 ppm/°C typical
70 ppm/°C maximum)
Module Error over Full Temp Range 0.4% of Range
Module Scan Time for all Channels
(Sample Rate)
25 milliseconds minimum floating point
10 milliseconds minimum integer
Allen-Bradley Drives