18 ControlLogix High Speed Analog I/O Module
Publication
1756-IN004A-EN-P - February 2002
Input Specifications
Number of Inputs 4 differential inputs
Input Range Selections +/- 10.5V, 0-10.5V, 0-5.25V, 0-21ma
overrange indication when exceeded
Voltage Resolution
+/- 10.5V range
0-10.5V range
0-5.25V range
Approximately 14 bits across +/-10.5V dc (21V total)
1.3mV/bit - 14-bit effective
1.3mV/bit - 13-bit effective
1.3mV/bit - 12-bit effective
Current Resolution
0-21ma range
Approximately 12 bits across 21mA
5.25
µA/bit
Repeatability
+
1 Least Significant Bit (LSB)
(4)
Input Impedance >1MΩ - voltage
249
Ω - current
Open Circuit Detection Time Positive full scale reading within 1 second
Overvoltage Protection 30V dc - when wired for voltage operation
8V ac/dc - when wired for current operation
Common Mode Noise Rejection 70dB typical, 50/60 Hz
Accuracy at 25°C 0.05% of range immediately after calibration
Better than 0.1% of range within calibration interval
Calibration Interval 12 months typical
Gain Drift with Temperature 25 ppm/degree C maximum - voltage
35 ppm/degree C maximum - current
Input Error over Full Temp. Range 0.2% of range
Minimum Scan Time for all
Channels (Sample Rate)
400
µS
Input Conversion Method Successive approximation
Output Specifications
Number of Outputs 2 voltage or current outputs
Output Range 0 - 21mA
+/-10.4V
Resolution 13 bits across 21mA = 2.8
µA/bit
14 bits across 20.8V = 1.3mV/bit
Open Circuit Detection Current output only (Output must be set to >0.1mA)
Output Overvoltage Protection 24Vdc
Output Short Circuit Protection Electronically current limited to 21mA or less
Drive Capability >2000
Ω - voltage
0-750
Ω - current
Output Settling Time <2mS to 95% of final value with resistive loads
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