Rockwell Automation 1790-TXXXX CompactBlock LDX I/O Profibus Analog, RTD and Thermocouple - Manual (Page 24)

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Publication 1790-IN010B-EN-P - April 2003
4-Channel Analog Current Input Block Specifications
1790P-TN4C0
Inputs per module 4 channel single-ended, non-isolated
Input Current
(software configurable) 4-20mA (default)
0-20mA
Resolution 12 bits-unipolar
1/4096 maximum
3.90
µA/bit (4-20mA)
4.88 µA/bit (0-20mA)
Converted Data Binary data
0000 to 0fff (max scale)
Conversion Time 10ms/channel
Overall accuracy 0.2% Full scale @0°-55°C
Calibration None required
Input Impedance 249 Ω
Insulation Resistance 20M Ω minimum @ 250V dc (between insulated
circuits)
General Specifications
PROFIBUS Power Supply voltage - 24V dc nominal
Voltage range - 19.2-28.8V dc
Power dissipation - 1.2W maximum @ 28.8V dc
Field Power Supply Voltage - 24Vdc nominal
Voltage Range - 21.6-26.4V dc (+10%)
Power Dissipation - 1.5W maximum @26.4V dc
Isolation I/O to logic: photocoupler isolation
Isolation voltage: Type Test 1250V ac rms for 60
seconds
PROFIBUS to logic: non-isolated
Field power: non-isolated
Indicators 4 red/green I/O status
Wiring Terminal block connector
screw torque: 7 inch pounds maximum
IMPORTANT: This analog base module can accommodate a maximum of two discrete
expansion modules.