Specifications

Publication 1747-SG001E-EN-E - February 2013
Select SLC 500 I/O Modules 19
Conversion method sigma-delta modulation successive approximation
Converter resolution 16 bit 12 bit
Conversion time N/A 7.5 μs every 512 μs (nominal)
Module throughput
delay
512 μs (nominal)
1.10 ms (maximum)
(1)
512 µs (typical)
(1) Worst-case throughput occurs when the module just misses an event.
General Input Specifications for 4-Channel Modules
Specification 1746-NI4 1746-NIO4I 1746-NIO4V 1746-FIO4I 1746-FIO4V
Current Loop Input Specifications for 4-Channel Modules
Specification 1746-NI4 1746-NIO4I 1746-NIO4V 1746-FIO4I 1746-FIO4V
Full scale 20 mA 20 mA 20 mA 20 mA 20 mA
Input range ±20 mA (nominal)
±30 mA (maximum)
0…20 mA (nominal)
for 0…30 mA (maximum)
Current input coding ±16,384 for ±20mA 0…2047 counts for 0…20 mA
Absolute maximum
input voltage
±7.5V DC or 7.5V AC RMS
Input Impedance 250 Ω (nominal) 250 Ω (nominal)
Resolution 1.22070 μA per LSB 9.7656 μA per bit
Overall accuracy @
25 °C (77 °F)
±0.365% of full scale ±0.510% of full scale
Overall accuracy,
0…60 °C (32…140
°F)
±0.642% of full scale (maximum) ±0.850% of full scale
Overall accuracy drift +79 ppm/°C of full scale +98 ppm/°C of full scale (maximum)
Gain error @ 25 °C
(77 °F)
+0.323% (maximum) +0.400% (maximum)
Gain error,
0…60 °C (32…140
°F)
+0.556% (maximum) +0.707% of full scale
Gain error drift ±67 ppm/°C ±89 ppm/°C (maximum)
Voltage Input Specifications for 4-Channel Modules
Specification 1746-NI4 1746-NIO4I 1746-NIO4V 1746-FIO4I 1746-FIO4V
Full Scale 10V DC 10V DC 10V DC 10V DC 10V DC
Input Range ±10V DC -1 LSB 0…10V DC -1 LSB
Input Impedance 1 MΩ
Overvoltage Protection (IN+ to -IN) 220V DC or AC RMS continuously 220V dc or ac RMS continuously
Resolution 305.176 μV per LSB 2.4414 mV per LSB (nominal)
Voltage input coding -32,768…+32,767 for +10V DC 0…4095 counts for 0…10V DC
Overall accuracy @ 25 °C (77 °F) ±0.284% of full scale ±0.440% of full scale
Overall Accuracy, 0…60 °C (32…140 °F) ±0.504% of full scale ±0.750% of full scale