16
Publication 1747-SG001D-EN-P — January 2009
4-Channel Analog I/O Modules
Cat. No.
Backplane Current (mA) at 5V
Backplane Current (mA) at 24V
Number of Inputs
Backplane Isolation
Step Response
Conversion Method
Converter Resolution
Conversion Time
Module Throughput Delay
General Input Specifications for 4-Channel Modules
1746-NI4
1746-NIO4I
1746-NIO4V
1746-FIO4I
1746-FIO4V
25 mA
55 mA
55 mA
55 mA
55 mA
85 mA
145 mA
115 mA
150 mA
120 mA
4
2
2
2
2
500V ac and 710V dc withstand for 1 minute
60 ms
100
μ
s
sigma-delta modulation
successive approximation
16 bit
12 bit
N/A
7.5
μ
s every 512
μ
s (nominal)
512
μ
s (nominal)
1.10 ms (maximum)
✶
512
μ
s (typical)
✶
Worst-case throughput occurs when the module just misses an event.
Cat. No.
Full Scale
Input Range
Current Input Coding
Absolute Maximum Input Voltage
Input Impedance
Resolution
Overall Accuracy
at 25 °C (77 °F)
Overall Accuracy,
0…60 °C (32…140 °F)
Overall Accuracy Drift
Gain Error at
25 °C (77 °F)
Gain Error,
0…60 °C (32…140 °F)
Gain Error Drift
Current Loop Input Specifications for 4-Channel Modules
1746-NI4
1746-NIO4I
1746-NIO4V
1746-FIO4I
1746-FIO4V
20 mA
20 mA
20 mA
20 mA
20 mA
±20 mA (nominal)
±30 mA (maximum)
0…20 mA (nominal)
for 0…30 mA (maximum)
±16,384 for ±20mA
0…2047 counts for 0…20 mA
±7.5V dc or 7.5V ac RMS
250
Ω
(nominal)
250
Ω
(nominal)
1.22070
μ
A per LSB
9.7656
μ
A per bit
±0.365% of full scale
±0.510% of full scale
±0.642% of full scale (maximum)
±0.850% of full scale
+79 ppm/°C of full scale
+98 ppm/°C of full scale (maximum)
+0.323% (maximum)
+0.400% (maximum)
+0.556% (maximum)
+0.707% of full scale
±67 ppm/°C
±89 ppm/°C (maximum)
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