Rockwell Automation 1769-OF4VI Compact I/O Isolated Analog Modules - Manual (Page 87)

Publication 1769-UM014B-EN-P - May 2010
Specifications A-5
1769-OF4CI Output
Specifications
Table A.3 1769-OF4CI Specifications
Specification 1769-OF4CI
Analog Normal Operating
Ranges
(1)
(1) The over- or under-range flag will come on when the normal operating range (over/under) is exceeded. The module will
continue to convert the analog input up to the maximum full scale range. The flag automatically resets when within the
normal operating range unless configured to latch.
0…20 mA, 4…20 mA
Full Scale Analog Ranges (1) 0…21 mA, 3.2…21 mA
Number of Outputs 4 isolated differential
Bus Current Draw, Max 145 mA at 5V dc
140 mA at 24V dc
Heat Dissipation 2.68 total W (All points - 21 mA into 250  - worst case
calculated.)
Digital Resolution Across Full
Range
16 bits (unipolar)
+4…+20 mA: 15.59 bits, 0.323 µA/bit
0…+20 mA: 15.91 bits, 0.323 µA/bit
Conversion Rate (all channels),
Max
110 ms
Step Response to 63% (2)
(2) Step response is the period of time between when the D/A converter was instructed to go from minimum to full range until
the device is at 63% of full range.
<2.9 ms
Resistive Load on Current
Output
0 to 500  (includes wire resistance)
Max. Inductive Load 0.1 mH
Field Calibration None required
Overall Accuracy (3)
(3) Includes offset, gain, drift, non-linearity and repeatability error terms.
±0.35% full scale at 25 °C
Accuracy Drift with
Temperature
±0.0058% FS per °C
Output Ripple (4)
Range 0…50 kHz
(referred to output range)
(4) Output ripple is the amount a fixed output varies with time, assuming a constant load and temperature.
±0.05%
Non-linearity (in percent full
scale)
±0.05%
Repeatability (5)
(in percent full scale)
(5) Repeatability is the ability of the output module to reproduce output readings when the same controller value is applied to it
consecutively, under the same conditions and in the same direction.
±0.05%
Output Error Over Full
Temperature Range
0…60 °C (+32…+140 °F)
±0.55%