Rockwell Automation Allen-Bradley 1769-IF4, Руководство пользователя

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Publication 1769-UM002B-EN-P - July 2005
Specifications A-9
1769-OF8C Output
Specifications Table A.5 1769-OF8C Specifications
Specification 1769-OF8C
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 to 20 mA, 4 to 20 mA
Full Scale Analog Ranges
(1)
0 to 21 mA, 3.2 to 21 mA
Number of Outputs 8 single-ended
Bus Current Draw (max.) 145 mA at 5V dc
160 mA at 24V dc
(2)
(2)
If the optional 24V dc Class 2 power supply is used, the 24V dc current draw from the bus is 0 mA.
Heat Dissipation 2.69 Total Watts (All points - 21 mA into 250
Ω
- worst
case calculated.)
Digital Resolution Across Full
Range 16 bits (unipolar)
+4 to +20 mA: 15.59 bits, 0.323 µA/bit
0 to +20 mA: 15.91 bits, 0.323 µA/bit
Conversion Rate (all channels)
max. 5 ms
Step Response to 63%
(3)
(3)
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
Ω
(includes wire resistance)
Max. Inductive Load 0.1 mH
Field Calibration None required
Overall Accuracy
(4)
(4)
Includes offset, gain, drift, non-linearity and repeatability error terms.
±0.35% full scale at 25°C