Allen-Bradley MicroLogix 1400 - Page 187

Rockwell Automation Publication 1766-UM001I-EN-P - June 2015 173
Specifications Appendix A
Thermocouple B ±3.0 °C [±5.4 °F] ±4.5 °C [±8.1 °F] ±0.1009 °C/ °C [±0.1009 °F/ °F]
±50 mV ±15 µV±25 µV ±0.44µV/ °C [±0.80µV/ °F]
±100 mV ±20 µV±30 µV ±0.69µV/ °C [±01.25µV/ °F]
(1) The module uses the National Institute of Standards and Technology (NIST) ITS-90 standard for thermocouple linearization.
(2) Accuracy and temperature drift information does not include the affects of errors or drift in the cold junction compensation circuit.
(3) Accuracy is dependent upon the analog/digital converter output rate selection, data format, and input noise.
(4) Temperature drift with autocalibration is slightly better than without autocalibration.
1762-IT4 Accuracy
Input Type
(1)
With Autocalibration Enabled Without Autocalibration
Accuracy
(2) (3)
for 10 Hz, 50 Hz and 60 Hz
Filters (max.)
Maximum Temperature Drift
(2) (4)
at 25 °C [77 °F]
Ambient
at 0…60 °C
[32…140 °F]
Ambient
at 0…60 °C [32…140 °F]
Ambient
TIP
For more detailed 1762-IT4 accuracy information, see
publication 1762-UM002.
Output Specifications
Specification 1762-IF2OF2 1762-OF4
Number of outputs 2 single-ended (unipolar) 4 single-ended (unipolar)
(2)
Update time (typical) 4.5 ms
D/A converter type Resistor string R-2R Ladder Voltage Switching
Resistive load on current output 0...500 Ω (includes wire resistance) 0...500 Ω (includes wire resistance)
Load range on voltage output > 1kΩ > 1KΩ
Reactive load, current output < 0.1 mH < 0.1 mH
Reactive load, voltage output < 1 µF< 1 µF
Typical overall accuracy
(1)
±1.17% full scale at -20...65 °C
(2)
±0.5% full scale at 25 °C
±1.17% full scale at -20...65 °C
(2)
±0.5% full scale at 25 °C
Output ripple
range 0…500 Hz
(referred to output range)
< ±0.1% < ±0.1%
Non-linearity (in percent full scale) < ±0.59%
(2)
< ±0.59%
(2)
Open and short-circuit protection Continuous Continuous
Output protection ±32 mA ±32 mA
(1) Includes offset, gain, non-linearity and repeatability error terms.
(2) Only applicable to Series B I/O modules.