Rockwell Automation Publication 1766-UM001I-EN-P - June 2015 169
Specifications Appendix A
Input Specifications
Specification 1762-IF2OF2 1762-IF4 1762-IR4 1762-IT4
Number of inputs 2 differential (unipolar) 4 differential (bipolar) 4 4 input channels plus 1 CJC
sensor
Update time (typical) 2.5 ms 130, 250, 290, 450, 530 ms
(selectable)
Input filter and cofiguration
dependent
NA
A/D converter type Successive approximation Successive approximation Delta-Sigma Delta-Sigma
Common mode voltage
range
(1)
±27V ±27V NA ±10V
Common mode rejection
(2)
> 55 dB at 50 and 60 Hz > 55 dB at 50 and 60 Hz >110 dB at 50 Hz (with 10 or
50 Hz filter)
>110 dB at 60 Hz (with 10 or
60 Hz filter)
>110 dB at 50 Hz (with 10 or
50 Hz filter)
>110 dB at 60 Hz (with 10 or
60 Hz filter)
Non-linearity (in percent full
scale)
±0.12%
(4)
±0.12%
(4)
±0.05% NA
Typical overall accuracy
(3)
±0.55% full scale at
-20…65 °C
(4)
±0.3% full scale at 25 °C
±0.32% full scale at
-20…65 °C
(4)
±0.24% full scale at 25 °C
±0.5 °C (F °) for Pt 385 NA
Input impedance Voltage Terminal: 200 KΩ
Current Terminal: 250 Ω
Voltage Terminal: 200 KΩ
Current Terminal: 275 Ω
>10 ΜΩ >10 ΜΩ
Current input protection ±32 mA ±32 mA NA NA
Voltage input protection ±30V ±30V NA NA
Channel diagnostics Over or under range or open
circuit condition by bit
reporting for analog inputs.
Over or under range or open
circuit condition by bit
reporting for analog inputs.
Over or under range or open
circuit condition by bit
reporting for analog inputs.
Over or under range or open
circuit condition by bit
reporting for analog inputs.
(1) For proper operation, both the plus and minus input terminals must be within ±27V (±10V for 1762-IT4) of analog common.
(2) V
cm
= 1 V
pk-pk
AC
(3) V
cm
= 0 (includes offset, gain, non-linearity and repeatability error terms)
(4) Only applicable to Series B I/O modules.
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