Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers - Manual (Page 109)

Publication 1762-UM001G-EN-P - March 2011
Specifications A-17
Table A.21 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
configuration dependent NA
A/D converter type Successive
approximation Successive
approximation Delta-Sigma Delta-Sigma
Common mode voltage
range
(1)
±27 V ±27 V NA ±10 V
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 …149 °F)
(4)
±0.3% full scale at
25 °C (77 °F)
±0.32% full scale at
-20…65 °C
(-4 …149 °F)
(4)
±0.24% full scale at
25 °C (77 °F)
±0.5 °C (32.9 °F) for
Pt 385 NA
Input impedance Voltage Terminal: 200 k
Ω
Current Terminal: 250
Ω
Voltage Terminal: 200 k
Ω
Current Terminal: 275
Ω
>10
ΜΩ
>10
ΜΩ
Current input protection ±32 mA ±32 mA NA NA
Voltage input protection ±30 V ±30 V 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) Vcm = 1 Vpk-pk AC
(3) Vcm = 0 (includes offset, gain, non-linearity and repeatability error terms)
(4) Only applicable to Series B I/O modules.