Overview
The 140ACI04000C is a Schneider Modicon Quantum analog input module, part of the Modicon Quantum automation platform. It provides 16 differential input channels accepting 4-20 mA signals, with a single-pole low-pass filter set at 34 Hz and broken-wire detection on the 4-20 mA range. The module draws 5.0 W from the backplane and carries CE marking, UL 508, and CSA C22.2 No 142 certifications.
Each of the 16 differential inputs measures current loops with an input impedance of 250 Ω. The module supports multiple full-scale ranges: 0-16000 counts for 4-20 mA, 0-20000 counts for 0-20 mA, and 0-25000 counts for 0-25 mA, with a linearity error of ±12 µA max on the 4-20 mA range. The absolute maximum input is 30 mA, protecting the front end against sustained overcurrent. The single-pole low-pass filter at 34 Hz (±25%) attenuates high-frequency noise common in industrial environments. Update time is 15 ms for both 2-wire and 4-wire configurations, suitable for process loops where sub-cycle response is not required. The module requires 17 input words of addressing space in the Quantum backplane. Broken-wire detection on the 4-20 mA range flags an open loop via the red external fault LED, while 16 green channel LEDs indicate active inputs. Accuracy is rated at -0.125% of full scale, typical for mid-range analog input modules in the Quantum family.
Applications
This module is used in process and hybrid automation systems where 4-20 mA transmitters — pressure, temperature, flow, level — must be read across multiple points. Typical installations include water and wastewater treatment skids, chemical batch reactors, and material-handling conveyors where analog feedback from sensors is consolidated into the Quantum controller.
The 140ACI04000C carries CE marking and is certified to UL 508 and CSA C22.2 No 142, with additional FM Class 1 Division 2 and cUL approvals for hazardous locations. It also lists California Proposition 65 compliance. The module includes conformal coating (Humiseal 1A33) for protection against moisture and contaminants. Warranty is 18 months from date of manufacture.
The module mounts to a Quantum chassis backplane and occupies one slot. It is a standard-format module (no extended height). The conformal coating protects against condensation and corrosive atmospheres. Operating temperature range is not explicitly listed, but storage range is -40 to 185 °F (-40 to 85 °C). Maximum altitude is 16404.2 ft.