Schneider Electric 140ACI03000 Analog Input Module – 8-Channel Differential for Modicon Quantum

Product Overview

The Schneider Electric 140ACI03000 is an eight-channel analog input module for the Modicon Quantum automation platform, engineered to bring field transmitter signals into a Quantum PLC with high accuracy and strong noise rejection. Each of the eight channels on the 140ACI03000 is individually configurable for either a 4–20 mA current loop or a 1–5 V DC voltage signal, so a single module can serve a mixed instrument population — pressure transmitters on current loops alongside flow meters on voltage output — without dedicating separate modules to each signal type. That flexibility is the practical reason the part appears in so many installed Quantum racks.Signal integrity is where the 140ACI03000 earns its place. Inputs are differential rather than single-ended, measuring the difference between the positive and negative terminals and thereby rejecting common-mode noise that appears equally on both conductors. Schneider specifies better than 72 dB of common-mode rejection at 60 Hz, reinforced by a single-pole low-pass filter with a −3 dB point at 15 Hz, which attenuates high-frequency interference before conversion. Channel-to-bus isolation is rated at 1000 V DC continuously and 3000 V DC for one minute, protecting the Quantum backplane and the CPU from transients and ground potential differences originating in the field.In accuracy terms, the 140ACI03000 delivers 12-bit resolution with typical absolute error of ±0.05 % of full scale and linearity within ±0.04 %, at a 5 ms update across all eight channels. Broken-wire detection in current mode and undervoltage detection in voltage mode give per-channel fault visibility, reported both through front-panel LEDs and through the module’s status word in the PLC. The module draws 240 mA from the Quantum backplane and dissipates 2 W, requiring no separate field power supply for its own electronics.

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Description

Technical Specifications

Parameter Name	Parameter Value
Product Model	140ACI03000 (140 ACI 030 00)
Manufacturer	Schneider Electric
Product Type	Analog Input Module (8 I multirange)
Product Range	Modicon Quantum automation platform
Number of Channels	8, differential input
Input Signal Ranges	1–5 V DC or 4–20 mA, individually configurable per channel
Analogue Input Resolution	12 bits
Addressing Requirement	9 input words
Input Impedance	250 Ω (±0.01 %) in current mode; > 20 MΩ in voltage mode
Absolute Maximum Input	50 V DC, 25 mA
Absolute Accuracy Error	±0.05 % of full scale typical; ±0.1 % of full scale maximum
Linearity Error	±0.04 %
Temperature Drift	±0.0025 % of full scale/°C typical (≤ 0.005 % maximum)
Common Mode Rejection	> 72 dB at 60 Hz
Input Filter	Single-pole low pass, −3 dB at 15 Hz (± 20 %)
Isolation Channel-to-Bus	1000 V DC continuous; 3000 V DC for 60 s
Isolation Channel-to-Channel	30 V DC maximum
Update Time	5 ms for all channels
Fault Detection	Broken wire (4–20 mA mode); undervoltage (1–5 V mode)
Bus Current Requirement	240 mA at 5 V DC from Quantum backplane
Power Dissipation	2 W
Local Signalling	1 green LED (Active), 1 red LED (F external fault), 8 green channel-on LEDs, 8 red channel-fault LEDs
Ambient Operating Temperature	0 °C to 60 °C
Storage Temperature	−40 °C to 85 °C
Relative Humidity	95 % non-condensing
Operating Altitude	≤ 5000 m
ESD / EMC Immunity	4 kV contact / 8 kV air (IEC 801-2); 10 V/m, 80–1000 MHz (IEC 801-3)
Product Certifications	CE, UL 508, CSA C22.2 No 142, cUL, FM Class 1 Division 2
Module Format / Net Weight	Standard single-slot Quantum module / 0.3 kg (0.7 lb)

Main Features and Advantages

Differential inputs for electrically hostile environments: The 140ACI03000 measures across paired conductors rather than against a shared reference, so noise induced along a cable run — from variable-frequency drives, switchgear or long parallel cable trays — is largely cancelled before it reaches the converter. Combined with the 15 Hz input filter and 1000 V channel-to-bus isolation, this makes the module a sound choice where transmitters sit far from the PLC rack or where field grounds differ from panel ground. Plants that have chased unstable readings on single-ended modules know how much troubleshooting time this architecture saves.Mixed signal capability on one module: Because every channel on the 140ACI03000 is configured independently for current or voltage, engineers do not have to segregate instruments by output type when laying out a rack. A module can carry four 4–20 mA pressure transmitters and four 1–5 V flow signals simultaneously, which reduces the number of modules purchased, simplifies the spares holding, and leaves free slots for future expansion.Diagnostics that point at the actual problem: The 140ACI03000 detects an open circuit in current mode and an undervoltage condition in voltage mode, flagging the fault on the corresponding red channel LED and in the module status word. Rather than an operator noticing a suspicious trend and a technician then walking the loop with a multimeter, the fault is localised to a specific channel at the rack. Schwarz’s removable terminal block means the suspect wiring can then be released and re-landed without disturbing the module or its addressing.Fast enough for control loops: A 5 ms update across all eight channels keeps the 140ACI03000 responsive for PID regulation of pressure, flow and level, not merely for monitoring. Twelve-bit resolution with ±0.05 % typical accuracy gives the control algorithm clean data, and the 240 mA backplane draw means the module adds negligible load to the rack power budget.Service-friendly Quantum mechanics: The module occupies one standard Quantum slot and works in any slot of any Quantum backplane, from 2 to 16 slots, with the platform’s optical bus isolation allowing hot swap in supported configurations. Keying kits ship with each module so field wiring cannot be mated to the wrong module type after maintenance.