Schneider 140ATI03000C 8-Channel Thermocouple Input Module

140ATI03000C 8-Channel Thermocouple Input Module for Modicon Quantum

Product Introduction

The 140ATI03000C from Schneider Electric expands the analog input capacity of Modicon Quantum automation platforms. This module accepts eight thermocouple inputs, converting temperature signals into digital data with 16-bit precision. It employs a notch filter at 50/60 Hz alongside a single-pole low-pass filter at 20 Hz. These filters effectively attenuate electrical noise from power lines and high-frequency interference. Furthermore, the 140ATI03000C offers cold junction compensation internally, ensuring accurate readings across varying ambient temperatures. Its compact standard format fits seamlessly into Quantum racks, making it an ideal choice for temperature monitoring applications.

Input Specifications and Thermocouple Support

The 140ATI03000C accommodates multiple thermocouple types to suit diverse temperature measurement needs. It supports J, E, K, T, R, and S thermocouples, covering ranges from -270°C up to 1665°C. Specifically, J-type covers -210°C to 760°C, while K-type spans -270°C to 1370°C. For high-temperature applications, R and S types measure up to 1665°C. The module's 16-bit resolution delivers fine granularity for precise temperature control loops.

Additionally, the 140ATI03000C provides absolute accuracy errors as low as ±2°C plus 0.1% of reading for most types. For R and S types, accuracy is ±4°C plus 0.1% of reading. The linearity error remains within 1°C across all supported ranges. These specifications ensure reliable performance in critical processes like chemical reactors or furnace monitoring.

Filtering and Signal Conditioning

Effective noise rejection is crucial for thermocouple measurements. The 140ATI03000C incorporates a notch filter with -3 dB attenuation at 50 and 60 Hz. This filter eliminates power-frequency interference commonly present in industrial environments. Meanwhile, the single-pole low-pass filter at 20 Hz removes high-frequency noise components. Consequently, the module delivers stable readings even near variable-frequency drives or welding equipment.

Moreover, the common mode rejection ratio exceeds -120 dB at 50/60 Hz. This high rejection rate prevents ground loop errors from affecting measurement accuracy. The module also detects broken wires and over-ranging faults, providing diagnostic feedback through red LEDs.

Electrical and Power Characteristics

The 140ATI03000C draws 280 mA from the Quantum backplane bus. Its power dissipation is only 1.5 watts, minimizing heat buildup inside the control cabinet. The isolation between channels and the bus withstands 1780V AC and 2500V DC for 60 seconds. Channel-to-channel isolation handles 300V DC or 220V AC. This robust isolation protects the module from voltage spikes and ground potential differences.

Furthermore, the update time is 1000 ms, providing fresh data every second. This cycle aligns well with typical temperature control scanning requirements.

Environmental and Mechanical Parameters

The 140ATI03000C operates within an ambient temperature range of 0°C to 60°C. Storage temperatures span from -40°C to 85°C. Relative humidity tolerance reaches 95% without condensation, making it suitable for humid environments. The module carries UL 508, CSA C22.2 No 142, and FM Class 1 Division 2 certifications. These approvals confirm its safety for use in hazardous locations.

Additionally, the unit withstands electrostatic discharge of 4 kV contact and 8 kV air discharge. Electromagnetic field immunity meets 9.1 V/m at 80–1000 MHz. A conformal coating (Humiseal 1A33) protects the PCB from moisture and contaminants. The module weighs only 0.3 kg, facilitating easy handling during installation.

Installation and Addressing Guide

Installing the 140ATI03000C follows standard Quantum rack procedures. First, power down the PLC rack before insertion. Align the module with the selected slot and push firmly until seated. Secure the retaining clips to lock the module in place. Next, connect thermocouple wires to the appropriate terminals, observing polarity. The module requires 10 input words for addressing in the CPU configuration.

Configure the module using the programming software to select thermocouple types per channel. Furthermore, enable cold junction compensation for accurate ambient temperature correction. Finally, test each channel with a known temperature source to verify calibration.

Packaging List

Your shipment of the 140ATI03000C includes these items:

• One analog input module

• Quick-start installation guide

• Terminal block connector (if applicable)

Note: Thermocouple cables and mounting hardware are not supplied.

Shipping Information

We ship all orders via trusted international carriers. Delivery methods include Fedex, UPS, and DHL with full tracking capabilities.

Frequently Asked Questions (FAQ)

Q1: Is the 140ATI03000C compatible with Modicon Premium PLCs?
A1: This module is specifically designed for the Modicon Quantum automation platform. Premium series compatibility is not supported.

Q2: Can I mix different thermocouple types on the same module?
A2: Yes, the 140ATI03000C allows individual configuration for each channel. You can assign different thermocouple types per input.

Q3: What happens if a thermocouple wire breaks?
A3: The module detects broken wires and signals a fault via the red channel LED. The CPU receives a diagnostic message for appropriate action.

Q4: How often does the 140ATI03000C update its input values?
A4: The update time is fixed at 1000 ms. The module refreshes all eight channels simultaneously every second.

Q5: Does the 140ATI03000C require external power supply?
A5: No, it draws power from the Quantum backplane bus at 280 mA. No separate power connection is necessary.