Schneider TM3AI8 Analog Input Module 8-Channel

Product Introduction

The TM3AI8 expands Schneider Electric's Modicon TM3 range with eight analog input channels. This module suits compact PLC systems that need dense signal acquisition. Engineers select it when multiple voltage or current sensors share one rack slot. The unit accepts 0–10 Vdc, ±10 Vdc, 0–20 mA, and 4–20 mA signals. Every channel configures independently through software.

Technical Specifications

Specifically, the TM3AI8 provides 12-bit resolution (11 bits plus sign for signed ranges). Accuracy reaches ±0.1% of full scale at 25 °C. Temperature drift remains within ±1% of full scale across the operating range. Conversion takes 1 ms plus 1 ms per channel plus one controller cycle. Sampling duration is 1 ms per enabled channel. Isolation delivers 1500 V AC between input and supply, plus 500 V AC between input and internal logic. Diagnostics track channel status, module status, and bus status. The removable screw terminal block uses 3.81 mm pitch.

Mechanical and Environmental Parameters

Furthermore, the TM3AI8 measures 90 × 23.6 × 70 mm (H×W×D). It weighs 0.115 kg. Operating temperature ranges from 0 to +55 °C. Storage temperature spans −25 to +70 °C. Protection rating is IP20. The module mounts on standard DIN rail (TH35-15 or TH35-7.5). A green PWR LED confirms bus power.

Installation Guide

First, mount the TM3AI8 onto a DIN rail. Next, connect the expansion bus to the controller. Then, wire analog signals using twisted-pair shielded cable. After wiring, configure each channel via EcoStruxure Machine Expert software. Finally, verify the PWR LED illuminates green. The module draws 50 mA at 5 V DC under full load and 40 mA at 24 V DC. Use a stable 24 Vdc supply through the TM3 bus.

Packaging List

• 1 × Schneider TM3AI8 Analog Input Module

• 1 × Removable Screw Terminal Block

• 1 × Product Documentation

Shipping methods: Fedex, UPS, DHL.

FAQ

Q1: How many channels does the TM3AI8 have?
The module provides 8 analog input channels. Each channel supports voltage or current signals independently.

Q2: What is the resolution of the TM3AI8?
It offers 12-bit resolution. Signed ranges use 11 bits plus sign for accurate measurement.

Q3: Which PLC controllers work with the TM3AI8?
It pairs with Modicon M221, M241, M251, and M262 controllers. These platforms accept TM3 expansion modules directly.

Q4: What signal types does the TM3AI8 support?
Voltage options include 0–10 Vdc and ±10 Vdc. Current options cover 0–20 mA and 4–20 mA.

Q5: What is the conversion time for the TM3AI8?
Total conversion requires 1 ms plus 1 ms per channel plus one controller cycle. Sampling alone takes 1 ms per enabled channel.