Schneider OTB1E0DM9LP Ethernet I/O Module

Schneider Electric OTB1E0DM9LP Distributed I/O Module

Product Introduction

The OTB1E0DM9LP belongs to the Advantys OTB family of optimized distributed I/O solutions. Schneider Electric designed this module to serve as an Ethernet bus coupler within Modbus TCP architectures. Consequently, it enables seamless data exchange between a master controller and field devices. The module integrates 20 I/O points directly on the base unit. Moreover, it accepts up to seven TM2 expansion modules for additional capacity.

Important Lifecycle Notice: This product reached its end-of-sale date on January 19, 2026. Schneider Electric recommends the TM3BCEIP bus coupler with TM3 distributed I/O as the official replacement path.

Technical Specifications

The OTB1E0DM9LP provides 12 discrete inputs rated for 24 V DC operation. These inputs support both sink and source wiring configurations. Furthermore, the module delivers 8 discrete outputs split into two groups. Specifically, two solid-state PNP outputs handle 0.3 A each, while six relay outputs manage up to 2 A. This mixed output design suits applications requiring both fast switching and higher load capacity.

For communication, the module features one Ethernet RJ45 port operating at 10/100 Mbit/s. It supports Modbus TCP protocol and achieves Transparent Ready Class A10 certification. Additionally, the integrated web server allows basic diagnostics and configuration access. The bus length can extend up to 100 m using copper cabling.

Special Functions and Expansion

Beyond standard I/O, the OTB1E0DM9LP includes advanced counting capabilities. It provides two high-speed counters operating at up to 20 kHz. For instance, these counters support up/down counting, single-phase, and two-phase modes. Furthermore, the module offers two pulse generator outputs at 7 kHz for simple motion or positioning tasks.

The base unit accepts up to seven TM2 expansion modules. This expansion capability allows users to tailor the I/O count to specific application needs. However, the migration documentation notes that embedded counter and pulse functions have no direct replacement in the TM3 migration path.

Mechanical and Environmental Parameters

The module measures 90 mm in height, 55 mm in width, and 70 mm in depth. Its compact footprint suits dense panel layouts. The unit mounts easily on standard 35 mm DIN rail. Operating temperature ranges from 0 °C to 55 °C. Storage temperature spans -25 °C to 70 °C. The protection rating is IP20, making it suitable for clean industrial environments. Moreover, the module weighs approximately 0.195 kg according to Schneider specifications.

Installation Guide

First, mount the OTB1E0DM9LP securely onto a DIN rail. Next, connect the 24 V DC power supply to the designated terminals. Then, wire the sensors and actuators to the removable screw terminal blocks. After that, attach the Ethernet cable to the RJ45 port for network connectivity. Finally, configure the island address and baud rate using the rotary coding wheels.

Additionally, ensure proper grounding to minimize electrical noise. Keep communication cables separated from high-power conductors where possible. Furthermore, verify that the total current draw stays within the 700 mA bus current limit at 26.2 V. For expansion, slide TM2 modules onto the right-side connector until they click into place.

Packaging List

• 1 x Schneider OTB1E0DM9LP Advantys OTB distributed I/O module

• 1 x Anti-static protective bag

• 1 x Carton box with foam padding

FAQ

Q1: Is the OTB1E0DM9LP still available for purchase?
A: No. Schneider Electric discontinued this model on January 19, 2026. End-of-service support continues until January 19, 2032. Consider the TM3BCEIP replacement.

Q2: What is the recommended replacement for this module?
A: Schneider Electric recommends the TM3BCEIP bus coupler paired with TM3 distributed I/O modules. However, note that embedded counter and PWM functions are not directly replaced.

Q3: How many expansion modules does this unit support?
A: The OTB1E0DM9LP accepts up to 7 TM2 expansion modules. This allows configuration of additional digital or analog I/O points.

Q4: What communication protocol does this module use?
A: It uses Ethernet TCP/IP with Modbus TCP protocol support. The module also provides an integrated web server for basic diagnostics.

Q5: How fast can you ship this part?
A: We ship by Fedex, UPS, and DHL. Most orders leave the warehouse within 1–2 business days after payment.