Schneider Electric OTB1CDDM24LP Distributed I/O Module
Product Introduction
The OTB1CDDM24LP belongs to the Advantys OTB family of optimized distributed I/O solutions. Schneider Electric designed this module as an expansion unit for OTB communication bases. Consequently, it adds 24 discrete I/O points to an existing island. The module integrates 16 inputs and 8 relay outputs directly on the unit. Moreover, it connects to the base module through the right-side expansion connector. This design suits applications that require more I/O than the 20 points available on a standard OTB interface.
Important Lifecycle Notice: This product has reached its end-of-sale status. Schneider Electric recommends migrating to the TM3 distributed I/O platform for new installations.
Technical Specifications
The OTB1CDDM24LP provides 16 discrete inputs rated for 24 V DC operation. These inputs support both sink and source wiring configurations. Furthermore, the module delivers 8 relay outputs capable of handling up to 2 A each. The relay contacts suit resistive and inductive loads in industrial control circuits.
For communication, the module operates through the host OTB interface base. It does not include a separate network port. The host base manages CANopen communication, while the expansion module handles additional I/O. Additionally, the module uses the same removable screw terminal blocks as the base unit. This design simplifies wiring and maintenance.
Mechanical and Environmental Parameters
The module measures 90 mm in height, 55 mm in width, and 70 mm in depth. Its compact footprint matches the OTB base module for a uniform panel layout. 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 0.32 kg.
Installation Guide
First, mount the OTB interface base securely onto a DIN rail. Next, slide the OTB1CDDM24LP onto the right side of the base or the last expansion module. Then, press it until the connector clicks into place. After that, wire the sensors and actuators to the removable terminal blocks. Finally, secure the terminal blocks and verify all connections.
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 supply limits. The expansion module draws power from the base unit through the internal bus connector.
Packaging List
1 x Schneider OTB1CDDM24LP Advantys OTB expansion I/O module
1 x Anti-static protective bag
1 x Carton box with foam padding
FAQ
Q1: Is the OTB1CDDM24LP still available for purchase?
A: No. Schneider Electric discontinued this model. Consider migrating to the TM3 distributed I/O platform for new installations.
Q2: What is the recommended replacement for this module?
A: Schneider Electric recommends the TM3 expansion modules for new designs. However, note that the migration path may require different base units and wiring.
Q3: How many expansion modules can the OTB base support?
A: An OTB interface base accepts up to 7 expansion modules. This limit applies to all OTB expansion units, including the OTB1CDDM24LP.
Q4: What communication protocol does this module use?
A: The expansion module operates through the host OTB interface base. The base unit determines the network protocol, such as CANopen, Ethernet, or Modbus.
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.
