Is Your CANopen Network Ready for a Smarter I/O Drop?
What happens when a machine needs more digital points than the controller can handle, but rewiring the whole panel is out of the question? The Schneider OTB1CODM9LP answers that challenge. This Advantys OTB distributed I/O module acts as a CANopen slave, moving 20 I/O points out of the cabinet and onto the machine where they belong. It is not a programmable controller — it is a bus coupler built for fast, clean field expansion.
What the OTB1CODM9LP Delivers on the Factory Floor
The OTB1CODM9LP packs 12 digital inputs rated 24 Vdc, sink/source, Type 1 per IEC 61131-2. That means standard sensors, pushbuttons, and limit switches connect directly without signal conditioning. The 8 digital outputs split into 2 solid-state PNP channels at 0.3 A and 6 relay channels at 2 A. Use the fast solid-state points for pneumatic valves, and the relays for higher-current loads such as lamps or contactors.
Two high-speed counters run at 20 kHz, and two pulse generators output 7 kHz. These features suit simple positioning, flow metering, or encoder feedback tasks that would otherwise demand a dedicated card. Because the module supports up to 7 TM2 expansion modules, you can grow the I/O count later without changing the network drop.
Technical Specifications at a Glance
| Parameter | Value |
|---|---|
| Supply voltage | 24 V DC (20.4…26.4 V) |
| Power consumption | 19 W |
| Bus current | 700 mA at 26.2 V |
| Digital inputs | 12 (24 Vdc, sink/source) |
| Digital outputs | 2 solid-state PNP 0.3 A + 6 relay 2 A |
| High-speed counters | 2 × 20 kHz |
| Pulse outputs | 2 × 7 kHz |
| Expansion modules | Up to 7 TM2 modules |
| Communication | 1× CANopen (SUB-D9), slave |
| Operating temperature | 0…+55 °C |
| Protection rating | IP20 |
| Dimensions (H×W×D) | 90 × 55 × 70 mm |
| Weight | 0.195 kg |
Replacement and Upgrade Guide for Legacy Systems
Schneider Electric has discontinued the OTB1CODM9LP. For plants still running Advantys OTB networks, this creates a real risk: a single failed module can halt a production line. The recommended migration path is the TM3BCEIP bus coupler paired with TM3 distributed I/O. That platform uses EtherNet/IP, so it fits modern control architectures better than CANopen in many cases.
Before you rip out a working CANopen segment, weigh the cost. A full migration touches wiring, PLC code, and commissioning time. Keeping spare OTB1CODM9LP units on the shelf often costs far less than an unplanned retrofit. SpareTechPLC helps buyers compare both routes and source the parts that keep legacy lines running.
Where This Module Fits Best
Packaging and Assembly Cells
A CANopen drop with 12 inputs and 8 outputs handles the sensor and valve count of a typical indexing table. The 20 kHz counters capture product counts without burdening the main controller.
Material Handling Conveyors
Relay outputs at 2 A switch motor starters and diverters directly. The IP20 rating suits mounting inside a guarded enclosure near the conveyor frame.
Water and Wastewater Panels
Distributed I/O reduces home-run wiring across large tanks. The 24 V DC supply and 0…+55 °C range match typical panel environments.
Installation Notes for a Clean Commissioning
Mount the module on a DIN rail inside an enclosure that maintains IP20 protection. Keep the 24 V DC supply within 20.4…26.4 V, and account for the 19 W draw plus 700 mA bus current when sizing the power supply. Use the SUB-D9 connector for the CANopen trunk, and set the node address and baud rate before power-up. Add TM2 expansion modules only after confirming the base configuration works.
Maintenance and Lifecycle Planning
Check terminal torque and connector seating every six months. Inspect relay contacts more often in high-cycle applications, since they are the main wear point. Keep ambient humidity between 10% and 95% non-condensing, and store spare units from -25…+70 °C. Because the product is discontinued, verify current lifecycle status and availability with SpareTechPLC before ordering. Building a small buffer stock protects uptime while you plan the TM3 migration.
Compatibility and Integration
The OTB1CODM9LP speaks CANopen as a slave over its SUB-D9 port. It integrates with CANopen masters from Schneider and other vendors that support standard slave profiles. No further communication expansion exists on this NIM variant — the network choice is fixed at CANopen. If your master runs EtherNet/IP or Modbus, you need a different NIM or the newer TM3 platform.
What to Verify Before You Buy
Confirm your master uses CANopen and can address this slave. Check that 12 inputs and 8 outputs cover your point count, or plan for TM2 expansion. Match the 24 V DC supply and 19 W load to your panel budget. Finally, decide whether to stock spares or migrate. SpareTechPLC supplies tested industrial automation parts and can advise on both options.
Frequently Asked Questions
Is the OTB1CODM9LP still in production?
No. Schneider Electric lists it as discontinued. The suggested replacement is the TM3BCEIP bus coupler with TM3 distributed I/O.
Can I use it without a CANopen master?
No. It operates only as a CANopen slave, so a compatible master must control it.
How many expansion modules does it accept?
Up to 7 TM2 expansion modules can attach to the base unit.
What are the solid-state outputs rated for?
The 2 PNP solid-state outputs handle 0.3 A each, while the 6 relay outputs handle 2 A each.
Does it have analog channels?
No. The module provides digital I/O only, with no analog inputs or outputs.
