Product Overview: The TM218LDA40DR2HN Compact Logic Controller
For decades, machine builders relied on hard-wired relay panels to sequence their production lines. As those panels grew, so did the wiring, the footprint, and the troubleshooting time. The TM218LDA40DR2HN from Schneider Electric represents the next step in that evolution: a compact logic controller that consolidates 40 I/O points, Ethernet connectivity, and analog outputs into a single DIN-rail unit. Part of the Modicon M218 series, this controller is engineered for precise, repeatable control of small to mid-size machines.
However, note that the TM218LDA40DR2HN is discontinued. Schneider Electric recommends the Modicon M221 as its replacement. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
TM218LDA40DR2HN Key Features and Technical Specifications
- Digital Inputs: 24 total (20 regular 24 Vdc plus 4 fast HSC at 10 kHz).
- Digital Outputs: 16 relay outputs rated at 2 A per point.
- Analog Outputs: 2 channels, 0-10 Vdc.
- Supply Voltage: 100...240 V AC, 50/60 Hz.
- Power Consumption: 34 W.
- Memory: 1 MB Flash for program and data backup; 1 MB RAM for application execution.
- Communication: 1× Ethernet RJ45, 2× RS-485, 1× mini USB-B.
- Expansion: Up to 7 TM2 modules, maximum 248 I/O.
The relay outputs are a distinctive feature. Because they are mechanical contacts, they can switch both AC and DC loads directly, which simplifies wiring and reduces the need for external interposing relays. This engineering-grade precision in I/O design helps machine builders save panel space and cost.
Communication and Integration
The TM218LDA40DR2HN includes built-in Modbus TCP on Ethernet and Modbus RTU/ASCII on RS-485. These protocols allow the controller to exchange data with HMIs, drives, and other controllers without additional hardware. For fieldbus networks such as CANopen or Profibus, a communication cartridge slot (TMCOM series) is available. Integration Note: wiring into such networks may require an external gateway or connection module. Confirm cables and gateways with AutoDCSTech before installation.
Typical Applications
This controller suits packaging machines, small assembly stations, and material handling equipment. Its 40 I/O points and analog outputs make it ideal for controlling variable-speed drives or proportional valves. In a conveyor application, for example, the high-speed counters can read encoder pulses while the relay outputs control motor starters. The Ethernet port then links the machine to a plant network for production monitoring.
Installation and Maintenance
Mount the TM218LDA40DR2HN on a DIN rail inside an enclosure rated IP20 or better. Ensure the operating temperature stays between 0 and +55 °C and humidity remains below 95% non-condensing. Because the unit is self-powered, no backplane bus current is required. For maintenance, inspect relay contacts periodically if they switch inductive loads. Always follow Schneider Electric's safety manual for any service.
Product Support and Availability
Contact AutoDCSTech with your exact requirements for precise matching. We provide specialist engineering support for legacy Schneider Electric controllers.
Availability & Condition at AutoDCSTech
| Part Number | TM218LDA40DR2HN |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | France |
