Lauer LCA320.0 Industrial Controller

General Description

The Lauer LCA320.0 is a compact, DIN‑rail‑mountable industrial controller designed for small to medium automation applications. It offers a balance of processing power, integrated I/O, and communication flexibility, making it suitable for machine control, conveyor systems, and auxiliary process management. The unit is programmed using the LAUER LCA LogicBuilder software, supporting standard IEC 61131‑3 languages.

Processor and Memory

The LCA320.0 is powered by a 16‑bit microcontroller (Infineon C167) running at 40 MHz, with 128 KB of flash memory for the user program and 32 KB of SRAM. An additional 8 KB of non‑volatile EEPROM stores retentive data (counters, timers, and setpoints) without battery backup. The real‑time clock is powered by a supercapacitor (up to 30 days of retention) and can be optionally equipped with a battery for longer backup.

Integrated I/O Configuration

• Digital Inputs: 12 channels, 24 V DC (sink/source), optically isolated, with filter times (1‑10 ms) configurable.

• Digital Outputs: 8 channels, 24 V DC, 0.5 A each, short‑circuit and over‑temperature protected, with status LEDs.

• Analog Inputs: 2 channels, 0‑10 V or 0‑20 mA (software‑selectable), 10‑bit resolution.

• High‑Speed Counters: 2 channels, up to 10 kHz, for encoder or pulse counting.

Communication Interfaces

The controller provides a RS‑232 port (9‑pin D‑sub) for programming and connection to a PC or operator panel. A second port (RS‑485) supports Modbus RTU master/slave for connection to drives, sensors, and other controllers. An optional Profibus DP slave module can be plugged into the expansion slot on the side. The unit also includes a CANopen interface (optional) for integration with motion control networks.

Technical Specifications

• Power Supply: 24 V DC ±20 %, 250 mA (plus output load)

• Operating Temperature: –10 °C to +55 °C

• Storage Temperature: –20 °C to +70 °C

• Humidity: 5 – 95 % RH (non‑condensing)

• Housing: Polycarbonate, UL94 V‑0, width 71 mm, height 90 mm, depth 62 mm

• Mounting: DIN rail (EN 50022) – snap‑on with locking tab

• Protection: IP20

• Weight: 0.2 kg

Programming and Configuration

The LCA320.0 is programmed using LAUER LogicBuilder (version 2.0 or higher). The software supports Ladder Diagram (LD), Function Block Diagram (FBD), and Structured Text (ST). The user creates a project, defines variables, and writes the logic. The program is downloaded via the RS‑232 port using a standard null‑modem cable. LogicBuilder includes an online monitor that displays the real‑time status of inputs, outputs, and internal variables. For easy commissioning, the software has a “quick start” wizard that configures the basic I/O and communication settings.

Installation and Wiring

Snap the controller onto the DIN rail. Connect the 24 V power supply to the top terminal block (two‑pin) – observe polarity. Wire the digital inputs to the screw terminals (use 0.5‑1.0 mm² wires). For analog inputs, use shielded twisted‑pair cables and connect the shield to the ground terminal. Connect the RS‑232 programming cable to the 9‑pin D‑sub. If using RS‑485, connect A, B, and GND to the appropriate terminals. After wiring, apply power – the green POWER LED will illuminate. Download the user program; the controller will start executing. Use the RUN/STOP switch on the front to control execution.

Diagnostics and Maintenance

The controller features a built‑in self‑test that checks the memory and I/O at power‑up. Faults are indicated by a red ERROR LED with a flash code (e.g., 2 flashes = RAM error, 3 flashes = program missing). A diagnostic log is stored in the EEPROM and can be read via LogicBuilder. The supercapacitor for the RTC has a typical life of 10 years; if time‑stamping is critical, replace the supercapacitor or add a battery. Regular inspection of the wiring and terminal tightness is recommended. In case of hardware failure, replace the unit with an identical LCA320.0; the program can be downloaded from the backup file.

Compatibility and Variants

The LCA320.0 is compatible with all LAUER LCA expansions and with Modbus‑capable devices. Variants include LCA320.1 with more analog inputs and LCA320.2 with Profibus DP built‑in. When ordering, specify the part number LCA320.0 for the standard model. Accessories include programming cables, mounting clips, and dust covers.