Lauer LCA Busline 320 Controller Module i01457

General Description

The Lauer LCA Busline 320 (also identified by i01457 and T5) is a compact, modular industrial controller designed for distributed automation applications. Part of the LCA Busline series, this module combines a powerful logic engine with a built‑in fieldbus interface and a scalable I/O system. It is ideal for machine‑side control, remote I/O handling, and as a slave node in larger control networks. The robust DIN‑rail housing and wide ambient temperature range make it suitable for harsh factory floor conditions.

Processor and Memory

The controller is equipped with a 32‑bit ARM Cortex‑M3 processor running at 72 MHz, with 256 KB of flash memory for firmware and user application, and 64 KB of SRAM. A battery‑backed SRAM (32 KB) retains retentive data (counters, timers, and process values) during power loss. The real‑time clock (RTC) is powered by a replaceable coin cell and provides time‑stamping for events. The module supports up to 1024 logic blocks (functions, function blocks, and steps) in the user program, with a typical cycle time of 1‑2 ms.

Integrated I/O and Expansion

The Busline 320 includes on‑board digital and analog I/O: 8 digital inputs (24 V DC, sink/source), 8 digital outputs (24 V DC, 0.5 A, protected), and 2 analog inputs (0‑10 V or 4‑20 mA, 12‑bit). For additional I/O, the module supports the LAUER Busline expansion bus, which allows connection of up to 8 remote I/O modules (digital, analog, and temperature) over a twisted‑pair cable (max 100 m). The expansion bus is automatically detected and configured by the system software.

Fieldbus and Communication

• Primary Interface: Profibus DP (slave) via a 9‑pin D‑sub connector – supports DP‑V0 and DP‑V1.

• Secondary Interface: RS‑232 (programming and diagnostics) or RS‑485 (Modbus RTU) – jumper‑selectable.

• Ethernet (optional): Modbus TCP and LAUER Service Protocol via a plug‑in module.

• CANopen (optional): For connection to drive controllers and sensors.

Technical Specifications

• Power Supply: 24 V DC ±20 %, 300 mA (plus load on outputs)

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

• Storage Temperature: –25 °C to +70 °C

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

• Housing: Polyamide, UL94 V‑0, width 45 mm, height 100 mm, depth 75 mm

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

• Protection Rating: IP20 (requires enclosure for IP54 environments)

• Weight: 0.3 kg

Programming Environment

The LCA Busline 320 is programmed using the LAUER LogicBuilder software, which supports the IEC 61131‑3 languages: Ladder Diagram (LD), Function Block Diagram (FBD), Structured Text (ST), and Sequential Function Chart (SFC). The software includes a built‑in simulator and an online monitor for debugging. The user program is downloaded via the RS‑232 port (programming cable) or over the fieldbus (if supported). The software also allows configuration of the fieldbus parameters (slave address, I/O mapping, and diagnostic profiles).

Installation and Commissioning

Snap the controller onto the DIN rail. Connect the power supply (two‑pin terminal block) with 0.75‑1.5 mm² wires. For Profibus DP, use a standard Profibus cable and connect to the 9‑pin D‑sub. Set the slave address using the rotary switch on the front. For the expansion bus, connect the modules in a daisy‑chain using shielded twisted‑pair cable. After wiring, apply power – the green LED (PWR) lights up. If the red LED (ERR) flashes, check the bus configuration. Download the user program from LogicBuilder; the controller will start executing the logic. Monitor the I/O status via the software or through the fieldbus master.

Diagnostics and Maintenance

The controller provides a comprehensive diagnostic system: a front‑panel LED indicates the operating state (RUN, STOP, ERROR). The error history (last 20 events) is stored in non‑volatile memory and can be read via the software. Regular inspection of the power supply voltage and the bus cable is recommended. The internal battery (CR2032) for the RTC and retentive memory should be replaced every 5 years. The module is not user‑repairable; in case of hardware failure, replace the entire unit. Ensure that the new unit is configured with the same address and program.

Compatibility and Variants

The LCA Busline 320 is compatible with all LAUER LCA programming tools and with standard Profibus DP masters. The variant i01457 (T5) specifies a specific firmware version with extended temperature range and enhanced ESD protection. For applications requiring more I/O, the Busline 360 offers additional on‑board channels. When ordering, specify the part number LCA‑320‑i01457 to ensure correct hardware revision.