Lauer P090b/L033/02a Interface Module
The Lauer P090b/L033/02a is a versatile interface module designed to simplify wiring and expand I/O capabilities in distributed control systems. It combines power distribution, digital input/output channels, and analog signal conditioning in a single DIN-rail mountable unit. This module is ideal for small- to medium-sized automation projects where space efficiency and cost-effectiveness are key, offering reliable connectivity to sensors, actuators, and controllers.
Technical Specifications
Input Power: 24 V DC (18–30 V), total current capacity 2.5 A.
Digital Inputs: 8 x 24 V DC, opto-isolated, filter time 3 ms, sink/source selectable.
Digital Outputs: 8 x 24 V DC, 0.5 A each, short-circuit and overload protected, with diagnostic feedback.
Analog Inputs: 2 x 0–10 V or 0–20 mA, 12-bit resolution, software configurable.
Analog Outputs: 1 x 0–10 V or 4–20 mA, 12-bit.
Communication: 1 x RS485 (Modbus RTU), optional CANopen.
Diagnostics: LED per channel, power LED, and bus status LED.
Operating Temperature: -10 °C to +55 °C.
Storage Temperature: -20 °C to +70 °C.
Humidity: 10% to 90% non-condensing.
Protection: IP20.
Mounting: DIN rail (35 mm).
Dimensions: 110 x 80 x 55 mm.
Weight: 0.4 kg.
Terminals: Spring-clamp or screw (variant dependent).
Functional Features
The P090b/L033/02a includes an integrated microcontroller that handles signal processing, scaling, filtering, and communication. The analog inputs can be configured for different sensor types via software, and the digital outputs feature short-circuit protection with automatic reset. The module supports up to 247 nodes on the RS485 bus using Modbus RTU. The optional CANopen interface allows integration into higher-level fieldbus networks. It also includes a real-time clock for timestamping events and a data log buffer for up to 2,000 entries.
Configuration is performed using a PC-based tool that sets I/O mapping, baud rate, and node address. The module can be monitored and controlled remotely via the communication interface.
Installation Guidelines
Mount the module on a 35 mm DIN rail. Connect the 24 V DC power supply with a 2 A fuse. Wire digital inputs and outputs to the terminal blocks using 0.5–1.5 mm² wires. For analog signals, use shielded twisted-pair cables and connect the shield to the earth terminal. For RS485, use a shielded cable with termination resistors (120 Ω) at both ends. Set the node address and baud rate via DIP switches. For CANopen, follow standard wiring practices.
Ensure proper grounding and avoid running signal cables parallel to power cables to minimize interference. Provide adequate ventilation; the module is passively cooled.
Operating Conditions
This module is designed for indoor industrial use in pollution degree 2 environments. Ambient temperature range is -10 to +55 °C, with humidity up to 90% non-condensing. Vibration tolerance is 0.5 g (10–150 Hz) and shock 10 g (11 ms). The module is fanless and has no moving parts, ensuring high reliability.
Applications
Typical applications include remote I/O for conveyor systems, packaging machinery, small process control, sensor data acquisition, and building automation. It is also used as an expansion module for PLC systems.
Compliance and Certifications
CE marked, UL 61010-1 certified, and RoHS compliant. Meets EN 61000-6-2 (immunity) and EN 61000-6-4 (emission) standards.
Ordering Variants
Available with different analog input ranges (0–5 V, 4–20 mA only), with or without CAN interface, and with varying numbers of I/O channels. Extended temperature range (-20 °C to +60 °C) option available.
