Lauer Systeme LCA285 / LCA 285.9 Text Display

General Description

The Lauer Systeme LCA285 (also designated LCA 285.9) is a robust alphanumeric text display terminal for industrial operator interface. It provides a large, clear LCD screen and a tactile keypad, enabling operators to view process data, enter parameters, and acknowledge alarms. The unit operates on a 24 V DC supply and is designed for panel mounting in control cabinets.

Display and Keypad

The terminal features a 4‑line by 20‑character LCD with LED backlight and adjustable contrast. The keypad includes 20 keys: numeric block (0‑9), decimal, sign, arrows, Enter, Escape, and three function keys (F1‑F3). Keys are backlit and rated for 500,000 operations. Front overlay IP65.

Communication and Protocols

Two serial ports: RS‑232 (9‑pin) and RS‑485 (screw terminal). Baud rates up to 115200. Supports Modbus RTU (master/slave), LAUER LCA protocol, and ASCII transparent.

Memory and Programmability

256 KB flash stores up to 128 screens, 200 internal registers, and 64 alarms. Battery‑backed RTC. Configured with LAUER LCA‑Config software.

Electrical Specifications

• Supply: 24 V DC ±20 % (19‑33 V), < 200 mA

• Isolation: 500 V

Mechanical Data

• Dimensions: 160 x 96 x 45 mm, cut‑out 138 x 68 mm

• Mounting: Spring clips

• Weight: 0.4 kg

• Temperature: 0‑50 °C

Installation and Maintenance

Mount in cut‑out, connect power and communication cables. Download application. Replace internal battery (CR2032) every 5 years. Clean front overlay.

Troubleshooting

Check communication settings and cable. Reset via software if needed.

Ordering

Model LCA285.9 standard. Available with different backlight colours.