Desktop Weight Indicator for Industrial and Legal-for-Trade Applications

The Laumas WTAB-R is a compact desk-mount weight indicator ideal for industrial weighing, pre-pack checks, and legal-for-trade weight control. Featuring a 6-digit red LED display, intuitive 8-key keypad, and 16 status LEDs, it offers fast, accurate readouts and operator feedback. It supports up to 8 load cells with 4/6 wire configuration and includes advanced features like peak value detection, weight totalisation, piece counting, and pre-set tare. With flexible connectivity including RS485, USB, Ethernet, WiFi and fieldbus protocol support, the WTAB-R integrates seamlessly with automation systems, printers, PLCs and remote displays.

Key Features

• Display: 6-digit 20 mm red LED alphanumeric display with 16 status LEDs
• Keyboard: 8-key tactile front panel
• Mounting: ABS desktop housing with IP40 protection (315x170x135 mm)
• Load Cell Support: Up to 8 (350 Ω) with 4 or 6 wire connection
• Inputs/Outputs: 5 relay outputs, 3 opto-isolated digital inputs, optional 16-bit analog output
• Ports: RS232/RS485, optional USB, CANopen, Modbus TCP, Profibus DP, Profinet IO, Ethernet/IP
• Calibration: Real or theoretical with 8-point linearisation
• Weighing Modes: Gross/net, totalisation, preset tare, peak weight, piece counting
• Power Supply: 12–24 VDC standard, optional 12.2 V rechargeable battery
• Real-Time Clock: Built-in with buffer battery for traceability and batch records

Main Functions

• Remote display and printer compatibility via RS485/RS232
• Connection to PLCs or other instruments via digital I/O and analog output
• 12 programmable setpoints for automation or selector switches
• Advanced digital filtering for stable weighing under motion
• Real-time statistical control of pre-packaged goods
• Data logging, value printing and ID entry via keyboard or PC
• WiFi and TCP/IP module options for web remote control and data monitoring
• 9 tare values and 5 preset tares stored in memory

Certifications

• OIML R76, CE, UKCA, UL, EAC, NMI (Australia), GOST (Russia), NTEP (USA)
• Certified for legal-for-trade use in UK, EU, Australia, USA, Russia, and more
• Complies with MID, EN45501, Handbook 44, and Chinese metrology regulations

Interfaces & Expansion Options

• Analog Output: 16-bit programmable module (OPZW1ANALOGICA)
• RS485 Expansion: Additional serial communication port (OPZW1RS485)
• WiFi Module: Remote supervision and management via web server (OPZWRADIOTAB)
• USB Data Logging: Export weighing data with support for keyboard and barcode input (OPZWUSBD89)
• Fieldbus Protocols: Modbus TCP, CANopen, Profinet IO, DeviceNet, Ethernet/IP, Profibus DP
• Alibi Memory: Legal-for-trade data storage (OPZWALIBI)

Accessories & Mounting Options

• Optional integrated thermal printer with paper feed and sensor (OPZWPRTABSTA)
• Standard and adhesive thermal paper rolls (CARTASTAVP / CARTASFACADEN)
• 12.2 V backup battery (OPZWBATTWTAB) for portable weighing systems

Downloads & Resources