Posted in | Process Control

Displaying Temperature, Process, Rate and Time


  • Bright 60 or 100 mm (2.3 or 4") red or green digits
  • Full NEMA 4 (IP65) metal enclosure
  • Wall suspension or panel mount
  • Control, alarm and retransmission capability with field installable cards
  • Power options of 85 to 260 Vac and 11 to 36 Vdc. Sensor power built-in where required.
  • Temperature: thermocouples K, T, J, E, R, S, N, C; RTD/Pt100
  • Display of current, max or min values
  • Clock: time, timer with start, stop and reset
  • Remote display: ASCII RS232, RS485, Modbus RTU
  • Process: 4 to 20 mA, 0 to 20 mA, ±10 Vdc, 0 to 10 Vdc
  • Rate, total, count, period: PNP, NPN, Namur, Inductive, TTL, Quadrature


  • Ideal for informing customers and colleagues of key information
  • Time keeping, productivity, targets, output, incident free days
  • Product/piece counting or production rate indication


The LDB Series of large displays offer a wide range of display, measurement and alarm capabilities for all types of commercial and industrial applications. Data is visible by a large audience at distances of up to 50 m (160').

These displays offer the ability to provide control, alarms, and/or retransmission of measured data.  Field-installable options are also available for analog retransmission signals, transistor or relay outputs, SSR controls, as well as communications in Modbus RTU, RS232 or RS485 ASCII protocols. For reliable performance and protection, all circuits are isolated.

The LDB series includes a full NEMA 4 (IP65) metallic housing, and can be wall mounted, panel mounted or suspended. Easy configuration is possible using the front keypad, while an optional remote keypad is also available.

The front lens is made using anti-reflective tinted methacrylate. This allows sharp and clear reading, even at long distances. In addition, adjustments in brightness are possible, with 5 levels of LED brightness available to suit most environments.


  • Display Digits & Range: Six 999999/-199999 or four 9999/-1999
  • Decimal Point: Configurable
  • LED Color: Red standard; Green optional
  • Digit Height: 60 mm (2.36") or 100 mm (4")
  • Operating Temperature: 0 to 50 °C (32 to 122 °F)
  • Storage Temperature: -20 to 70 °C (-4 to 158 °F)
  • Connections: Plug-in screw terminal
  • Signal Wire Diameter: Max. 0.5 mm²
  • Power Wire Diameter: Max. 2.5 mm²
  • Process Meter
  • Signal Ranges: 4 to 20 mA, 0 to 10 Vdc, ±20 mA, ±10 Vdc
  • Excitation Voltage: 20 Vdc, 15 Vdc, 10 Vdc, 5 Vdc (max. 35 mA)
  • Accuracy: 0.05% F.S. ±1 digit
  • Offset Drift: 10 ppm/ºC
  • Span Drift: 25 ppm/ºC (includes offset drift)
  • Read Rate: 15 readings/second
  • Refresh Rate: 15/second
  • Response Time: <120 mSec. (0 to 99% signal)
  • Input impedance: 11 Ohm for mA, 932 k(O) for Vdc
  • Temperature Meter (4-Digit Only)
  • Pt100: 2 or 3 wire
  • Resolution: 1º or 0.1º
  • Measuring Range: 800 to -200 ºC (1472 to -328 ºF)
  • Accuracy: ±0.2º
  • Cable Compensation: Automatic up to 14 Ω
  • Offset Drift: 0.05%
  • Span Drift: 0.10% (includes offset drift)
  • Thermocouples: J, K, T, E, S, R, N, C, L
  • Resolution:
  • Measuring Ranges: See user manual
  • Accuracy: ±2º to ±4º depending on thermocouple type
  • Thermocouple Cold Junction: Automatic (configurable)
  • Offset Drift: 0.05 to 0.2%
  • Span Drift: 0.02 to 0.2% (includes offset drift)
  • Rate, Total Meter
  • Signals Accepted: NPN, PNP, Namur, pick-up, TTL, inductive, mechanical, quadrature
  • Excitation Voltage: 5 Vdc, 9 Vdc, 15 Vdc, 18 Vdc (max. 70 mA)
  • Maximum Vdc at Input Terminals: ±30 Vdc
  • Quartz Accuracy: ±0.01%
  • Thermal Stability: 20 ppm/ºC
  • Display Refresh: 15/second
  • Maximum Frequencies:
    • Counter: up to 250 KHz
    • Rate Meter and Period: meter up to 500 KHz
  • Minimum Frequencies: Rate meter and period meter down to 1 mHz (0.001 Hz)
  • Clock, Timer, Chronometer
  • Reading, Formats:
    • 4-Digit:,, dd.hh, ssss, sss.s,, mmmm, mmm.m,, hhhh, hhh.h, hh.hh
    • 6-Digit:,,,,, dddd.hh, ssssss, sssss.s,, mmmmmm, mmmmm.m,, hhhhhh, hhhhh.h, hhhh.hh (c=1/100 sec, s=sec., m=min., h=hour, d=day)
  • Counting Direction: Up, down
  • Controls: Start, stop, reset
  • Control Activation: Volt-free contact (default), configurable for push-pull, NPN, PNP, inductive
  • Maximum Vdc at Input Terminals: ±30 Vdc
  • Reset Control: Remote, front panel and on alarm
  • Accuracy: 100 ppm
  • Display Refresh: 12/second, reading memory maintained in case of power loss
  • Modbus RTU, RS485, RS232 Meter
  • Common:
    • Speed: 38,400 bps to 600 bps
    • Data Format: 8n1, 8e1, 8o1,8n2, Bus terminator not included, Watchdog configurable from 1 to 120 seconds
  • Modbus RTU:
    • Bus: RS485
    • Function: “slave” for Modbus RTU protocol
    • Addresses: 1 to 247
  • RS485:
    • Protocol: ASCII
    • Bus: RS485
    • Function: Repeater for ASCII code
    • Addresses: 1 to 31
  • RS232:
    • Protocol: ASCII
    • Bus: RS232
    • Function: Repeater for ASCII code
    • Addresses: 1 to 31 (“daisy-chain” connections)

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