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

These displays can provide control, alarms, and/or retransmission of measured data with field-installable options for relay or transistor outputs, SSR controls, analog retransmission signals, and communications in Modbus RTU, RS485 or RS232 ASCII protocols. All circuits are isolated for reliable performance and protection.

The LDB series features a full NEMA 4 (IP65) metallic housing, designed to be panel mounted, wall mounted or suspended. The front keypad allows for easy configuration, and an optional remote keypad is also available.

The front lens is made from anti-reflective tinted methacrylate, which provides a sharp and clear reading at long distances. Additionally, 5 levels of LED brightness allow for adjustments to suit most environments.

Specifications

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 -200ºC (1472 to -328ºF)

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: 1º

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: mm.ss, hh.mm, dd.hh, ssss, sss.s, ss.ss, mmmm, mmm.m, mm.mm, hhhh, hhh.h, hh.hh
• 6-Digit: mm.ss.cc, hh.mm.ss, dd.hh.mm, mmmm.ss, hhhh.mm, dddd.hh, ssssss, sssss.s, ssss.ss, mmmmmm, mmmmm.m, mmmm.mm, 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)