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.
OMEGA LDB Series Large Displays for Industrial Applications
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.
Available Models and Features
TEMPERATURE METER (4 digit only)
COUNTER, RATEMETER, PERIODMETER
CLOCK, CHRONOMETER, TIMER
RS-232 ASCII REPEATER
RS-485 ASCII REPEATER
0/10Vdc 4/20mA ±10Vdc ±20mA
Pt100 (2 and 3 wires) Thermocouples J, K, T, E, S, R, N, C
Pulse counter up to 250 kHz Ratemeter up to 500 kHz Period up to 1000 sec.
Hours, minutes, seconds, tenths and cents of second Hour or decimal format
Modbus RTU protocol
RS-232 ASCII protocol
RS-485 ASCII protocol
60mm (2.36”) or 100mm (4”)
Sensor Excitation Voltage
5 to 20Vdc (max. 35mA)
5 to 18Vdc (max. 70mA)
5 to 18Vdc (max. 70mA)
85 to 265 Vac; 120-370 Vdc (isolated 2,500 Vac)
11 to 36?Vdc (isolated 1500?Vdc)
Power Consumption (meter only)
60 mm (2.3”): 4 Digit = 3,0 W, 6 Digit = 3,50 W; 100 mm (4”) 4 Digit =5,25 W, 6 Digit = 5,50 W
Full IP65 (NEMA 4) housing
Front Keypad (Optional remote control)
Panel, wall, suspended
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 ? 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)