Large Displays Panel or Wall Mount, NEMA 4 Metal Enclosure

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

Model	P	T	C1	CR	RTU	232	485
Main Function	PROCESS METER	TEMPERATURE METER (4 digit only)	COUNTER, RATEMETER, PERIODMETER	CLOCK, CHRONOMETER, TIMER	MODBUS RTU	RS-232 ASCII REPEATER	RS-485 ASCII REPEATER
Ranges	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
Digit Height	60mm (2.36”) or 100mm (4”)
Sensor Excitation Voltage	5 to 20Vdc (max. 35mA)	-	5 to 18Vdc (max. 70mA)	5 to 18Vdc (max. 70mA)	-	-	-
Power High	85 to 265 Vac; 120-370 Vdc (isolated 2,500 Vac)
Power Low	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
Env. Protection	Full IP65 (NEMA 4) housing
Configuration	Front Keypad (Optional remote control)
Mounting	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)