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LG8 digital display

Product catalog summary

Product Overview
The LG8 Intelligent Digital Display is a versatile device with multiple signal input capabilities, upper and lower limit alarm functions with LED display, and multiple current and voltage signal outputs. It retains parameter settings even when powered off.

Technical Specifications
The device features a dual highlighted LED nixie tube digital display and analog percentage display. It supports various thermal couple types (e.g., B, S, K, E, T, J, R, N, F2, Wre3-25, Wre5-26) and thermal resistance types (e.g., Cu50, Cu53, Cu100, Pt100, BA1, BA2). It handles direct voltage and current inputs with specified resistance requirements.

Control and Alarm Output
The device includes LED indicators for control/alarm output conditions, with optional switch types and relay contact outputs. It supports various output capacities for different control methods.

Communication Interface
Standard serial bidirectional communication interfaces include RS485 and RS232, with a communication protocol based on Modbus RTU. It supports a miniature serial printer with specified baud rates.

Power and Environmental Specifications
The device operates on AC/DC power with specified voltage and frequency ranges, and it has low power consumption. It functions within a temperature range of 0-50°C and humidity of 10-90% RH, avoiding corrosive substances.

Features
Includes digital setting methods, alarm features for input circuit issues, and robust EMC compliance. It has a single-channel sampling period of 500ms and high compression and insulating strength.

Select Instruction
The document provides a detailed input signal table and display instrument codes for selecting the appropriate configuration. It includes options for input types, output signals, alarm output quantities, feed output, and power configurations.

Example Configuration
An example configuration is provided as LG8-D55K121PA, illustrating the selection of various features and specifications.

Catalog excerpts

Intelligent Digital Display 智能型压力变送器选型表及附图 Multiple signal input Upper and lower limit alarm function, LED alarm display Multiple current and voltage signal output Permanent preservation of parameters setting even no power Technical speciﬁcations Display Nixie tube Dual highlighted LED nixie tube digital display Light cross Analog display the percentage of measuring value Thermal couple Thermal resistance Liner resistance Remote resistance Direct voltage Direct voltage 0-5V、1-5V、0-10V、0-5V square root、1-5V square root； input resistance ≥510KΩ Direct current 0-20mA、0-10mA、4-20mA、0-10mA square root、4-20mA square root；input resistance ≥250Ω Control/alarm output Indicator The LED indicator light on under control/alarm output condition Control/alarm switch output, switch types are optional ALM relay contacts output, contact rating: AC220V/0.5A (small) DC24v/0.5a (small) (resistive load) AC220V/2A (big) DC24V/2A (big)(resistive load) ACR(K3/K6)—SCR zero trigger pulse output, capacity: AC400V/0.5A SSR(K4)— Solid-state relay control voltage output, capacity: DC12V/30mA SOT(K5)— Bidirectional controlled silicon on-oﬀ output, capacity: AC400V/7A Transmitting output Direct voltage DC 1-5V load resistance≥250KΩ (optional big resistance module, load resistance≥4KΩ) Direct voltage DC 0-5V load resistance≥250KΩ (optional big resistance module, load resistance≥5KΩ)

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