Current Loop Display

LPD

DESCRIPTION
Features

Loop-Powered Display

The LPD Current Loop Display is a loop-powered, scalable display designed for 4-20 mA sensor current loops. Ideal for installations near hazardous locations, it provides real-time readings for intrinsically safe devices. Featuring a large, two-line LCD display and a simple three-button interface, the LPD ensures easy operation. Optional Modbus RTU programming allows for quick setup via an RST programming module and APG Modbus software. With IP67 and IP68-rated enclosures, the LPD offers rugged durability in harsh environments.

Efficient Powering: Loop-powered operation with 4-20 mA input and output
Remote Connectivity: RS-485 Modbus RTU connectivity for remote programming
Clear Visibility: 5-digit LCD display with backlight for easy readability
Rugged Protection: Plastic (IP67) or aluminum (IP68) housing for superior protection
Multi-Parameter Monitoring: Displays volume, level, distance, and pressure readings
Rapid Updates: Fast 500 mSec display update rate

Description
Additional information

LPD Datasheet

LPD User Manual

LPD Install Guide

Performance

RS-485 (Modbus RTU): 2400, 9600, 19200, 38400 Baud Rates
Display Readings: Volume, Level, Distance, Pressure
Display Update Rate: 500 mSec
Accuracy: ± 1 Count

Environmental

Protection Rating: IP67, IP68
Storage Temperature: -40° to 160°F (-40° to 71°C)
Operating Temperature: 0° to 160°F (-18° to 71°C)

Electrical

Backlight: Powered From the 4-20 mA Loop
Maximum Voltage Drop: 4.7 VDC Maximum, 4.3 VDC Typical

Programming

Programmable Features:
- User Selectable Units of Measure, Auto-Off
- 3-Button Keypad

Connectivity

Output Options:
- 4-20 mA Loop-Powered Operation
- RS-485
Input: 4-20 mA

Physical

Display: 5 Digit LCD, 0.4 in. Digits, 6 Character Description Field
Plastic Housing:
- Injected Molded Case (EMI-X ® PDX-W-88341)
- Protection Rating: IP67
Metal Housing:
- Aluminum Pressure Die Casting, 0.5% Mg
- Chemically Resistant Paint
- Protection Rating: IP68

Certifications

IP67: Plastic Housing (3.25”)
IP68: Aluminum Housing (3” or 4”)

What is the LPD Current Loop Display?

The LPD Current Loop Display is a loop-powered, scalable display designed for 4-20 mA sensor current loops. It provides real-time readings for intrinsically safe devices, ideal for hazardous locations. It features a large two-line LCD display, simple interface, and optional Modbus RTU programming for easy setup.

How does the LPD display work?

The LPD operates by reading data from 4-20 mA sensor loops and converting it into easy-to-read volume, level, distance, or pressure measurements. It updates every 500 milliseconds for fast, accurate readings.

What is Modbus RTU, and how does it work with the LPD?

Modbus RTU is a communication protocol that allows the LPD to be remotely programmed and monitored. With RS-485 connectivity, it’s perfect for use in installations that require remote monitoring or adjustments. You can configure the display using the optional RST programming module and APG Modbus software.

What types of measurements can the LPD display?

The LPD can display various measurements, including:

Volume
Level
Distance
Pressure

How easy is it to set up the LPD?

The LPD is designed for easy installation and operation. The simple three-button interface allows for straightforward local adjustments, and Modbus RTU programming via the RST module enables quick remote configuration.

OUTPUT	4-20 mA, Modbus
MOUNT	Flange, Flat Bracket Mount, Panel Mount, Rubber Boot Mount, Standoff Bracket Mount
INPUT	4-20 mA
ENCLOSURE PROTECTION	IP67, IP68
INDUSTRY	Chemical, Food & Beverage, Industrial Automation, Marine, Oil & Gas, Water & Wastewater

WARRANTY

APG warrants its products to be free from defects in material and workmanship under normal use and service of the product for 24 months from the date of shipment from APG, unless otherwise specified by APG in writing. Read our full warranty policy HERE.

RETURNS

Returns and allowances must be authorized by APG in advance, which authorization may be granted or withheld by APG in APG’s sole and absolute discretion. Read our full return policy HERE.

Current Loop Display