MNM MyScale MS720 Dual-Connector Pallet Beam Scale Indicator Guide

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Call MNM Scales at (832) 290-3120 or email mnmscales@yahoo.com for help confirming that this is the correct dual-input replacement indicator for your pallet beam/load-bar system.

MNM MyScale MS720 Dual-Connector Pallet Beam Scale Indicator Guide

The MNM MyScale MS720 dual-connector indicator is a replacement LCD weighing indicator specifically listed for OP-919 pallet beam scales and MyScale/load-bar systems. The exact product page states that this version has two load-cell connectors on the back, includes AC power, uses a rechargeable battery, and is intended to be ordered as a replacement indicator rather than a generic one-input display.

What the dual-input MS720 is designed to do

Pallet beam scales commonly use two load bars, so this MS720 version gives the system two physical load-cell inputs. MNM lists gross, tare, preset tare, zero, multiple Hold modes, accumulation, animal weighing, checkweighing and counting. Full-duplex RS-232 can connect to a remote display or printer when the connected device and communication settings are compatible.

Published indicator specifications

MNM publishes a 1-inch backlit LCD, lb/kg selection, gravity adjustment, 4 V rechargeable battery, AC 100–250 V power, approximately 7.87 x 2.95 x 7.17 inch indicator dimensions, 6000e/30,000d-class accuracy language and 50 ms conversion time. The listing also gives general MS720 electronics information about supporting multiple 350 Ω load cells; that is an electrical capability statement and should not be read as meaning this exact enclosure has eight physical rear connectors—the product specifically says it has two inputs.

Replacement checklist before ordering

Confirm the old indicator is part of an OP-919/MyScale pallet-beam or compatible two-input load-bar system. Compare both rear connectors, excitation/signal wiring, capacity/division requirements, power supply, mounting arrangement and any RS-232 equipment. A connector that physically fits is not proof of pinout compatibility. If the original indicator or beams were rewired, document the existing connections before swapping hardware.

Setup after replacement

Place both load bars on a stable, level surface, inspect cables and connectors, connect both inputs with power off, then power the indicator. Confirm unloaded zero, load each beam individually to identify gross imbalance, and test a known load centered across the pair. Capacity, division, zero and span must match the specific scale system before weighing results are trusted.

Calibration and service caution

MNM's public product page does not provide a verified button-by-button MS720 dual-input service calibration menu. Do not copy OP-901, LP7515 or another indicator's sequence. The correct workflow is to verify mechanics and both beam inputs, configure the system for the intended capacity/division, perform unloaded zero and known-load span using the exact MS720 procedure supplied for the unit, then check repeatability and off-center loading. Contact MNM for exact service-menu instructions when they are not supplied with the replacement.

Common problems

If only one beam responds, swap diagnostic attention to the cable/connector and that input before assuming the indicator is defective. If the reading changes when cables move, inspect connectors and cable jackets. If the scale reads roughly half or double, verify whether both inputs are active and whether capacity/calibration matches the pair. If Hold behaves unexpectedly, verify the selected Hold/animal-weighing mode rather than treating it as a load-cell fault.

MNM product URL: https://mnmscales.com/product/myscale-ms720-lcd-indicator-with-dual-connectors-for-pallet-beam-scale-load-bars/