How to Select an HPMONT Elevator Inverter: MONT70/MONT71/MONT72 vs HD5L vs HD3L

When buyers ask for an HPMONT Inverter, the first step is to clarify the required elevator system architecture.

MONT70, MONT71, MONT72, HD5L, and HD3L are not simply different power sizes of the same elevator inverter. They are designed for different levels of elevator control integration, signal transmission, motor feedback, and modernization work.

MONT70, MONT71, and MONT72: The MONT Platform

MONT70 Elevator Integrated Controller

MONT70 is an elevator integrated controller that combines elevator control, motor drive, power electronics, and network communication.

It supports full communication signal transmission using technologies such as CAN and Modbus, provides flexible I/O configuration, and is designed for a wide range of elevator systems. HPMONT also highlights direct-stop technology, Bluetooth debugging, automatic grid-voltage identification, and flexible elevator control functions.

For a new elevator project where the customer wants one integrated platform for car calls, hall calls, door control, drive control, and system communication, MONT70 is usually the strongest general-purpose choice.

MONT71 Parallel Integrated Controller

MONT71 is also an elevator integrated controller, but its main distinction is complete parallel signal transmission, with optional serial communication.

HPMONT states that MONT71 is designed to meet the needs of villa elevators and freight elevators. It provides 24 button I/O interfaces that can support eight-floor full selective control without expansion, making it attractive for projects that use traditional parallel wiring or require straightforward maintenance.

Choose MONT71 when the project needs an integrated controller but prefers parallel signal control rather than a fully communication-based system.

MONT72 Elevator Controller

MONT72 is a new-generation elevator-specific controller based on the MONT platform.

It is compatible with different elevator control systems, supports automatic starting torque compensation for multiple encoder card types, includes a built-in brake unit, and is designed to reduce commissioning work during retrofit projects. It also provides smooth S-curve acceleration and deceleration and frequency-division output.

In practice, MONT72 is a useful choice when the customer wants MONT-platform drive performance but still needs flexible interfacing with an existing or separately designed elevator control system.

HD5L: For Encoder-Based New Drives and Modernization

HD5L is an elevator drive controller, rather than a complete elevator integrated controller.

HPMONT describes HD5L as suitable for new elevator electric drives and for replacing controllers in older elevators. It supports programmable I/O, flexible timing, automatic starting torque compensation with different encoder cards, smooth S-curve acceleration and deceleration, frequency-division output, and a built-in brake unit.

HD5L is usually the better selection when the elevator already has a separate control system and the main requirement is a capable elevator drive controller.

It is especially suitable for elevator modernization projects where encoder feedback, ride comfort, and easier torque adjustment are important. HPMONT also provides encoder card options for HD5L closed-loop vector control applications.

HD3L: For No-Encoder Open-Loop Applications

HD3L is designed for elevator applications without feedback signals.

It uses no-encoder open-loop vector control and provides starting torque of 180% rated torque at 0.5 Hz. It also includes an optimized S-curve and built-in brake unit.

HD3L is the practical choice when the existing elevator does not use an encoder, when the control system is relatively simple, or when the project needs a cost-effective elevator inverter without closed-loop feedback.

It should not be selected for a project that requires encoder-based speed and position control.

The Theoretical Basis for Selection

The correct HPMONT elevator inverter should be selected from the complete system requirements, not only from motor power.

A practical selection rule is:

• Choose MONT70 when the project needs a fully integrated elevator controller with network communication and broad system flexibility.
• Choose MONT71 when the project is a villa or freight elevator and complete parallel signal transmission is preferred.
• Choose MONT72 when the project needs a flexible MONT-platform controller that can work with different elevator control systems and reduce retrofit commissioning work.
• Choose HD5L when the elevator already has a separate controller and requires an encoder-capable drive controller for a new drive or modernization project.
• Choose HD3L when the elevator has no feedback signal and open-loop vector control is sufficient.

Before ordering any HPMONT Inverter, confirm the motor type, rated voltage, rated current, motor power, encoder type, elevator speed, brake resistor requirement, control system architecture, and available cabinet space.

A technically correct selection reduces commissioning time, improves ride comfort, and avoids compatibility problems after installation.