---
product_id: 105192323
title: "2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router"
brand: "longs motor"
price: "HK$734"
currency: HKD
in_stock: true
reviews_count: 1
url: https://www.desertcart.hk/products/105192323-2-phase-stepper-motor-driver-dm542a-1-0-4-2a
store_origin: HK
region: Hong Kong
---

# 18-50V DC power range High-speed photoelectric isolation Max 4.2A output current 2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router

**Brand:** longs motor
**Price:** HK$734
**Availability:** ✅ In Stock

## Summary

> ⚙️ Drive Your CNC Like a Pro – Precision Meets Power!

## Quick Answers

- **What is this?** 2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router by longs motor
- **How much does it cost?** HK$734 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/105192323-2-phase-stepper-motor-driver-dm542a-1-0-4-2a)

## Best For

- longs motor enthusiasts

## Why This Product

- Trusted longs motor brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Perform:** Reliable H-bridge bipolar constant phase flow driver for smooth, accurate motion
- • **Power Your Precision:** Supports a wide 18-50V DC input for versatile CNC setups
- • **Unleash Maximum Torque:** Delivers up to 4.2A output current for robust motor control
- • **Universal Compatibility:** Optimized for 2-phase stepper motors (42 & 57 types) with multiple wiring options
- • **Signal Integrity Secured:** High-speed photoelectric isolation ensures noise-free input signals

## Overview

The DM542A is a high-performance 2-phase stepper motor driver designed for CNC routers, supporting 18-50V DC input and delivering up to 4.2A output current. Featuring high-speed photoelectric isolation for signal clarity and compatibility with 42 and 57 type stepper motors, it ensures precise, reliable motion control in demanding industrial applications.

## Description

Features:High performance, low priceAverage current control, 2-phase sinusoidal output current driveSupply voltage from 18VDC to 50VDCOpto-isolated signal I/OOvervoltage, under voltage, overcorrect, phase short circuit protection15 channels subdivision and automatic idle-current reduction8 channels output phase current settingOffline command input terminalMotor torque is related with speed, but not related with step/revolutionHigh start speedHigh hording torque under high speed

## Features

- *18V-50V DC power supply.
- *H-bridge bipolar constant phase flow driver.
- *The maximum output current is 4.2A .
- *The input signal high-speed photoelectric isolatio.
- *For step motor: 42, 57 type 2 phase 4 phase (4 / 6 / 8 line).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Operating Temperature | 6E+1 Degrees Celsius |
| Manufacturer | longs motor |
| Item Weight | 13.9 ounces |
| Package Dimensions | 13.46 x 5.83 x 3.78 inches |
| Is Discontinued By Manufacturer | No |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Color:** Black
- **Brand:** Longs Motor
- **Voltage:** 18 Volts
- **Material:** Copper
- **Display Type:** LCD or LED

## Images

![2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router - Image 1](https://m.media-amazon.com/images/I/813qhb9dhyL.jpg)
![2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router - Image 2](https://m.media-amazon.com/images/I/71+7c0GSkOL.jpg)
![2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router - Image 3](https://m.media-amazon.com/images/I/71SwSz3oL-L.jpg)
![2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router - Image 4](https://m.media-amazon.com/images/I/616m5mvLcCL.jpg)
![2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router - Image 5](https://m.media-amazon.com/images/I/71mYmW-0bvL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Direct replacement
*by B***G on July 31, 2019*

Couldn't get less expensive units to work. This plugged and played.

## Frequently Bought Together

- Longs Motor 2-Phase Stepper motor driver DM542A 1.0-4.2A 18-50VDC for CNC Router
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**Shop now:** [https://www.desertcart.hk/products/105192323-2-phase-stepper-motor-driver-dm542a-1-0-4-2a](https://www.desertcart.hk/products/105192323-2-phase-stepper-motor-driver-dm542a-1-0-4-2a)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-20*