DC motor controllers over 10A

EM-282D-JS1 DC-Motor Controller with Modbus RS485

Key Features

Full-bridge DC motor starter for joystick-controlled applications
Adjustable acceleration and deceleration ramps for smooth motion
Current limit adjustment for motor protection and end-stop function
Two selectable speeds with separate forward and reverse ranges
Automatic joystick calibration for forward, reverse and midpoint
Selectable NPN or PNP logic for limit inputs
Start-kick function to prevent motor jamming
Integrated RS-485 Modbus RTU for external control & monitoring

Overview

EM-282D-JS1 is a high-current full-bridge DC motor starter designed for joystick-operated motion control systems. It includes adjustable ramps for smooth starts and stops, and an adjustable current limit for overload protection or use as an electronic end-stop.

The control input stage is specifically designed for joystick operation. When the calibration function is activated, the device automatically detects joystick forward, reverse and midpoint positions.

The FAULT terminal works as both input and output: normally high, driven low on overtemperature or conditional current trip. Pulling the FAULT line low externally stops the motor and prevents restart. Multiple EM-282D-JS1 units can be linked to create a synchronous stop system.

Special Functions

Start-kick for increasing torque when starting under heavy load or risk of jamming
Configurable input logic — each limit input can be NPN or PNP
Braking output for external resistor or magnetic brake control

Modbus Communication

This D-version includes an integrated RS-485 serial port supporting the Modbus RTU protocol. This enables remote control of speed, direction, ramp times, current limit and monitoring of operational values.

Parameter Setting and Monitoring

Parameter setting can be done using EM interface units. Devices such as the EM-236 or EM-328 (with EmenTool Lite software) enable complete configuration and monitoring of motor current, limits, speeds and functional states.

Technical Data EM-282D-JS1

Supply voltage nominal	12–48 VDC (limits 10–60 V)
Shutdown voltage	10 V
Overvoltage limit (adjustable)	15–60 V
Idle current	typ. 20 mA
Motor current capability
Continuous (24 V, 25°C)	100 A
Continuous (24 V, 60°C) with fan	80–100 A
Note	Motor currents ≈20% lower at 16 kHz PWM
Note	Motor currents ≈15% lower at 48 V supply
Braking load current (pin 16)	50 A cont., 100 A peak
Current limit adjustable	1–200 A
Note	Current limit is boosted +20% during start ramp
Overtemperature limit	100 °C
Start / stop ramp	adjustable 0–5 s
PWM frequency	2 kHz / 16 kHz
Joystick input scale	0–5 V or 0–10 V (DIP 1 = ON)
Input logic levels	High = 4–30 V / Low = 0–1 V
Control input impedance	typ. 10 kΩ
Control input response time	typ. 5 ms
Fault output	NPN open collector max 42 V / 0.5 A
Fault input activation	Uin < 1 V (NPN, 100 kΩ pull-up)
RS-485 bus	Half-duplex, Modbus RTU, 9.6 / 19.2 kbps
Motor & supply connectors	16 mm²
Control connectors	1 mm²
Dimensions	180 × 122 × 60 mm
CE testing	Industrial environment (EMC approved)
Operating temperature (Ta)	−40 … +60 °C
Weight	750 g