DM43 – Modbus RTU Digital I/O over RS485/USB

4 x DI, 3 x DO
RS485 + USB (VCOM) interface control

Overview & DiagramSpecificationsOrdering InformationInquiryDownload

Modbus RTU commands over RS485 / USB to get Digital Input Status and trigger Digital Output Controller

USB + RS485 both interface control
Act as a Modbus Slave device receiving command from Modbus Master
Support 4 Digital Inputs and 3 Digital Outputs
Utility support for configuration

CPU : 8 bits CPU
RAM : 2 KB SDRAM
ROM : 32 KB Flash ROM

Serial Interface (for control DIO)
Port Type : 1 x RS485 2-pin Terminal Block
Speed : 9600 bps ~ 115.2 Kbps
Parity : None , Odd , Even
Data Bit : 8
Stop Bit : 1 , 2
Protection : RS485 Surge Protection

USB Interface (for control DIO)
Port Type : 1 x USB Virtual COM port
Chipset : FTDI

Operating Temperature : -10°C ~ 70°C
Storage Temperature : -15°C ~ 75°C
Operating Humidity : 10% ~ 95% non-condensing
Storage Humidity : 5% ~ 95% non-condensing

Software Features
Protocol : Modbus RTU
OS supported : Windows 10
Configuration : Utility for Windows

Digital I/O
Digital Input : 4 (active High / Low selectable)
Digital Output : 3 (active High / Low selectable)
DO x 3 : Relay output, 125V AC@0.5A, 30V DC@1A
DI x 4 : 3000 VDC Isolation Protect
Wet contact
Logic level 0 : 0 ~ 2 V
Logic level 1 : 5 ~ 20 V
Dry contact
Logic level 0 : close to GND
Logic level 1 : open

Power Input
DC 5~24V, 100mA@ 12VDC
USB bus Power 5V@300mA

Regulatory Approval
FCC Part15 Class A
CE EN55022 Class A, EN55024
RoHS Compliance

Hardware Warranty 1 Year

Product specifications are subject to change without prior notice

Model Description
DM43 Modbus RTU Digital I/O over RS485
DM43U Modbus RTU Digital I/O over RS485 / USB

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    Downloads

    File Description File size
    pdf DM43 / DM43U catalog DM43 / DM43U Specifications - Modbus RTU DIO over RS485/USB
    220 KB
    pdf MODBUS RTU Protocol for 4DI4DO DM43 / DM43U Modbus RTU protocol
    68 KB
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