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DMI-A0 Series
2/4 ports Industrial Serial to Ethernet Device Server

0~60°CDevice Server



DMI-A0 Series is a two or four serial ports to two Ethernet ports Industrial serial server, which is an easy and reliable solution for bridging your serial based equipments to the Fast Ethernet networks. The two ports Ethernet can be used to cascade two or more DMI-A0 Series devices, which eliminates the need to connect each device server to an Ethernet switch. The serial ports support RS-232/422/485 or isolated RS-422/485, and the LAN ports support 10/100Base-TX or 100Base fiber optical.

Product Information


● Flexible Serial Ports- Support 2 or 4 ports of RS-232/422/485 or RS-422/485
● Isolation- 2KV isolated RS-422/485
● Dual LAN Ports- Support redundant function
● Fiber Option- Support single-mode and multi-mode fiber optical for both LAN ports
● Flexible Power Input- Including both terminal block and DC jack Latch- DC jack with latch secures higher stability of connection
● Flexible Installation Method- with wall mountable and perpendicular to DIN-Rail design
● Metal housing
● Port Buffering- 64KB port buffer prevents data loss when connection fails
● Warning- Inform user by relay output and E-mail in case of disconnection
● Multiple Operation Mode- Support Real COM, TCP server, TCP client, UDP, Pair Connection




Serial Port: Input:
● Interface: RS-232/422/485 ● Input Voltage: 9 to 36 VDC
● Connector: Power Consumption:
● RJ50 for 4-port RS-232/422/485 ● 800 mA at 12V (max.)
● DB9 for 2-port RS-232/422/485 Connector:
● Terminal Block for isolated RS-422/485 ● Terminal Block or DC Jack with latch
● Line Protection: 15KV ESD


● Isolation: 2KV Casing:
Serial Communication Parameters: ● Aluminum case
● Parity: None, Even, Odd, Space, Mark Dimensions:
● Data Bits: 5, 6, 7, 8 ● 100mm (W) x 125mm (D) x 30mm(H)
● Stop Bit: 1, 1.5, 2 ● (3.94″ (W) x 4.92″ (D) x 1.18″ (H))
● Flow Control: RTS/CTS, Xon/Xoff Weight:
● Speed: 50 bps to 921.6 Kbps ● 0.3kg (0.66 lb)
Ethernet Switch Port: Installation:
● Interface: 10/100Base-TX, 100Base-FX ● DIN-Rail, Wall Mounting
● Connector: RJ45 (10/100Base-TX), SC, ST type (100Base-FX)


● SIsolation: Built-in 1.5KV magnetic isolation Operating Temperature:
Protocols: ● 0℃ to 60℃ (32°F to 140°F)
● ICMP, IP, TCP, UDP, DHCP client, BOOTP Telnet, Rtelnet, DNS, SNMPv2, HTTP, SSH, Reverse SSH, SMTP, SNTP, ARP, RARP, RFC2217 Storage Temperature:
Operation mode: ● -20℃ to 85℃ (-4°F to 185°F)
● Real COM, TCP server, TCP client, UDP, Pair Connection Ambient Relative Humidity:
OS Driver Support: ● 5% to 95% non-condensing
● Windows 2000/XP/2003 COM driver

Regulatory Approvals

Management: Safety:
● Web, Telnet console, SNMP ● CE, VCCI
Port Buffer: Emission Compliance:
● 64K Bytes ● FCC Class A, CE Class A


Order Information
DMI-A0202 2*RS-232/422/485 serial device server with 2*10/100TX
DMI-A0204 4*RS-232/422/485 serial device server with 2*10/100TX
DMI-A0220 2* isolated RS-422/485 serial device server with 2*10/100TX
Type of 100Base-FX:
Designation Typical Distance Nominal Wavelength Cable Type Connector Power Budget
100Base-FX 2 Km 1310 nm 62.5/125 MM ST 15 dB
100Base-FX 2 Km 1310 nm 62.5/125 MM SC 15 dB
100Base-FX 20 Km 1310 nm 10/125 SM ST 19 dB
100Base-FX 20 Km 1310 nm 10/125 SM SC 19 dB
100Base-FX 40 Km 1310 nm 10/125 SM ST 30 dB
100Base-FX 40 Km 1310 nm 10/125 SM SC 30 dB
MM: Multi mode
SM: Single mode
Installation: DIN Rail (mounting kit is included)
Power Connector: Terminal Block