EKI-1221D 1-port Modbus Gateway with Integrated Ethernet Cascading

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EKI-1221DThe EKI-1200 series Modbus gateways are bi-directional gateways for integrating new and existing Modbus/RTU and Modbus/ASCII serial devices to newer TCP/IP networked-based devices. The EKI-1221D features two Ethernet ports with one IP address for easier network wiring. One port can be used to connect to the network, and the other port can be used to connect to another Ethernet device or another EKI-1221D. This device provides a simple and cost-effective way to bring the advantage of remote management and data accessibility to thousand of devices that can not connect to a network. The EKI-1221D provides a feature that can allow users to select master or slave operation mode for each serial port. They not only allow an Ethernet master to control serial slaves, but also allow serial masters to control Ethernet slaves.



Ethernet Communications

 • CompatabilityIEEE 802.3, IEEE802.3u
• Speed10/100 Mbps
• No. of Ports2
• Port Connector8-pin RJ-45
• ProtectionBuilt-in 1.5KV magnetic isolation

Serial Communications

 • Port TypeSoftware selectable RS-232/422/485 port
• ConnectorsD-sub 9 male
• Protection15kV ESD protection for all signals
• Data Bits7 or 8
• Stop Bits1 or 2
• ParityNone, Even, Odd, Space or Mark
• Baud Rate50 bps to 921.6 kbps
• Serial SignalsRS-232: TxD, RxD, DTR, DSR, RTS, CTS, DCD, RI, GND
RS-422: TxD+, TxD-, RxD+, RxD-, GND
RS-485: Data+, Data-, GND


 • OS SupportWindows2000/XP/Vista
• Utility SoftwareAdvantech Serial Device Server Configuration Utility
• Operation ModesModbus RTU Master/Slave mode
Modbus ASCII Master/Slave mode


 • LED IndicatorsSystem: Power, System Status
LAN: Speed, Link/Active
Serial: Tx, Rx
• Reboot TriggerBuilt-in WDT (watchdog timer)


 • Dimensions37 x 140 x 95 mm (W x H x D)
• EnclosureMetal with solid mounting hardware
• Weight580g
• MountingDIN-rail, Panel

Power Requirements

 • Input Voltage12 ~ 48 V⊂DC, redundant dual inputs
• Power ConnectorScrew Terminal Block
• Power Consumption2W


 • Operating Temperature-10 ~ 60°C
• Storage Temperature-20 ~ 80°C
• Operating Humidity5 ~ 95% RH