• Input: RS-485 (2-wire, half-duplex) or RS-422 (4-wire, full-duplex) protocol
• Output: RS-485 (2-wire, half-duplex) or RS-422 (4-wire, full-duplex) protocol
• Speed: 115.2K, 57.6K, 38.4K, 19.2K, 9600, 4800, 2400, 1200, 600, 300
• Auto baud rate and data format adjustment
• Isolation Voltage: 2500 Vrms
• Surge protector on communication signals
• Connector: Plug-in screw terminal block
• Power Consumption: 0.7W typical

• Protocol: RS-485 (2-wire, half-duplex) or RS-422 (4-wire, full-duplex) protocol
• Speed: 115.2K, 38.4K, 19.2K, 9600, 4800, 2400, 1200, 600, 300
• Auto baud rate and data format adjustment
• Isolation side: RS-232
• Isolation Voltage: 2500 Vrms
• Surge protector on RS-422/485 communication signals
• Repeater request: Over 128 modules or distance over 4,000 feet
• Connector: Female DB-9 and plug-in screw terminal block
• Power Consumption: 0.75W typical

• Protocol: (DIP switch selectable)
  RS-232 (5-wires) (RXD, TXD, RTS, CTS, GND)
  RS-485 (2-wire) (Data+, Data-)
  RS-422 (4-wire) (TX+, TX-, RX+, RX-)
• Connector: USB B-series male and plug-in screw terminal block
• Speed: 300 ~ 115.2K bps
• Isolation side: USB
• Isolation Voltage: 2500 Vrms
• Fully USB compliant
• Pepeater request: Over 128 modules or distance over 4,000 feet
• Power Consumption: 0.6W typical

• Protocol:
  RS-232 (5-wires) (RXD, TXD, RTS, CTS, GND)
  RS-485 (2-wire) (Data+, Data-)
  RS-422 (4-wire) (TX+, TX-, RX+, RX-)
• Speed: 1200 ~ 115,200 (RS-232 and RS-422/485 can set to different baud rate)
• Convert RS-422/RS-485 to RS-232 with configurable address
• Isolation Voltage: 1000V _DC
• Surge protector on communication signals
• Repeater Request: over 128 modules or 4,000 feet
• Connector: Female DB-9 and plug-in screw terminal block
• Power Consumption: 0.75W typical
• Software compatible with ND-6521

• Input Voltage : 85 ~ 132V ^AC or 170 ~ 264V ^AC, switchable (243U: 90 ~ 264V ^AC, Full Range)
• Input Frequency : 47 ~ 63 Hz
• Input Current : 1.4A (max.)
• Short Protection
• Output Voltage : +24V _DC±10% (243U: +24V _DC 1A, +12V _DC 1A, +5V _DC 3A)
• Output Current : 3A (max.)
• Overload Protection
• Dimensions: 5" (L) x 3.8" (W) x 1.6" (H)
• Operating Temperature : 0° ~ 50°C

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