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Moxa NE-4120S

PART #: M NE-4120S Series

Device server module for RS-232 devices, supports 10/100BaseT(x) with 5-pin Ethernet pin header

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Device server module for RS-232 devices, supports 10/100BaseT(x) with 5-pin Ethernet pin header

Features and Benefits

  • 10/100 Mbps Ethernet interface
  • Up to 230.4 kbps baudrate support
  • Choice of operation modes: Real COM, TCP Server, TCP Client, and UDP
  • DHCP, BootP, Static IP, and ARP supported
  • SNMP and e-mail alerts for event trapping and notification
  • Half the size of a credit card—only 57 × 40 mm
  • Low power consumption at 1.5W, with single +5V input


Moxa’s NE-4100 embedded device servers are designed for manufacturers who want to add sophisticated network connectivity to their serial devices. Moxa’s embedded device servers can be used to convert any device with a standard serial interface to an Ethernet-enabled device in no time. The NE-4100 embedded device servers support 10/100 Mbps Ethernet, and provide ready-to-use operation modes, including TCP Server, TCP Client, and UDP. In addition, a Real COM driver is included for backward compatibility with legacy software.

SNMP and E-mail Alerts for Event Trap and Notification

NE-4100 embedded device servers can be configured to send an SNMP trap or e-mail under the following conditions:
‧Cold/warm start
‧Password authentication failure
‧Change in DSR/DCD line signal
‧Change in IP address
‧Change in password

Form Factor
TypeReady-to-go pin header modules
Dimensions57 × 40 mm (2.24 x 1.57 in)
Weight20 g
Ethernet Interface
Number of Ports1
Speed10/100 Mbps, auto MDI/MDIX
Magnetic Isolation Protection1.5 kV built-in
Connector5-pin pin header
Serial Interface
Number of Ports2
Serial Standards• Port 1:RS-232
• Port 2:TTL console port
RS-485 Data Direction ControlADDC® (automatic data direction control)
Serial Communication Parametres
Data Bits5, 6, 7, 8
Stop Bits1, 1.5, 2
ParityNone, Even, Odd, Space, Mark
Flow ControlDSR/DTR and RTS/CTS (RS-232 only), XON/XOFF
Baudrate110 bps to 230.4 kbps
Serial Signals
• Port 2: TxD, RxD, GND
RS-422Tx+, Tx-, Rx+, Rx-, GND
RS-485-4wTx+, Tx-, Rx+, Rx-, GND
RS-485-2wData+, Data-, GND
Digital I/O Pins
GPIO4 programmable I/O pins
Network ProtocolsICMP, ARP, IPv4, TCP, UDP, DHCP, Telnet, HTTP, SNMP V1/V2c, SMTP
Configuration OptionsWeb Console, Serial Console, Telnet Console, Windows Utility
Windows Real COM DriversWindows 95/98/ME/NT/2000, Windows XP/2003/Vista/2008/7/8/8.1 (x86/x64), Windows 2008 R2/2012/2012 R2 (x64), Windows Embedded CE 5.0/6.0, Windows XP Embedded
Fixed TTY DriversSCO Unix, SCO OpenServer, UnixWare 7, QNX 4.25, QNX 6, Solaris 10, FreeBSD, AIX 5.x, HP-UX 11i, Mac OS X
Linux Real TTY DriversLinux 2.4.x, 2.6.x, 3.x
Operation ModesReal COM, TCP Server, TCP Client, UDP
Environmental Limits
Operating TemperatureStandard Models: 0 to 55°C (32 to 131°F)
Wide Temp. Models: -40 to 75°C (-40 to 167°F)
Storage Temperature-40 to 60°C (-40 to 140°F)
Ambient Relative Humidity5 to 95% (non-condensing)
AltitudeUp to 2000 m
NotePlease contact Moxa if you require products guaranteed to function properly at higher altitudes.
Power Requirements
Input Voltage5 VDC (±5%)
Power Consumption290 mA @ 5 VDC max.
Standards and Certifications
EMIEN 55022 Class B, FCC Part 15 Subpart B Class A
EMSEN 55024,
EN 61000-4-2 (ESD),
EN 61000-4-3 (RS),
EN 61000-4-4 (EFT),
EN 61000-4-5 (Surge),
EN 61000-4-6 (CS),
EN 61000-4-8,
EN 61000-4-11
Green ProductRoHS, CRoHS, WEEE
Automatic Reboot TriggerBuilt-in WDT (watchdog timer)
MTBF (mean time between failures)289,573 hrs
Warranty Period5 years