NPort 6650 Secure Terminal Server, RS432/422/485, 16 Port

Part #: M NPORT 6650-16

16-port RS-232/422/485 to Ethernet secure terminal server, 100-240 VAC input
  • Overview
  • Specifications
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  • Overview

8, 16, and 32-port RS-232/422/485 rackmount terminal servers

Features and Benefits

  • Up to 32 ports for high density environments
  • Non-standard baudrates supported with high precision
  • Port buffers for storing serial data when the Ethernet is off-line
  • Supports IPv6
  • Ethernet redundancy (STP/RSTP/Turbo Ring) with network module
  • Modular design for scalability
  • DES/3DES/AES for highly secure data transmissions


The NPort® 6600 series of secure device servers is the right choice for applications that use large numbers of serial devices packed into a small space. Security breaches are intolerable and the NPort® 6600 ensures data transmission integrity with support of EDS, 3DES, and AES encryption algorithms. Serial devices of any type can be connected to the NPort® 6600, and each serial port on the NPort® can be configured independently for RS-232, RS-422, or RS-485 transmission.

LCD Panel Makes Configuration Easy

The NPort® 6600 has a built-in LCD panel for configuration. The panel displays the server name, serial number, and IP address, and any of the device server’s configuration parametres, such as IP address, netmask, and gateway address, can be updated easily and quickly.

Note: The LCD panel is only available with standard temperature models.

Adjustable Resistor Values for RS-485 Communication

The NPort® 6600 provides adjustable termination, pull high, and pull low resistors for RS-485 communication. In some critical environments, termination resistors may be needed to prevent the reflection of serial signals, and the pull high and pull low resistors may need adjusting to maintain the integrity of the electrical signal. Since no set of resistor values works for every environment, the NPort® 6600 allows manual adjustment of the resistor values for each serial port using built-in DIP switches.

  • Specifications
Ethernet Interface
Number of Ports1
Speed10/100 Mbps, auto MDI/MDIX
Connector8-pin RJ45
Magnetic Isolation1.5 kV built-in
Optical Fiber Interface (with network module)
Serial Interface
Number of Ports8, 16, or 32
Serial StandardsNPort 6610: RS-232
NPort 6650: RS-232/422/485
Connector8-pin RJ45
RS-485 Data Direction ControlADDC® (Automatic Data Direction Control)
Serial Line Protection15 kV ESD protection for all signals
Console PortDedicated RS-232 console port on rear panel (8-pin RJ45)
Serial Communication Parametres
Data Bits5, 6, 7, 8
Stop Bits1, 1.5, 2
ParityNone, Even, Odd, Space, Mark
Baudrate50 bps to 921.6 kbps (supports non-standard baudrates)
Pull High/Low Resistor for RS-4851 kΩ, 150 kΩ
Terminator for RS-485120 Ω
Serial Signals
RS-422Tx+, Tx-, Rx+, Rx-, GND
RS-485-4wTx+, Tx-, Rx+, Rx-, GND
RS-485-2wData+, Data-, GND
Memory Expansion Slot
Slot TypeSD socket (supports up to 2 GB)
Network ProtocolsICMP, IPv4/v6, TCP, UDP, DHCP, BOOTP, Telnet, DNS, SNMP V1/V2c/V3, HTTP, SMTP, ARP, PPPoE
Security ProtocolsDES, 3DES, AES, SSH, SSL
Configuration OptionsWeb Console, Serial Console, Telnet Console, Windows Search 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
ManagementSNMP MIB-II
IP RoutingStatic, RIP-I, RIP-II
Operation Modes
StandardReal COM, TCP Server, TCP Client, UDP, Pair Connection, RFC2217, Terminal, Reverse Telnet, Ethernet Modem, Printer, PPP, Disabled
SecureSecure Real COM, Secure TCP Server, Secure TCP Client, Secure Pair Connection, SSH, Reverse SSH
Terminal Sessions8 sessions per port
Physical Characteristics
WeightNPort 6600-8: 3460 g
NPort 6600-16: 3580 g
NPort 6600-32: 3600 g
DimensionsWithout ears: 440 x 195 x 44 mm (17.32 x 7.68 x 1.73 in)
With ears: 480 x 195 x 44 mm (18.9 x 7.68 x 1.73 in)
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 75°C (-40 to 167°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 VoltageAC Models: 100 to 240 VAC
DC Models: ±48 VDC (20 to 72 VDC, -20 to -72 VDC)
Power ConsumptionAC Models: 285 mA @ 100 VAC, 190 mA @ 240 VAC
DC Models: 293 mA @ 48 VDC
Alarm ContactRelay output with current carrying capacity of 1 A @ 24 VDC
Power Line Protection1 kV burst (EN 61000-4-4: EFT/B), 0.5 kV surge (EN 61000-4-5)
Standards and Certifications
SafetyUL 60950-1, EN 60950-1
EMIEN 55022 Class A, FCC Part 15 Subpart B Class A
EMSEN 55024,
EN 61000-4-2 (ESD) Level 2/3,
EN 61000-4-3 (RS) Level 2,
EN 61000-4-4 (EFT) Level 2,
EN 61000-4-5 (Surge) Level 2,
EN 61000-4-6 (CS) Level 2,
EN 61000-4-8 Level 1,
EN 61000-4-11
FreefallIEC-68-2-6, IEC-68-2-34, IEC-68-2-32
VibrationIEC-68-2-6, IEC-68-2-34
Green ProductRoHS, CRoHS, WEEE
Alert ToolsBuilt-in buzzer and RTC (real-time clock)
Automatic Reboot TriggerBuilt-in WDT (watchdog timer)
MTBF (mean time between failures)NPort 6610-8: 135,891 hrs
NPort 6610-16: 102,373 hrs
NPort 6610-32: 68,707 hrs
NPort 6650-8: 135,370 hrs
NPort 6650-16: 101,783 hrs
NPort 6650-32: 68,177 hrs
Warranty Period5 years
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