https://ipc2u.com/articles/product-reviews/nport-8-32-port-device-servers-overview-and-selection-guide/
04:43 07.05.2021
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NPort 8-32-port device servers: overview and selection guide


Even today, industry often presents specialists with a task to connect several devices with COM ports to a computer. But modern PCs have don’t have that many COM ports; also, it is not always convenient to have cables connecting the devices to the computer running through the entire facility. A solution to this issue may be the use of devices that convert COM interfaces to Ethernet. A virtual COM port will be created on the PC through the driver, as if it were built into the motherboard. These converters are called device servers or serial interface servers.

NPort and their operation modes description

NPort are serial interface servers designed for connecting RS-232, RS-422 and RS-485 devices to an Ethernet network.
One of the main operation modes of NPort is RealCOM, which creates a "virtual COM port" on a PC. This allows the PC to communicate with RS-232/422/485 devices as if they were connected to a real, physical COM port.
It is also possible to work without creating a virtual COM port in the TCP Server, TCP Client and UDP modes. The PC will immediately access the COM ports through the IP address and TCP port.
In Reverse Telnet mode, you can connect end devices via Telnet, for example, to configurate switches via console port.

List of NPort operating modes for COM ports:

Mode Description
Real COM After driver installation, a virtual COM port appears on the computer. The driver connects to NPort
Reverse Real COM NPort will connect to PC with static IP
RFC 2217 Similar to Real COM, but RFC2217 standard is used
TCP Server NPort is waiting for a connection from TCP Client
TCP Client NPort establishes a connection to TCP Server
UDP mode Does not require establishing a connection, supports multicast, but does not guarantee data delivery
Printer mode Mode for connecting a printer with a COM port via LPD/LPR protocol
Dial-up access Allows you to forward Ethernet through the COM port. Using this mode is typically not recommended because of configuration issues
Pair Connection Allows you to forward the COM port over Ethernet
Ethernet Modem Emulates AT command modem operation by transferring data over Ethernet
Terminal ASCII Allows to establish up to 8 sessions per port. Used for text terminals with no file transfer or encryption capability
Terminal BIN Supports file transfer but only establishes one session per port
SSH Supports encryption, only one session per port is established
Reverse SSH Allows you to connect devices via a secure SSH connection
Reverse Telnet Used to connect devices supporting carriage return and line feed characters to console ports via Telnet

Brief description of the features of different series of NPort multiport device servers

NPort series COM ports total Feature
5600 8,16 General purpose, rack mount
5600-8-DT 8 8 ports, compact design, RJ-45, DB9 Male, 2xLAN switch, 2 power inputs, display
5600-8-DTL 8 8 ports, compact design, DB9 Male, 1xLAN, 1 power-in
6000 8, 16, 32 Supports SSL/SSH encryption of transmitted data, supports IPv6 and IP routing
CN2500 8, 16 RS-232 interfaces terminal server, IP routing, security protocols, no Web interface
CN2600 8, 16 RS-232/422/485 interfaces terminal server, IP routing, security protocols, with WEB-interface, with two independent Ethernet ports and 2 MAC addresses, redundant power supply
S9000 8, 16 Designed for electric power sector, built-in 4xLAN managed switch, RSTP, Turbo Chain, Turbo Ring redundancy, Modbus TCP Server (Slave) gateway, DNP3 TCP Outstation, IEEE 1588v2 PTP (hardware-based) and IEC 61850 support

NPort hardware comparison

Model name 5600 5600-8-DT 5600-8-DTL 6000 CN2500 CN2600 S9000
COM ports total 8, 16 8 8 8, 16, 32 8, 16 8, 16 8, 16
COM ports by type RS-232,
RS-422,
RS-485
RS-232,
RS-422,
RS-485
RS-232,
RS-422,
RS-485
RS-232,
RS-422,
RS-485
RS-232 RS-232,
RS-422,
RS-485
RS-232,
RS-422,
RS-485
COM connector RJ-45 RJ-45,
DB9 Male*
DB9 Male RJ-45 RJ-45 RJ-45,
DB9 Male*
DB9 male,
DB9 female,
fiber optic
СОМ port isolation Yes* Yes* Yes* Yes
Web interface Yes Yes Yes Yes Yes* Yes
Display Yes* Yes Yes* Yes Yes
LAN 1, 1 IP 2, 1 IP 1, 1 IP 1-3*, 1 IP 1, 1 IP 2, 2 IP 4, 4 IP
Fiber optic Yes* Yes* Yes*
Mounting Rackmount Desktop, DIN-rail Desktop, DIN-rail Rackmount Rackmount Rackmount Rackmount
Data encryption Yes, SSH, SSL
Security HTTPS, SSL, SSH HTTPS, SSL, SSH HTTPS, SSL, SSH HTTPS, SSL, SSH RADIUS, TACACS+ RADIUS, PAP, CHAP HTTPS, SSL, SSH RADIUS, PAP, CHAP HTTPS, SSL, SSH RADIUS, TACACS+
Routing Static Routing, RIP V1/V2 Static Routing, RIP V1/V2 Static Routing, RIP V1/V2
100-240 VAC-in power Yes* Yes* Yes* Yes* Yes*
12-48 VDC-in power Yes Yes
20-72 VDC-in power Yes* Yes* Yes*
88-300 VDC-in power Yes* Yes* Yes* Yes*
Operational temperature range 0...55°С,
-40...+85C*
0...55°С,
-40...+75C*
0...60°С,
-40...+75C*
0...55°С,
-40...+85C*
0...55°С 0...55°С,
-40...+85C*
-40...+85C
Specification 5600 5600-8-DT 5600-8-DTL 6000 CN2500 CN2600 S9000

* not available in some models.

NPort comparison by COM modes

Mode 5600 5600-8-DT 5600-8-DTL 6000 CN2500 CN2600 S9000
Real COM Yes Yes Yes Yes Yes Yes Yes
Reverse Real COM Yes
RFC 2217 Yes Yes Yes Yes Yes Yes
TCP Server Yes Yes Yes Yes Yes Yes Yes
TCP Client Yes Yes Yes Yes Yes Yes Yes
UDP mode Yes Yes Yes Yes Yes Yes Yes
Printer modes Yes Yes Yes*
Dial-up access Yes Yes Yes Yes*
Pair Connection Yes Yes Yes Yes
Ethernet Modem Yes Yes
Terminal ASCII Yes Yes Yes
Terminal BIN Yes Yes Yes
SSH Yes
Reverse SSH Yes
Reverse Telnet Yes Yes Yes Yes Yes Yes

NPort differences can be summarized in the following characteristics:

  • NPort 5600 is mostly geared towards solving issues of connecting COM devices via Ethernet. The series is rack-mountable and has up to 16 COM ports
  • If you need a compact device with 8 COM ports, then NPort 5600-8-DT or NPort 5600-8-DTL are a good choice
  • NPort 6000 supports SSL/SSH data encryption over Ethernet and has up to 32 COM ports
  • NPort CN2500 series can only work with RS-232 and supports terminal operation modes
  • NPort CN2600 series is a logical evolution of NPort CN2500, adding morecapabilities, as well as two independent Ethernet ports (2 IP) and redundant power
  • NPort S9000 is specially designed for power industry applications and has a built-in managed switch

Find NPort in our product catalog


For further technical information, inquiries about offers or placement of orders, please contact our sales team at sales@ipc2u.com

https://ipc2u.com/articles/product-reviews/nport-8-32-port-device-servers-overview-and-selection-guide/
04:43 07.05.2021