This product is no longer available and has been replaced by: NL201. Some accessories, replacement parts, or services may still be available.
NL200 Network Link Interface
Services Available


Campbell Scientific's NL200 is a powerful network link interface that provides a wired Ethernet network connection to dataloggers and peripherals. It allows our dataloggers, as well as other serial devices, to communicate over a local area network or a dedicated Internet connection. Additionally, the NL200 supports sophisticated networking capabilities, especially when used in PakBus networks with PakBus devices. For example, with the NL200, multiple PakBus clients can be connected to a single datalogger at the same time. Read More

Benefits and Features

  • Low power consumption
  • Three year extended warranty available on this product


Related Products

Technical Description

The NL200 Network Link Interface allows Campbell Scientific dataloggers to communicate over a local area network or a dedicated Internet connection. This Ethernet interface can be connected to either the datalogger’s CS I/O port or RS-232 port.

The NL200 Network Link Interface is a device used to communicate with Campbell Scientific dataloggers and peripherals using an Ethernet 10/100 Mbps communications link. The NL200 includes a CS I/O port and a RS-232 port for communication. A USB device port is used for configuring the NL200 device.

The NL200 can be configured to bridge Ethernet and CS I/O communications allowing access to the internal IP functionality of the CR800/850, CR1000, and CR3000 (e.g., web page access, email, FTP). Alternatively, the NL200 can be configured to act as a Serial Server and/or a PakBus Router. Additionally, the NL200 can act as TLS Proxy Server.


Power Connector DC Barrel
Power Requirements 7 to 20 Vdc (not powered via CS I/O or USB)
Operating Temperature Range -25° to +50°C
  • Device Configuration Utility over USB or Ethernet
  • Telnet console over Ethernet
CS I/O Port SDC 7, 8, 10, or 11 (does not support ME)
RS-232 Port DTE
USB Port Micro-B
Ethernet Port IEEE 802.3, Auto-MDIX, IPv4, TCP, DHCP, Ping, Telnet, TLS, PakBus
  • RoHS
  • Magnetic Isolation, ESD and Surge tested
  • Meets requirements for a Class B device under European standards.
Application of Council Directive(s) 2004/108/EC
Standards to Which Conformity Is Declared EN61326-1;2006
Connections/Routes Supported
  • Supports 50 simultaneous TCP connections.
  • Up to 10 of the 50 TCP connections can be used for TLS.
  • PakBus Router supports 50 routes.
Dimensions 16 x 6.73 x 2.54 cm (6.3 x 2.65 x 1 in.)
Weight 177 g (6.3 oz)

Current Drain

Active 50 mA (@ 13 Vdc)
Forced Standby 2 mA (available when using Ethernet-to-CS I/O Bridge Mode)

Communication Rate

RS-232 DTE Port 1200 to 115.2k bps
CS I/O Port 9600 to 460.8k bps
Ethernet 10/100 Mbps


Data Logger Considerations

Data Logger Serial Server PakBus Router Bridge Mode
CR200(X) Series
CR9000X *

data loggers


* Although compatible, the CR9000X does not need an Ethernet interface because it has an on-board Ethernet port.
** It is possible to use an NL200 to connect to a mixed-array data logger (e.g., CR10, CR10X, CR23X, 21X, CR7) by using an SC32B between the data logger's CS I/O port and the NL200's RS-232 port.


NL200 / NL201 Firmware v.10.03 (571 KB) 04-09-2018

Current NL200 / NL201 firmware. Requires the Device Configuration Utility and a USB micro cable.

Note: When updating to OS 10.03 from OS 6 or previous, settings will be reinitialized to factory defaults. When updating to OS 10.03 from OS 7, settings will be retained.

View Revision History

FAQs for

Number of FAQs related to NL200: 1

  1. The maximum recommended segment length (length of cable between the NL device and the Ethernet repeater, hub, switch, or router it is connected to) for 10Base-T and 100Base-Tx networks using CAT5e cable is 100 m. 

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