This product is no longer available and has been replaced by: NL201.
NL100 Network Link Interface
Services Available
Repair No
Calibration No
Free Support No


Campbell Scientific’s NL100 allows our data loggers to communicate over a local area network or a dedicated Internet connection via TCP/IP. This 10baseT Ethernet interface is compatible with all of our data loggers and can be connected to either the data logger’s CS I/O port or RS-232 port. In certain configurations, the NL100 may be compatible with Modbus systems (contact Campbell Scientific for details).

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Benefits and Features

  • Compatible with most Campbell Scientific data loggers
  • Connects a data logger to a network
  • Supported by PC400 and LoggerNet


Detailed Description

The NL100 mounts directly to an enclosure backplate. It may be located several miles from the data logger by using another communications device such as short-haul modems, RF modems, or the MD485 multidrop interface.

PC400, LoggerNet, and RTDAQ soft ware packages support the NL100. Typically, the interface is configured using our Device Configuration utility (DevConfig), which is bundled in PC400, LoggerNet, and RTDAQ. DevConfig can also be downloaded, at no charge, from Customers may change the NL100’s settings via TCP/IP, once the interface has a working IP address (complete instructions are provided in the NL100 Operators Manual).

Each NL100 requires a static IP address. Please request assignment of static IP addresses from your network administrator prior to NL100 purchase—especially if your organization uses servers running DHCP protocol.


Power Requirements 12 Vdc (supplied via 13947 wall charger or data logger‘s 12 Vdc power supply)
Typical Current Drain ~140 mA (continuous)
Operating Temperature -25° to +50°C
Dimensions 23.6 x 10.9 x 2.5 cm (9.3 x 4.3 x 1.0 in.) with mounts
Weight 363 g (13 oz)

Communication Rate

RS-232 DTE Port Up to 115.2 kbps
RS-485 and CS I/O Ports Up to 38.4 kbps

EMI and ESD Protection

European Standards Meets requirements for a class A device under European Standards.
Application of Council Directive(s) 89/336/EEC as amended by 89/336/EEC and 93/68/EEC
Standards to Which Conformity Is Declared EN55022-1; 1995 and EN50082-1: 1992


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR211X (retired)
CR216X (retired)
CR23X (retired)
CR295X (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR800 (retired)
CR850 (retired)
CR9000 (retired)

Mounting Equipment

Product Compatible Note
ENC10/12 If using the RS-232 port, the NL100 must be mounted flat to fit in an ENC10/12, ENC10/12R, or ENC12/14.
ENC10/12R If using the RS-232 port, the NL100 must be mounted flat to fit in an ENC10/12, ENC10/12R, or ENC12/14.
ENC12/14 If using the RS-232 port, the NL100 must be mounted flat to fit in an ENC10/12, ENC10/12R, or ENC12/14.

Additional Compatibility Information

Modbus Systems

For Modbus systems, Campbell Scientific recommends the NL115 or NL120 instead of the NL100. However, the NL100 may be used in some Modbus systems. Please contact Campbell Scientific for configuration requirements.

Data Logger Considerations

Because the CR9000X includes an on-board Ethernet port, an Ethernet interface is not required.

Enclosure Considerations

The NL100 requires a desiccated, non-condensing environment. A Campbell Scientific enclosure is recommended when the interface is in the field. The NL100 has built-in keyhole flanges for mounting to an enclosure backplate.


NL100 Firmware v.10 (770 KB) 11-23-2011

Current NL100 firmware. Requires the Device Configuration Utility and a 9-pin female to female NULL modem cable.

View Update History

Device Configuration Utility v.2.29 (54 MB) 11-15-2023

A software utility used to download operating systems and set up Campbell Scientific hardware. Also will update PakBus Graph and the Network Planner if they have been installed previously by another Campbell Scientific software package.

Supported Operating Systems:

Windows 11 or 10 (Both 32 and 64 bit)

View Update History

Frequently Asked Questions

Number of FAQs related to NL100: 2

  1. No. NL100 OS version 7 does not allow the specification of the telnet port. It is fixed to telnet port 23.
  2. Follow these steps:

    1. Using the Device Configuration Utility, access the terminal mode by selecting Unknown in the Device Type column.
    2. Select the correct communications port for the computer (that is, the COM port that connects the null modem cable to the RS-232 port of the NL100).
    3. Set the baud rate to 115200.
    4. Disconnect the power to the NL100.
    5. Click the Connect button to open the terminal screen.
    6. Hold down the Enter key on the computer keyboard.
    7. Connect the power to the NL100.
    8. Type in VER at the resulting terminal mode prompt, and click the Enter key. The MAC address is provided.

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