This product is no longer available and has been replaced by: NL201. Some accessories, replacement parts, or services may still be available.
NL100 Network Link Interface
Services Available
Repair Yes
Calibration No
Free Support Yes


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



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


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Data Loggers

Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200X (retired)
CR206X (retired)
CR23X (retired)
CR295X (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR9000 (retired)

Mounting Equipment

Compatible Note

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.

Related Documents


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

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

View Revision History

Device Configuration Utility v.2.24 (42.8 MB) 24-06-2020

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 10, 8.1, 8, and 7 (Both 32 and 64 bit)

View Revision History

FAQs for

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.