NL201 Network Link Interface

The NL201 Network Link Interface is a serial to ethernet communication peripheral that connects to any Campbell datalogger via the RS232 or CSI/O port.

The device allows any Campbell datalogger with an RS-232 or CS I/O port to communicate with a computer using TCP/IP, making it possible to communicate over a local area network or a dedicated Internet connection.


  • Communicates over a local area network or dedicated Internet via TCP/IP
  • Low power 7-20 VDC; Current drain when Active @ 13 Vdc: 50 mA
  • Connects to datalogger's RS-232 or CS I/O port
  • Compatible with all of the contemporary dataloggers as well as most retired dataloggers (e.g., 21X, CR23X, CR500)


Connections/Routes Supported

  • Supports 20 simultaneous TCP connections
  • Up to 10 of the 20 TCP connections can be used for TLS
  • PakBus Router supports 50 routes
  • Maximum number of Modbus Server Transactions: 15



  • Weight: 177g 
  • Dimensions: 16 x 6.73 x 2.54 cm
  • Operating Temperature Range: -25° to +50°C (extended range available)
  • Ethernet Port: 10Base-T and 100Base-TX (full and half duplex), Auto-MDIX, Auto-IP (APIPA), IPv4, IPv6, ICMP/Ping, ICMPv6/Ping, TCP, DHCP Client, SLAAC, DNS Client, HTTPS Proxy, Telnet Server, TLS, PakBus, Mobus TCP/IP


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