CR350 Measurement and Control Datalogger Description：

Product ManualDatasheet

The CR350 is a multi-purpose, extremely low power, compact measurement and control data logger. This entry-level data logger, with its rich instruction set, can measure most hydrological, meteorological, environmental, and industrial sensors. The CR350 concentrates data, makes it available over varied networks, and delivers it using your preferred protocol. The CR350 also performs automated on-site or remote decision-making for control and M2M communications. This data logger is ideal for small applications requiring long-term, remote monitoring and control.

The following outlines the primary differences between the CR300, CR310, and CR350 dataloggers:

The CR310 and CR350 offer removable connectors.

The CR310 includes a 10/100 Ethernet connection.

The CR350 has two independent RS-232/RS-485 ports and USB-C.

The CR350 includes Wi-Fi, cellular, or the following radio options for different regions:

CR350-RF407: US and Canada

CR350-RF412: Australia and New Zealand

CR350-RF422: Europe

CR350-RF427: Brazil

Benefits and Features

Two dedicated SDI-12 terminals to expand SDI-12 sensor use

Extremely low current requirements

Two dedicated RS-232/RS-485 terminals to support smart sensors or modems

Easy setup with PC software and USB-C connectivity

Ability to measure analog and digital sensors with confidence

Trusted Campbell Scientific quality, including integral surge and ESD protection

Integrated radio option to network wirelessly to another node or Internet gateway

CR350-WIFI ideal for short-range, wireless IP communication

Removable terminal block for easy wiring

Ability to communicate anywhere using built-in cellular or satellite peripherals

Integrated 12 V battery solar charge regulator to charge batteries

Flexibility to connect with PakBus, Modbus, DNP3, GOES, and other standard communication protocols

Multiple general-purpose I/O and programmability to analyze and control measurement acquisition

Event-driven communications and physical outputs for notifications

Detailed Description

The CR350 is a low-powered data logger designed to measure sensors, analyze data, and store data and programs. A battery-backed clock assures accurate timekeeping. The on-board, BASIC-like programming language—common to all Campbell Scientific data loggers—supports data processing and analysis routines.

Terminal Descriptions

Two switched 12 V terminals (SW12V) for powering sensors or communication devices, 2100 mA

Two sensor excitation or continuous 0.15 to 5 V terminals (VX1, VX2) for sensor excitation or output control

Four multipurpose analog input terminals (SE1–SE4)

Analog functions (SE1–SE4)

Analog inputs: 4 single-ended or 2 differential inputs with -100 to +2500 mV and ±34 mV ranges 24 bit ADC

4 to 20 mA or 0 to 20 mA inputs (SE1, SE2 only)

Digital I/O functions (SE1–SE4) consist of 3.3 V logic levels for:

High frequency counter (35 kHz)

Pulse width modulation

Interrupts and timer input

Period average (200 kHz, amplitude dependent)

Two Pulse Counting Terminals (P_SW, P_LL)

P_SW

Switch closure (150 Hz)

High frequency counter (35 kHz)

P_LL

Low level ac (20 kHz)

High frequency counter (20 kHz)

Two Control Terminals (C1, C2): C terminals are software configurable for digital functions

Digital I/O functions consist of 5 V output and 3.3 V input logic levels for:

SDI-12

High frequency counter (3 kHz)

Switch closure (150 Hz)

General status/control voltage source 5 V; 10 mA @ 3.5 V

Interrupts

Serial asynchronous communication Tx/Rx pair

CR350 Measurement and Control Datalogger Specifications：