Data Logger Comet U6841M – IoT Wireless Datalogger for 3 Current Inputs 0-20mA and 1 Two-state input, with Built-in GSM modem

• A solution for every need, every budget – economy and premium dataloggers
• High quality, accurate and stable sensors
• Built-in battery operated
• Built-in printer

GSM datalogger is designed to record 3 current inputs and 1 binary input. In case of exceeded set limits, SMS and JSON messages can be sent via GPRS data connection. Measured values can be sent to the internet storage COMET Cloud, which is complete monitoring, alarm, and analysis system. It is also possible to set the regular sending of JSON messages to COMET Database, the sending interval is adjustable.

Alarms are also indicated locally by LED, LCD, and acoustically by built-in beeper. The recording is performed in non-volatile electronic memory. The data can be transferred to a PC via included USB-C cable. GSM recorder includes a Traceable calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.

Datalogger with 3 inputs 0 – 20 mA and 1 binary input

This model is used to measure up to three signals from current loops (0 to 20) mA DC while allowing one binary input to be monitored. The current inputs are passive and are not galvanically separated from one another. This means that the connected sensors cannot be connected to the current loop and the negative terminals («-«) are connected to each other. These facts must be taken into consideration when designing the device into the circuit. Incorrect connections may cause degradation of the measured values.

Connection Mode: For the procedure for connecting wires to the connecting block refer to Annex 4.

Standard outputs (4 to 20) mA can also be measured with current inputs without any problems. Binary input serves to monitor voltage signals or signals coming from a voltage-free contact. The binary input changes are registered immediately, irrespectively of the recording interval setting. To safe record the input status, the signal must be present for at least 1 s. Unlike the U0843M model, this input can capture connected/ disconnected voltage status. Input signals are connected to a connecting block. The device’s ingress protection is IP 20. Due to its low ingress protection, the device is not suitable for use in dusty rooms or rooms exposed to water ingress. The maximum length of the input wires should not exceed 30 m. It is recommended to use shielded cables.