COMET Logger U6841M - GSM data logger for 3 current inputs 0-20mA and 1 two-state input with modem

U6841M - GSM data logger for 3 current inputs 0-20mA and 1 two-state input with modem
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 connection may cause degradation of the measured values. 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 using 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.