Single-phase electric energy meter EM114039-02

DIN railresidentialprepaid

energy prepayment, currency prepayment, post-paid mode… LoRaWAN & TTL Communication, Modbus protocol. frequency band EU868MHz,AS923MHz US915MHz... class C, Activation way:OTAA. CE-MID Compliant, Module B+D,Glue Stick Antenna or Suction Antenna Optional It's really compact and small if we compare it with a suspension Lorawan meter or Lorawan meter with ct It's offers strong signal as external antenna. which easures the transmission of data 2. Class A\ Class B\ Class C: Class C devices extend Class A capabilities by keeping the receive windows open unless transmitting an uplink, as shown in the figure below. Therefore, Class C devices can receive downlink messages at almost any time, thus having very low latency for downlinks. These downlink messages can be used to activate certain functions of a device, such as reducing the brightness of a street light or turning on the cut-off valve of a water meter. Class C devices open two receive windows, RX1 and RX2, similar to Class A. However, the RX2 receive window remains open until the next uplink transmission. After the device sends an uplink, a short RX2 receive window opens, followed by a short RX1 receive window, and then the continuous RX2 receive window opens. This RX2 receive window remains open until the next uplink is scheduled. Uplinks are sent when there is no downlink in progress. Compared to Class A and Class B devices, Class C devices have the lowest latency. However, they consume more power due to the need for opening continuous receive slots. As a result, these devices cannot be operated with batteries for long time therefore they are often mains powered.