GSM/3G/4G LTE AC/DC Power Voltage Monitor — Power Failure Alarm with SMS Alerts, Modbus TCP & RTU

Operate and check status from any location with no distance limitation. This GSM/3G/4G LTE AC/DC power monitoring alarm avoids inquiry call fees by rejecting an authorized caller and returning the onsite power voltage on the first 'ring'. It’s suitable for monitoring power status, solar panels and DC voltage. Supports Modbus TCP and Modbus RTU for integration. Allows up to 10 authorized phone numbers: 5 can be set to receive calls or SMS, and 5 can both call and send SMS when an alarm occurs. Includes one 12DC output for triggering a siren or controlling other DC outputs.