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The ALM-Horn-MRTU-BR unit has a water clear upper cover, Blue + Red LED, Modbus RTU communication.
The ALM-Horn device includes 1-channel digital input for any dry contact output such as SA, BA, FA..etc, and 1-channel digital output. Each device has 4 kinds of alarm tone, NC/NO input mode select by switchs. The ALM-Horn-MRTU support Modbus protocol, which makes perfect integration for monitoring or control in SCADA software, HMI Modbus & Utilities. ALM-Horn series have a High Sound Pressure output, wide input power range & IP43 waterproofing.