Monnit Modbus RTU Gateway
The ALTA Serial Modbus Gateway (SMG) acts as a data concentrator for Monnit?s ALTA long range wireless sensor networks. This device allows you to connect up to 50 wireless sensing devices, per gateway, to your existing serial Modbus RS-232C and RS-485 sensing and control infrastructures.
Monnit has recognized the importance of using open standards like Modbus, allowing ALTA wireless sensors to be used in the majority of industrial applications. Modbus is often used to connect a supervisory computer with a remote terminal unit (RTU) in supervisory control and data acquisition (SCADA) systems. Modbus allows for communication between many (approximately 247) devices connected to the same wired network. Therefore, ALTA SMG allows for seemingly unlimited wireless expansion to a traditional wired network.
A system incorporating an ALTA SMG would consists of the following:
Modbus Master PLC, SCADA, etc.
Existing RS-232C or RS-485 Infrastructure
ALTA Serial Modbus Gateway (SMG)
ALTA Wireless Sensors
ALTA EGW4 Gateway Features
Wireless range of 1,200+ feet through 12-14 walls (1)
900 MHz Frequency Hopping Spread Spectrum (FHSS), 868 and 433 MHz Frequency Agile
Best in class interference immunity
Encrypt-RF® Security (Diffie-Hellman Key Exchange +AES-128 CBC for sensor data messages)
16,000 sensor message memory
Over the air updates (future proof)
Communicates with Modbus RTU / ASCII Serial Protocols
Supports RS-232C / RS-485 Interfacing
LED Status Indicators
NEMA 4X / IP65 Rated Enclosure
RP SMA Antenna Connector (Antenna Included)
(1) Actual range may vary depending on environment
