Obvius R9120 Rev C - Manual (Page 4)

Overview
The ModHopper™ wireless Modbus/pulse transceiver is designed to allow systems integrators the ability to communicate
with remote locations while avoiding the costs associated with running low voltage wiring to multiple locations in a single or
between multiple buildings. To meet these requirements, the ModHopper™ provides the installer with all the tools
necessary to install and configure the hardware and software with a minimum of time and investment.
Applications
The R9120 wireless Modbus/pulse transceiver has several applications. These include:
● Energy Monitoring.
● Solar PV Power Generation monitoring
● Malls, office buildings, and other tenant energy monitoring applications.
Installation Checklist
A ModHopper™ system installation has the following components:
Required hardware
● Two or more ModHopper R9120 transceivers.
Note: the R1920 transceivers must be the same radio type. e.g. R9120-3 must be used with another R9120-3;
R9120-5 must be used with another R9120-5.
External hardware
● RS485 Modbus master system such as an A8812 AcquiSuite™ or a Modbus compatible PLC.
● Optional: RS485/Modbus slave devices such as power meters or IO modules.
● Optional: Pulse output transducers for measuring gas, electricity, water, etc. from existing meters and sensors.
Make sure to obtain the pulse output scale, or multiplier for each device you will be using.
● Low voltage wire for attaching pulse or Modbus devices to the R9120, typically 18-24gauge
Page 4 ModHopper R9120 rev C – Wireless Modbus/pulse transceiver