Home » Obvius R9120 (3/3T/5/5T) Modhopper Wireless Modbus Communications Device
Obvius R9120 (3/3T/5/5T) Modhopper Wireless Modbus Communications Device




The Obvius Modhopper a wireless Modbus/pulse transceiver which provides a self optimizing wireless interface between multiple Modbus devices and networks, perfect for:
Modhopper is the perfect solution for connecting new or existing Modbus and pulse devices (meters, sensors, etc.) without the need for costly wiring runs, core drilling or conduit. Simply connect the Modbus devices to the serial port on the Modhopper and the transceivers will automatically detect the optimum routing to insure reliable and timely data communications. Data from each Modhopper wireless transceiver is passed from one transceiver to another to reach its ultimate destination. This self-managed mesh network means that the system will function with high reliability where other wireless systems fail due to short- or long-term interference with radio signals.
Models:
R9120-3 ModHopper Wireless Modbus/Pulse Transceiver
R9120-5 ModHopper Wireless Modbus/Pulse Transceiver
- Submetering commercial and industrial facilities,
- Adding Modbus devices to any network without the need for costly communications wiring.
- Connect up to 128 RS 485 Modbus devices to any Modbus network
- Use “Plug and play” connectivity for supported devices to the Obvius AcquiSuite data acquisition server
- Unique “mesh” technology means optimized routing of communications with NO PC OR SOFTWARE CONFIGURATION!
- Accepts standard pulse inputs or Modbus RS485
Modhopper is the perfect solution for connecting new or existing Modbus and pulse devices (meters, sensors, etc.) without the need for costly wiring runs, core drilling or conduit. Simply connect the Modbus devices to the serial port on the Modhopper and the transceivers will automatically detect the optimum routing to insure reliable and timely data communications. Data from each Modhopper wireless transceiver is passed from one transceiver to another to reach its ultimate destination. This self-managed mesh network means that the system will function with high reliability where other wireless systems fail due to short- or long-term interference with radio signals.
Models:
R9120-3 ModHopper Wireless Modbus/Pulse Transceiver
- Output power 100 mW
- Max range 1500 ft. per hop
R9120-5 ModHopper Wireless Modbus/Pulse Transceiver
- Output power 100 mW
- Max range 3000 ft. per hop
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Full Review
- Modhopper is a breakthrough mesh technology design that makes wireless connectivity simple and cost effective:
- Connect up to 128 RS 485 Modbus devices to any Modbus network
- Use “Plug and play” connectivity for supported devices to the Obvius AcquiSuite data acquisition server
- Unique “mesh” technology means optimized routing of communications with NO PC OR SOFTWARE CONFIGURATION!
- Accepts standard pulse inputs or Modbus RS485
Internal View

| Specifications | |
| Processor | 600MHz ARM7 embedded CPU |
| LEDs | 3 x RF, 2 x RS485, 2 x Pulse, Alive, Alarm |
| Power | |
| North America | 110-120VAC, 60Hz, primary |
| CE/Europe | 100-240VAC, 50-60Hz, primary (interchangeable plug adapters optional) |
| Power Supply | 9VDC, 200mA, class 2 wall brick transformer included (not included with -T models) |
| Communication | |
| Protocols | Modbus RTU, 2-wire |
| Addressing | Modbus address may be set from 1 to 247 via dipswitch |
| Baud Rate | 960/19200 baud, N, 8, 1 |
| RF | Frequency hopping, spread spectrum (FHSS), ISM band (see table) |
| Inputs | |
| I/O | 2x Pulse, dry contact, standard or KYZ, closure threshold 100Ω to 2.5Ω user selectable |
| Pulse Rate | User selectable to 10Hz, 50Hz, 100Hz, 250Hz
|
| Storage | Pulse counts stored in non-volatile memory |
| Modbus | Modbus RTU, 2-wire, hard-wire connect up to 32 devices (expandable) |
| Range | |
| R9120-3 | 900MHz, 100mW, 1500ft (450m) indoor, 7 miles (11km) line of sight (LOS) |
| Physical | |
| Weight | 1.25lbs (0.67kg) |
| Size | 6.5" x 4.5" x 2" (260mm x 64mm x 25mm) |
| Environment | |
| North America | -30 to 70C, 0-90% RH, non-condensing (-T version only, R9120-3T) |
| North America | 0 to 50C, 0-90% RH, non-condensing |
| CE/Europe | 5 to 40C, 0-90% RH, non-condensing |
| Altitude | 2000M max |
| Pollution | Degree 2 |
| Codes and Standards | |
| FCC ID | OUR-9XTREAM |
| IC (Industry Canada) | 4214A-9XTREAM; FCC CFR 47 Part 15, Class A |
| Encryption | *Only available on R9120-5 models |
| Additional Notes | |
| NEMA enclosures available upon request | |
| For use with any Modbus RTU device/server. Manufactured in the USA | |
| 2-year Limited Warranty | |
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