1. Modbus Link/Plus

2. Advantages Sutron's SDI/MODBUS Wireless Sensor Networks
Sites where wiring is not practical (across a river, on rotating spindle etc).
Avoids expensive wiring, conduits, installation and maintenance.
Makes system easily scalable (add more sensors)
Less susceptible to vandalism.
Highly reliable, scalable, secure, robust, cost effective
Multiple sensor types
Complex data processing/analysis available w/9210 Master

3. Key Technical Specifications
Operating Frequency: 2.4 Ghz
Network type: Ad-hoc homogenous mesh
Range: 1mile per hop
Latency: 1s per hop
Power Consumption: v (average)
Internal Battery: 19Ah Lithium D-cell
External Power: 8-16v dc
Operating Temp: -40C to +60C
Enclosure: NEMA rated (4.72”x 3.15” x 2.17”)
Protocol : Modbus RTU
Interfaces: RS-232, RS-485
Status indicators: 3 LED (red/green/orange)

4. Sensor Inputs 3 independently switched 12v supplies
Programmable warmup for each supply
24 bit ADC
Built in 2.5v precision reference
2 x Single ended analog inputs (0-5v)
3 x Differential Inputs
2 x SDI Sensors
1 x Frequency input
1 x Digital Input (Rain Gauge)

5. Compatible Equipment ModbusLink-M ModbusLink-S
9210 Data Logger via available RS232 or RS485 port
8310 Data Logger via available RS232 or RS485 port (version TBD)
PLC or PC with serial port
ModbusLink-S
Sutron Radar Level Sensor – RLR
Constant Flow Bubbler – ,
Stage Discharge Recorder (SDR) - SDR
Submersible Pressure Sensor INW- PT12
Any Modbus Sensor with RS232 or RS485, up to baud.

6. Installation Configurations
Simple Installation with 1 Master & 1 Slave

7. Sample Installation Configurations

8. Installation Configurations

9. ModbusLink – Network Features
All nodes are capable of routing messages while remaining in low power mode
Multiple ModbusLink networks can co-exist without interference.
Ad-Hoc mesh network (Automatic route formation)
Most efficient route to destination will be used
Routes periodically refreshed to improve reliability
Dynamic route tables, no RF/memory overhead for maintaining unnecessary routes.
Robust - New routes discovered if intermediate routes fail
Simple Network commands to maintain/query Network status(Network Scan, Blink Remote LEDs etc)
Simple command line interface to configure network / Modbus parameters

10. Network basics G 3 2 4 5 6
Logger

11. Network basics 3 types of Network Route messages Route Request (RREQ)
Route Response (RREP)
Route Error (RERR)

12. Network basics Example Gateway -> 6 G broadcast RREQ for addr 6
2,3,5 receive RREQ from G
2,3,5 update route table (2->G …)
2,3,5 rebroadcast RREQ
4 receives RREQ from 2 & 3
4 Discards 2nd RREQ as hop cnt not less
4 rebroadcasts RREQ G 3 2 4 5 6

13. Network basics 6 receives RREQ from 2 Forward Route complete (Unicast)
Update Table (6->2----->G)
RREP to 2 (dest G)
2 receives RREP, updates Table (2->6)
2 fwds RREP to G G 3 2 4 5 6
Logger

14. Network basics Route Formation Complete
Route Table (G) => 6,2,Sq#,HopCnt
Route Table(2) => 6,6,Sq#,HopCnt
=> G,G,Sq#, HpCnt
Route Table (6) => G,2,Sq#,HopCnt
Min RSSI threshold for reliability
Route’s refreshed every 48hrs
Message Delivery M 3 2 4 5 6

15. Competitive Analysis Compare Sutron with Banner Engineering
Specification
Sutron (ModusLink)
Banner
(Surecross DX80G9M2S-P /DX80N2X1S1S)
Power
450 (All nodes)
(Gateway)
240 (End Device)
Network Type
Self Healing ad-hoc mesh
Network Hardware
Homogenous ( all nodes identical)
2 types of devices
Gateway
Repeaters / End Devices
Routing
All nodes capable of Routing
Only repeaters can route messages
Range
1mile (per hop)
2 Miles (per hop)
Freq
2.4GHz
2.4Ghz
Network Configuration
Automatic configuration
Each Node/Repeater address set using rotary dial.
DIP switches to configure node as repeater or End-Device
Mounting
NEMA rated enclosure for external mounting
Secondary Enclosure needed
Protection
Gas tube protected RS-485 port
None

16. ModbusLinkPlus
3 independently programmable switched 12v power supplies for sensors.
2 X Single ended analog
2.5v reference voltage for bridge sensors
3 x Differential inputs
1 SDI-12 Sensor
2x Digital inputs (frequency, counter)

17. Ordering Part # Description
MBLINKPLUS-1 Wireless network node with I/O (transceiver with built-in SDI-12, Analog & Digital Inputs). No Enclosure
MBLINKPLUS-1E Wireless network node with I/O (transceiver with built-in SDI-12, Analog & Digital Inputs) With NEMA Enclosure & internal battery
External antenna Kit(3dBi antenna, 20’ low loss cable, mounting kit)

18. Future Support
Wireless Radar
Wireless Tipping bucket

19. St. Marys Dam, MD

20. System Configuration 1 x ModbusLink – Master Sutron 9210 Datalogger
8 x ModbusLink - Slaves
8 x INW Pressure sensors (Water Level + temperature)

21. Master Station
ModbusLink Master

22. Slave Station

23. Thank You