Modbus Link/Plus

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

Key Technical Specifications Operating Frequency: 2.4 Ghz Network type: Ad-hoc homogenous mesh Range: 1mile per hop Latency: 1s per hop Power Consumption: 450 µA @ 3.6v (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)

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)

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- 0003-1 Constant Flow Bubbler – 56-0133-25, 56-0134 Stage Discharge Recorder (SDR) - SDR-0001-1 Submersible Pressure Sensor INW- PT12 Any Modbus Sensor with RS232 or RS485, up to 57600 baud.

Installation Configurations Simple Installation with 1 Master & 1 Slave

Sample Installation Configurations

Installation Configurations

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

Network basics G 3 2 4 5 6 Logger

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

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

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

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

Competitive Analysis Compare Sutron with Banner Engineering Specification Sutron (ModusLink) Banner (Surecross DX80G9M2S-P /DX80N2X1S1S) Power 450 µA @3.6v (All nodes) 50mA @24v (Gateway) 240 µA @3.6v (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

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)

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 6661-1325-1 External antenna Kit(3dBi antenna, 20’ low loss cable, mounting kit)

Future Support Wireless Radar Wireless Tipping bucket

St. Marys Dam, MD

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

Master Station ModbusLink Master

Slave Station

Thank You