SiloPatrol - Model SMU -Smart Level Sensor Inventory Management System

• Weight and Cable-Based “Smart” Level Sensor Is Unaffected By Material Composition
• Level Sensor Uses Innovative Hall Effect Technology To Maximize Application Reliability By Effectively Regulating Power To Motor Under Varying Load Conditions
• Wireless Bluetooth® set-up allows operator to utilize a free configuration app on an Android(TM)-based device with Bluetooth capability to easily configure the SMU set-up.
• Widened array of programmable features including cable cycle limit and relay output for high or low distance threshold setting, error indication or cycle operate
• Modbus(TM) connectivity lets RS-485 version of the SMU communicate with existing control systems
• Measuring Range Up To 150 feet (46m) For Powder Bulk Solids Material Levels In Bins And Silos. (Works For Some Liquid & Slurry Applications With Optional Ball Float Plumb Bob)
• Industry–Best Measurement Resolution Of 1/100’ (0.12”; 3mm)
• Virtually Maintenance-Free
• Split-Compartment Enclosure Isolates Electronics And Measurement Optics From Process Material
• Uniquely Designed Wiper Seal Compartment For Fast, Easy Servicing or Replacement If Necessary
• RS-485 And Analog Sensor Outputs Available
• Hazardous Location Sensor Version
• SiloTrack(TM) CLOUD Remote Inventory Management Solution (Click Here)
• SiloTrack(TM) PC-Based Inventory Management Solution (Click Here)
• HMI2 Local Operator Interface Option (Click Here)
• Wireless Sensor Interface Solutions (Click Here)
• Auxiliary System Outputs Available (Click Here)

The Silo Patrol SE level sensor technology is suitable for use with a multiplicity of powders, granules, slurries and liquids, even in the most harsh and dynamic conditions. The heart of the Silo Patrol SE level measurement system is the sensor itself. The Model SMU (Silo Monitoring Unit), incorporates technological advancements, requires no field adjustments and its robust design provides virtually maintenance-free operation. The SMU is suited for most any application and can be equipped with a variety of mounting flanges and plumb bobs. The Silo Patrol SE system also offers sensor interface choices:

• RS-485 “smart” communications output with wireless Bluetooth® set-up and Modbus connectivity
• 4-20mA analog output with wireless Bluetooth® set-up

The “smart” RS-485 output version SMU can be connected with either the multi-functional HMI2 Operator Interface Control Console or with SiloTrack™ PC-based Inventory Management Software that provides a flexible graphical interface for up to 128 sensors. Also includes Modbus connectivity to communicate with other operator interfaces or control systems being used at facilities that utilize Modbus.

If a stand alone level detection sensor with analog output and no operator interface display is what you are looking for, the SMU is available in this type of configuration at an affordable purchase price. The SMU is available as a truly stand alone analog output transmitter, including automatic measurement initiation and a relay output.

Once a measurement cycle is initiated, the SiloPatrol® SE sensor (SMU) “smart” motor system controls the descent of a plumb bob, attached to a heavy-duty stainless steel cable, into the vessel. The SMU measures the amount of cable dispensed via its unique optical sensing system. The SMU’s optic system is completely sealed from the internal environment of the electronics compartment, which is isolated and sealed from material ingress in the mechanical compartment, to ensure long-term reliable operation. The descent of the bob is maintained at an optimal speed by the “smart” motor control system, contributing to the elimination of cable slack and maximizing the motor life. In conjunction with the unique dual optical sensing system, the “smart” motor control system guarantees that the bob will stop when it contacts the material surface and eliminates the need for a mechanical brake. When the bob reaches the material surface, the SMU reverses the direction of the motor and transmits the distance value. During the ascent of the bob, the SMU measures the amount of cable gathered and controls the speed of ascent. This ensures proper cable wrapping in the patented storage reel and tangle-free operation. In addition, the motor control system has a “Descend-Assist” feature that can be used to prevent the plumb bob from “clinging” to the socket that might occur in extreme applications.

The SMU also includes an innovative Hall-effect sensor array that monitors the movement and position of the swing-arm that controls the absorption of slack in the cable system during descent and ascent. The SMU is smarter than ever and uses this technology to control the cable and plumb bob travel to ensure reliability of the measurement cycle, even with harsh changing conditions in the most severe applications. The standalone versions of the SMU generate a 4-20mA output in response to a measurement query, or automatically with the analog output version. The standard “smart” RS-485 SMU communicates with the operator interface chosen for the system (HMI2 or SiloTrack™ PC software). These operator interfaces can perform calculations and conversions to display the data in the format desired. The RS-485 version of the SMU has Modbus (RTU or Ascii) connectivity to communicate with other operator interfaces or control systems being used at facilities that utilize Modbus. The SiloPatrol SE system, if so equipped, will also generate auxiliary analog and/or relay outputs. RS-485 communications can be accomplished via hardwiring or with wireless transceivers.

The SiloPatrol® SE Inventory Management System can be used in a wide variety of applications. These include, but are not limited to, simple inventory monitoring with a standalone HMI2 display to Remote and Vendor managed inventory solutions using SiloTrack™ server and client software to manage inventories at multiple facilities while providing access to a virtually unlimited number of users. Materials being monitored include a broad list of powders and bulk solids, as well as, a wide range of liquids and slurries. These include coarse/fine granular solids, powders, liquids, foodstuffs and many other substances.

Typical Applications include, but are not limited to:

• Feeds
• Cement
• Bulk Chemicals
• Grains
• Rocks / Aggregates
• Oils
• Plastic Pellets
• Coal
• Some Liquids
• Plastic Regrind
• Sand
• Water / Solid Interface
• Powders
• Limestone
• Coffee

The SiloPatrol® SE Model SMU sensor is available certified for either Ordinary or Hazardous locations. The SMU also carries the CE Mark. Consult the Specifications section for further information.

FREEZE-RESISTANT MOUNTING FLANGES SMU sensors can be provided with either the standard flat mounting flange or one of the angled flanges (5° and 10° available) for adapting to sloped roofs. Each of these standard flanges has a unique design that resists freezing of the plumb bob to the underside of the flange. This is especially important in very cold climate conditions where moisture from condensation within the silo can form and create ice on the underside of the silo roof, usually due to cycling above and below freezing temperature in an outdoor installation. In these applications the freeze-resistant flange may eliminate the need for standpipe or flange heating. Contact the factory for modified ANSI/DIN flanges (not “freeze resistant”).

The SiloPatrol® SE Model SMU sensor makes a direct measurement of the distance between the sensor and the material surface. This equipment does not measure the volume or weight of the material within the vessel. The HMI2 and SiloTrack™ PC-based software, when used with a SiloPatrol SE “smart” output sensor, may be able to perform calculations to display the volume and weight of the material. These calculations are based upon the distance measurement and the vessel dimensions and material bulk density entered by the user during setup. Note: The calculated volume and weight values should be considered "estimates". Monitor Technologies LLC accepts no responsibility for the accuracy of the calculated and displayed volume and weight values. The accuracy (not stated or warranted) of the volume/weight calculations are effected by the fluctuation and accuracy of various factors. These factors include, but may not be limited to, actual vessel dimensions, sensor mounting location, angle of repose (negative and positive), material bulk density, material flow properties (ratholes, bridging, etc.), material inlet/discharge locations and material packing. Please consult the factory to discuss applications where volume/weight is of critical importance.

Silo Monitoring Unit (SMU)

• Power Requirements: 115 VAC or 230 VAC(+15%), 50/60 Hz
• Power Consumption: 6 VA continuous, 50 VA intermittent
• Altitude: 6562ft (2000m) maximum
• Installation Category: II
• Pollution Degree: 4, Suitable for indoor/outdoor use
• Process Temperature: -40° F to 300° F (-40° C to 149° C)
• Ambient Operating Temperature: -40° to +150°F (-40° to 65°C)
• Maximum Internal Bin Temperature:
• Up to 300°F (149°C) with use of bare stainless steel cable
• Up to 200°F (93°C) with use of stainless steel jacketed cables
• Maximum Vessel Pressure: 15 PSI
• Measurement Range: 150 feet maximum (45.7 m)
• Measurement Rate: 1.0 ft./sec. (typical) (0.3 m/s)
• Accuracy: +/- 0.25% of distance reading
• Repeatability: 0.1 ft. (30 mm)
• Resolution: 1/100 ft. (0.12 inch; 3mm)
• Mounting: Freeze-Resistant "K" flange, 8" dia. with 7" bolt circle
• Conduit Entry: Two 3/4" NPT
• Cable:
• 1/16" nylon-jacketed (270lb/123kg tensile strength)
• 3/64" SS unjacketed (270lb/123kg tensile strength)
• 1/16" polyethylene-jacketed (270lb/123kg tensile strength)

Output Signal:

• Standard "Smart":
• RS-485 half-duplex, isolated, proprietary protocol
• Address Selection: 1-16 (SiloPatrol); 1-247 (Modbus)
• Relay Output - 5A @ 250VAC max, isolated, dry contact
• Pulse: Discontinued
• Analog:
• 4-20 mA, reversible to 20- 4mA, isolated;
• 500Ohms maximum loop resistance
• Relay Output-5A @ 250VAC max, isolated, dry contact
• Input Signal:
• Sound (Pulse, Analog)
• Vhi - 98-265VAC/VDC, 9.5K ohm input, isolated
• Vlo -20-55VAC/VDC, 2.0K ohm input, isolated
• Lockout (All)
• Vhi - 98-265VAC/VDC, 9.5K ohm input, isolated
• Vlo - 20-55VAC/VDC, 2.0K ohm input, isolated
• Wiring Distance("smart"):
• 3,280 ft (1,000 m) max. @ 9600 baud, 26 AWG
• Address Determination ("smart"): 1-16 (switch selectable)
• Internal Display (Analog): 2 lines, 8 characters per line, LCD
• Enclosure: Cast aluminum with powder coat finish
• SMU Weight (Approx.): 42 lbs. (19.1 kg)
• Plumb Bob Weight (Approx.): 2 lbs. (0.9 kg)
• Ship Weight (Approx.): 45 lbs. (20.4 kg) - Includes SMU, plumb bob, cable & carton
• Ship Carton Dimensions (H x W x L): 16 x 15 x 34 inches (406 X 381 X 864 mm) - Includes SMU, plumb bob & cable
• Air Purge Connection: 1/4" NPT
• Enclosure Rating: NEMA 4X / Enclosure Type 4X; IP66
• Listings / Approvals:
• CSA(US/C): Ordinary Locations;
• Class II, Group E,F,G; Class III
• ATEX: (Ex) II 1/2 D c
• Ex tb lllC T75°C Db IP66
• (Ta -40°C TO +65°C)
• IECEx: Ex tb lllC T75°C Db IP66
• (Ta -40°C TO +65°C)
• CE Mark

HMI2 Operator Interface Control Console

• Power Requirements: 100 - 240VAC, 50/60 Hz
• Power Consumption: 6 VA max
• Operating Temperature: -4° to +131°F (-20° to +55°C)
• Sensor Communication: RS-485 half-duplex, non-isolated, proprietary protocol
• Channels: Two 16-channel networks (32 channels total)
• Display:
• 2-lines by 20-characters per line
• .22" x .12" characters, LCD backlight
• Keypad: 20 keys
• Indicators: 8 LEDs (function, relay, error status)
• Enclosure: Overall Dim. (HxWxD):
• Painted Aluminum
• 6.29 x 10.23 x 3.54 in
• (160 X 260 X 90 mm)
• Approvals: CE Mark

AUXILIARY OUTPUT ENCLOSURE (AOE)

• Power Requirements: 115 VAC or 230 VAC, 50/60 Hz
• Power Consumption: 25 VA max
• Operating Temperature: -4° to +131°F (-20° to +55°C)
• Communication: RS-485 half-duplex, isolated, proprietary protocol
• Analog Outputs: 4-20mA, 16 max, 4 per card, non-isolated, 500 ohm max loop resistance, 10 bit resolution, zero/span set via HMI/SiloTrack™
• Relay Outputs: SPST, 5A @ 250 VAC, 32 max, 8 per card, visual LED per relay, assignment and action set via HMI/SiloTrack™
• Enclosure: Painted aluminum
• Overall Dimensions (HxWxD):
• 2-Card: 11.02 x 9.05 x 4.33 in
• (280 X 230 X 110 mm)
• 4-Card: 15.74 x 9.05 x 4.33 in
• (400 X 230 X 110 mm)
• Enclosure Rating: NEMA 4; IP66
• Approvals: CE Mark