Catalog 77-1016

Visit our website at www.bsbsmartdisk.com for the most complete, up-to-date information.

SmartDiskTM System comprisedof DTM powered

Burst Alert® Sensor, transmitting to DMM unit.U.S. patent 6,124,806 and other international patents pending.

BS&B PRESSURE SAFETYMANAGEMENT, L.L.C.

Safety Management TechnologySafety Management Technology

SmartDiskTM

Wireless Sensor & Monitor SystemSmartDisk

TM

Wireless Sensor & Monitor System

IntroductionThe SmartDisk™ Wireless Sensor & Monitoring System bringsintelligent, reliable and cost effective communications technology topressure relief devices without the traditional expense of wiringbetween the pressure event sensor and the monitor.

Operating PrincipleAn ultra high frequency radio transmitter is fitted to a pressureevent sensor. When an overpressure, flow or other pressure eventoccurs, the sensor changes state typically from “closed circuit” to

SmartDisk brings wireless communications to Pressure Relief Devices.

Pressure Event SensorsAny simple “change of state” sensor can be integrated into theSmartDisk Wireless Sensor & Monitor System, including:Burst Alert® SensorsDeveloped initially for use with rupture disk devices, the BurstAlert® Sensor (BAS) is a perforated polymer membrane supportinga Tantalum conductor wire (Tantalum is chosen for its wide rangeof corrosion resistance). The Tantalum wire is designed to break bya pressure event to produce an "open circuit" condition. BAS sen-sors are available for applications ranging from a few inches ofwater column (a few millibar) to several thousand psi (hundreds ofBar), and are detailed in catalog # 77-1010.The BAS technology may be applied to the outlet side of manypressure relief devices to detect their function. For example; rup-ture disk devices, pressure relief valves, safety valves, and tank vents.Installation is directly between the outlet flange of the pressurerelief device and the mating companion flange. (Sanitary/asepticpiping compatible BAS technology is also available.) Leak Detector Alert SensorsThe Leak Detector Alert Sensor (LDAS) uses the same “brokenwire” concept as the BAS but with an integral pressure seal to allowdetection of leakage through a rupture disk, pressure relief valve,safety valve, tank vent, or other pressure relieving device.Proximity SwitchesBy detecting movement, a proximity switch can be used to sense thefunction of a pressure relief device. This might be the lifting of apressure relief valve, the rotation of a butterfly relief valve or theopening of an explosion vent panel. (Type MBS sensors are detailedin catalog #77-1009B; this is a magnetically activated proximityswitch).Pressure SwitchesA pressure switch can be used to denote a single pressure event.That event may indicate the function of a pressure relief device, orit may be a pressure value that requires a response. The "tell tale"function required by the ASME Boiler & Pressure Vessel Codewhen a rupture disk device and a pressure relief valve are used incombination is frequently satisfied by a pressure switch.

Latched/Unlatched Pressure Event Sensor MonitoringDepending upon the requirements of the application, theSmartDisk System can be set to “latch” when the first sensor“change of state” is monitored, or to remain “unlatched” such thatevery “change of state” is reported.

SmartDiskTM

Safety Management TechnologySmartDiskTM

Safety Management Technology

TM

SmartDiskSafety Management Technology

PatentedSmartDiskTM components are compatible with BS&BSmartSystemTM, the wireless platform of choice.

“open circuit” and the transmitter broadcasts the event. A receivingstation is configured to recognize this transmission. The receivingstation identifies a unique signal from the transmitter and issues animmediate alert identifying the pressure relief device and the pres-sure event. Annunciation of the event can be through a monitorintegral to the receiving station, relay outputs in the receiving sta-tion, or existing user control systems.

The SmartDisk System cost effectively provides pressure safetyalerts for up to 32 devices per receiving station module.

Data Transmission Module (DTM)The SmartDisk DTM is designed to transmit a pressure eventalert (sensor change of state) wirelessly. The DTM uses UltraHigh Frequency radio communication (RF) that does notrequire licensing*. The DTM is connected to the pressureevent sensor & immediately commences transmission when asensor "change of state" occurs. The DTM broadcasts the"change of state" of the sensor & its unique identity numberfor monitoring by a SmartDisk receiver module (DRM orDMM).

The RF components of theDTM are a sealed

unit with a smallbattery packattached to the

front containinga replaceable long

life Lithium cell.The DTM battery

pack powers boththe pressure event sen-

sor and the transmitter.(External powering of

the DTM will automatically disconnect the integral battery.)The small mass, compact design, and integral battery power

of the DTM allows for easy installation. The DTM isdesigned for installation close to a pressure event sensor,however, the cable connection between them can be up to 20feet (6.1 meters) long.

Designed for use in intrinsically safe areas, the DTM is cer-tified for use on Class 1, Division 2, Group B,C, and D zones.* According to the part 15 FCC standard in the USA; check withBS&B for other territories.

DTM module

The RF signal from DTM units is picked up at aSmartDisk receiver. There are two receiver models:1). DRM 2). DMM …which use the same communications technology.They are the hubs of the SmartDisk System (pictured).The DRM is programmed by temporary attachment toan external PC using standard hyper terminal software.The DMM provides the option of local programmingwith an integral keypad and local alarm/status annuncia-tion with a two-line scrolling LCD display and adjacentLED’s. Both the DRM and DMM connect to external systems usingRS232/485 ports and communicate through Modbus protocol toprovide externalS m a r t D i s kSystem statusand alarm infor-mation.

A DRM orDMM is locatedin RF proximityto the DTMtransmitters thatare to report tothat receiver. TheSmartDisk DRM/DMM can beprogrammed by the user to regis-ter the unique identity numbers of

SmartDiskTM Calibration PackageIn order to select the best RF location for each SmartDisk Systemcomponent, the calibration package is used to scope a new instal-lation or to add DTM modules to an existing system. The calibra-tion package copies the SmartSystem RF characteristics and pro-vides the user with a readout of field RFconditions. Since local RF condi-tions can vary over shortdistances, the use ofthe SmartDisk calibra-tion package willensure the best inte-gration of this wirelessequipment into a facility.The calibration package iseasy to use and operates byactivating a CalibrationTransmission Module (CTM) through connec-tion of a CTA plug (pictured right) to simulatecontinuous DTM data transmission. A receiv-er is configured by combining a CalibrationReceiver Module (CRM) and a PDA loadedwith SmartDisk System calibration software

SmartDisk Module IndexDTM – Data Transmission ModuleDMM – Data Monitoring ModuleDRM – Data Receiving ModuleRTM – Receiver Transceiver ModuleRTM-CC – RTM Cable ConnectorCTM – Calibration Transmitter ModuleCTA – Calibration Transmitter AdapterCRM – Calibration Receiver ModuleCRA – Calibration Receiver AdapterPDA – Personal Digital Assistant

these DTM units together with helpful user location infor-mation. The capacity of each DRM or DMM is 32DTM units.

The DRM and DMM each comprise two separateenclosures. The first contains the SmartDisk infor-mation processing equipment and this is labeledDRM or DMM. The second contains the RF com-

ponents and is labelled “RTM”.Each DRM or DMM is pro-vided with an RTM and 10foot long connecting cable(RTM-CC). Separating theRF component allows forinstallation of the DRM or

DMM monitor box indoors,inside an additional userenclosure, or simply in a con-

venient outdoor location whilethe RTM can be installed externally and in

the orientation that provides the best RF com-munication.

The DRM and DMM require DC power (8~32V DC) whichin turn powers the RTM.

using a CRA cable (pictured left). Communication betweenthe CTM and the CRM is two-way allowing the RF signal

strength to be measured in both directions and displayed onthe PDA screen.

By following the SmartDisk Calibration Manual, the best loca-tion for both DTM and DRM/DMM modules is quickly andconveniently established.

The CTM and CRM are designed to respond only to eachother to avoid the detection of DTM units in an exist-ing SmartDisk System.

Pictured above, clockwise: CRM, PDA and CTM. The CTM, activat-ed by the CTA plug, transmits to the CRM which acknowledges backto the CTM. This two-way communication enables the SmartDisk soft-ware in the PDA, connected to the CRM by the CRA cable, to indicateRF signal strength in both directions.

Data Receiving Module (DRM)/Data Monitoring Module (DMM)

The DRM and DMM comprise two enclosures. The upper enclosure houses the RF components,the lower on the DRM houses the SmartSystem processor, while the lower on the DMM housesthe SmartSystem processor, keypad, LCD screen and LEDs.

BS&B Pressure Safety Management, L.L.C.7455 East 46th Street

Tulsa, OK 74145, USATel: 1-918-622-5950Fax: 1-918-665-3904

Toll Free: 1-866-DSK-SMRTmktg@tul.bsbsystems.com

www.bsbsmartdisk.com

Products, specifications and all data in this literature are subject to change without notice.Questions regarding product selection and specifications for specific applications should bedirected to BS&B Pressure Safety Management, L.L.C. BS&B® and Burst Alert® areregistered trademarks of BS&B Safety Systems Ltd. SmartDiskTM is a trademark ofBS&B Safety Systems, Ltd.All sales are subject to BS&B Pressure Safety Management, L.L.C. standard termsand conditions of sale. Nothing herein should be construed as a warranty of mer-chantability or fitness for a particular purpose. BS&B is a registered trademark of BS&B Safety Systems, Ltd.Printed in the USA, January, 2003.

SmartDisk System Technical InformationThe SmartDisk System is designed for high integrity operation with the fol-lowing standard features:

“Heartbeat” signal between DTM and DRM/DMM - To ensure that a DTMremains “visible” to the DRM or DMM module to which it has been pro-grammed, every two minutes a “heartbeat” signal is sent from the DTM.The DRM/DMM is anticipating this periodic signal and will raise a “loss ofcommunication” alarm if contact is not established.Two-way RF communication between DTM and DRM/DMM - This allowsfor a handshake between DTM and DRM/DMM modules. In the case ofa missed DTM “heartbeat,” the errant DTM has no acknowledgementfrom the DRM/DMM and “retries,” to avoid generation of a nuisancealarm.DTM “Low Battery” warning - Along with each DTM “heartbeat,” comesbattery life information. This is used to generate a low power warning sev-eral months before battery depletion under normal “heartbeat” conditions.(This feature is not active when a DTM is externally powered).Dedicated RF signal packet - The SmartDisk system communicates withdigital data packets that include a unique preamble. If this preamble is notpresent on incoming communication, the system components do not losetime listening to the rest of the inbound message. This maximizesSmartDisk System sensitivity and responsiveness.DTM Registration - When the SmartDisk System is used as recommendedwith DTM units registered to their respective DRM/DMM modules, mul-tiple independent SmartDisk Systems can be operated in close proximitywithout interference.DTM “Retry” Messaging - When a “change of state” is registered at a DTM,it will repetitively transmit until acknowledged by its DRM/DMM module.A well calibrated installation will typically report the change of state fromthe first DTM transmission.Radio Communications - SmartDisk technology uses ultra high frequencyradio communication in the 902~928 MHz band that does not require user

Building a Wireless Sensor SystemThe freedom of wireless technology gives SmartDisk the flexibility toadapt to local installation conditions. Up to 32 DTM transmitter mod-ules can be programmed to a single DRM or DMM receiver. UsingRS232/485 cable, up to 32 DRM or DMM units can be connectedtogether.The modular construction of the SmartDisk system makes applicationof the technology to both new and existing pressure relief devices orsystems simple and cost effective. Basic guidelines to be followed are:� All applications need one DTM per pressure event sensor (BAS, pres-sure switch, etc.) unless wired in series.� All applications require either a DRM or a DMM. If integral annun-ciation of alarm conditions and/or programming without the need forexternal PC equipment is required, use the DMM.�When central monitoring of pressure relief devices is desired, connectthe DRM and DMM to existing safety management systems usingRS232/485.

licensing by the FCC for use in the United States. Frequency hopping,spread spectrum technology is employed.Electrical Power Supply - The DTM requires no external power. The DRMand DMM require 8~32V DC power.Outdoor Use - The DTM, DRM, DMM, ITM, CRM, CTM, CRA and CTAare all suitable for outdoor use. The DTM is supplied as a sealed unit forconnection to a pressure event sensor using weatherproof type SDCSmartDisk connectors.The DRM is supplied in NEMA 4X enclosures.The DRM and DMM must be installed within RF range of the DTM unitsthat are a part of their SmartDisk system.Reliability - Each DTM completes a “handshake” every two minutes withits DRM/DMM unit(s). Use the SmartDisk System calibration package toestablish the best possible RF connection for each application location.Battery Life - The shelf life of the DTM is over three years. Service life istypically one to two years of normal use. The DTM battery is replacedwhen its “low battery alarm” is given typically many months before the bat-tery is depleted.

SmartDisk External Communication OptionsRS232/485-Both the DRM and the DMM connect to external user systemsvia RS232 or RS485. Communication is achieved using the Modbus proto-col. All DRM and DMM units are identified as “slave unit” and their iden-tity can be assigned as part of their programming.Relay Output - The DRM and DMM have two external relays that can beused to generate additional alarms. The activation of these relays is option-al and determined during the programming of the DRM or DMM by theuser.Text Display & LED’s - The DMM has a two-line text display that will auto-matically indicate the details of the last device that is at alarm status. LEDscan be programmed to give an additional visual indication of warnings andalarms. The DMM screen can be scrolled to access the status of each DTMmodule at any time.

� To add a sensor to a SmartDisk System, install a new DTM to the sen-sor and add its unique identity number to the DRM or DMM.� To gain the best RF communication, plan a SmartDisk System usingthe calibration package.Typical functions of the SmartDisk System are to alarm the operationor leakage of:

Rupture Disk Device

Explosion Vent

Pressure Relief/Safety Relief Valve

TankVent

Buckling Pin Device

BS&B PRESSURE SAFETYMANAGEMENT, L.L.C.