LN1000 Intrinsically Safe Annunciator

Transcription

1 LN1000 Intrinsically afe nnunciar Modular larm ystem for all Hazardous reas EX Certified Ex II 1G, EEx ia IIC 4 Ideal for installation in any Zone Up 32 channels can be powered through one I interface Field-mounting product: flameproof or purged cabinets not required User-programmable alarm sequences I Compatible with a range of intrinsically safe audible and visual alarms larm indication by combined bright LEDs and LCDs he LN1000 Intrinsically afe nnunciar provides a unique solution for problems with hazardous area alarm indication. he nnunciar provides a visual display of the alarm status including first-up information and can be mounted in the hazardous area for the benefit of operars working in any Zone. he lightweight stainless steel construction gives a compact and simple install modular unit which can easily be expanded by the addition of extra larm Cards. Maintenance can be carried out live without the necessity of gas checks or prior shutdown. Unlike explosionproof, purged and type n systems, installation is simple and relatively low cost. With the addition of a number of ancillary devices a complete intrinsically safe alarm and control package can be provided.

2 Features & Benefits Lightweight he LN1000 being constructed from stainless steel and polyurethane mouldings is extremely lightweight in comparison conventional explosionproof and purged systems, this gives great benefits where space and payload are critical facrs, especially offshore. Fully Field Programmable Each two way alarm card is programmable for different alarm sequences and different functionality. ime Delays Each alarm input has a DIL switch selectable adjustable time delay of between 3 and 30 seconds eliminate false alarms caused, for example, by surging liquids. ystem ize wo chassis sizes are available 12way and 32way with the number of wo Channel larm Cards added suit the application. Further larm Cards can be slotted in at a later date if necessary. Larger systems can be created by linking chassis gether. Extremely Lower Power Even the 32 channel nnunciar complete with repeat relays on all channels can be powered from a single isolating interface. he ML5021 is recommended. First-Up In alarm annunciation applications it is often essential know which alarm occurred first in a particular group. o this end, three different first-up sequences and seven different first-up groups are available, all programmable by DIL switches. ervicing Because the unit is intrinsically safe, live inspection and maintenance procedures can be carried out at any time. ll configuration and maintenance is carried out from the front by simply removing the front facia and withdrawing the cards. Installation Installation is relatively simple using intrinsically safe equipment, there is no complicated purged panels control and no need for explosionproof conduit etc. he front of the unit is sealed IP65 so is suitable for mounting out in the field in harsh environments. Mounting he standard certified product is ly supplied for panel mounting in the cusmers control system. s an extra service K can supply the nnunciar pre-mounted in a IP65 stainless steel wall mounting cabinet. For ease of site wiring the LN1000 is then supplied pre-wired a row of terminals ready for external connection via the botm gland plate. wo types of wall mounting wiring are available, one with all connections taken terminals and a lower cost version which just has the basic alarm contact and common outputs wired terminals. Group Outputs he equence Card has outputs drive external sounders and also two group outputs which are DIL switch selectable follow the alarm logic or the alarm contacts. In conjunction with these group outputs each alarm channel also has two outputs configurable follow the alarm contact, the audible or the alarm logic. hese outputs can be linked provide group relay outputs for different alarm priorities and give a control output third party equipment in the safe or hazardous area. Complete larm Package s specialists in the supply of all types of alarm products K can provide all the components necessary produce a complete alarm package or can even provide the whole package fully wired and ready install.

3 ypical pplications Hazardous rea Inhibit switches emote control pushbutns DE ML5021 larm Inputs D-161 Battery Backup afe rea 24VDC VC supply larm contacts (32 max) eries PU D o safe area equipment o other I equipment D dB ounder DD ML5021 D D135 LED Beacon ML5021 D Hazardous rea D dB ounder D135 LED Beacon larm contacts (32 max) he LN1000 intrinsically safe alarm annunciar functions in the same manner and with the same operational logic as conventional flashing-light alarm panels. he system is extremely flexible. In its simplest form it consists of a 24VDC power supply, an isolating interface, and a 12 or 32 channel annunciar shown in the diagram above. For both large and small systems, the D- Intrinsically afe elays are ideal for transferring signals from safe hazardous areas or in the opposite direction or even within a hazardous area. DD DD ML5021 ML5021 afe rea 24VDC dditional audible and visual warning devices can be connected provide the clearest possible method of attracting the operar s attention. Optional I Warning Devices For large and small systems, the 100dB DB-5 ounder and/or a D135 LED Beacon can be added attract the operar s attention in noisy environments. Each can be driven in either of two ways: By controlling the 24VDC supply with a D I elay in the safe area (p). By controlling the supply from an ML5021 with a DD I elay in the hazardous area (left). his alternative arrangement can provide considerable savings in cable costs in some applications. I Interface he nnunciar and the optional warning devices each operate from any suitable 24VDC supply through an I isolating interface unit. he recommended interfaces are the ML5000 eries which, owing their input/output isolation, do not need a high integrity earth and are therefore easy install. I elays he D- eries of I elays are used for transferring status signals and from hazardous and safe areas. hese unique solid state devices act like the coil and contacts of an electromechanical relay. Power upply Units he eries Power upplies will conveniently provide a 24VDC supply from the C mains power circuits protected by the ML5000 eries units. separate battery backup unit, the D- 161, is available for use with the PU.

4 ystem Operation Displays he nnunciar functions in a similar manner a conventional, safe area annunciar, but because of the limited power available the standard backlit display window is changed a combined high brightness LED and an LCD. When an alarm occurs a sounder and/or a beacon will be activated attract the operar s attention. high brightness LED on the LN1000 facia will pinpoint the affected channel(s). cusmised legend gives details of the plant parameter that needs attention. he LCD display gives further details of the alarm situation such as which alarm occurred first and whether the alarm condition has returned. he LED will always follow the I alarm sequence selected. he LCD display can take any of the seven forms shown, where F indicates the first alarm occur in that first-up group and I shows that channel is currently inhibited. N always indicates that the alarm contacts are in the (non-alarm) state. Controls he operar will respond the an alarm situation by pressing the appropriate pushbutns as follows: ilence ilences both the local horn and any sounder connected the EX OUND output. Has no effect on the visual display. his is always overridden by a new alarm. cknowledge Indicates recognition of a new alarm. he exact operation of the unit will depend on the alarm sequence selected eset eturns the system so the next alarm that occurs will be a first-up. HIGH EMP V9202 HYDOGENO OLVEN NK LEVEL HIGH est he test pushbutn simply illuminates all LED and all LCD segments ensure all displays are functioning correctly. ystem est By pressing ilence and est simultaneously the ystem est function is initiated. his will simulate an alarm on all inputs test the full operation of the complete system. erminals are also available for additional external pushbutns be connected the nnunciar Process b F N F N I N larm First larm Point Inhibited nnunciar eset Process Normal F N F N I N F N N N BU DIC V9202 HYDOGENO N F N DNGE OXIC G PEEN YEM E Programming Each channel of the annunciar can be programmed independently respond in a pre-determined manner the inputs from the alarm contacts on the plant and the operar s pushbutns. range of I alarm sequences are supported and selected by DIL switches. he following are details of the main programmable features: larm contacts may be ly open or ly closed. fter an alarm has been d the LN1000 may return aumatically as soon as the contact does so, or it may require be reset manually second time delay may be added eliminate false triggering of alarms. Each alarm can be selected in one of seven first-up groups or no group. he unit can be programmed for three different first-up sequences or ringback sequence. ingback indicates the operar when an alarm contact has returned the (non-alarm) state. he audible can be set resound after a programmable time delay. Group Outputs and larm Outputs can be configured follow the alarm logic, follow the audible or follow the alarm contacts. ll these outputs can be set drive high or low.

5 ncillary Equipment s a leading supplier of larm nnunciars and larm ystems, K Instruments is able specify, design, manufacture and commission a complete alarm system for the client s exact application and industry requirements. he parts shown below detail some key components that are used in these hazardous area alarms systems but many other options are available from the range of safe and hazardous area larm and Display Products. ML eries Intrinsically afe Isolars D- Intrinsically afe elays DB5 and DB7 Intrinsically afe ounders he ML5000 eries of larm/olenoid Drivers are suitable drive the nnunciars, ounder, Beacons and other display devices and as they are all manufactured by K Instruments have the benefit of been proven gether as a system with the appropriate field mounted device. n essential interface between safe and hazardous area equipment and different units within the hazardous area, this unique design simulates an electromechanical relay but uses only a fraction of the current required. he inputs and outputs are certified as equivalent simple apparatus so simplifying overall system design. riggered from the LN1000 these IP65 certified ounders with outputs greater than100db. he user can select from 26 different nes. eries PU Field or Panel Mount Intrinsically afe Displays D135 Intrinsically afe Beacons hese displays can be directly connected the field mounted transmitter or sensor and can be used display the desired parameter but also provide an alarm input in the LN1000 make up a complete display and alarm package. Driven from the group outputs of the LN1000 these high brightness warning Beacons will attract an operar s attention even in areas of extremely high ambient noise levels. IP65 and fully encapsulated, this rugged design is suitable for all harsh environmental conditions. range of industrial Power upplies convert from various C or DC supply voltages. D-161 Battery Backup Can be used in conjunction with the eries Power upplies.

6 equence ables Each alarm channel can be configured suit the operating sequence required as listed in the I publication nnunciar equences and pecifications (1985). ystems can be configured with different features on different alarm ways and there is no need switch the power off. he diagram below shows the most commonly used sequences. MNUL EE equence Code M UOMIC EE equence Code reset EQUENCE Normal return EQUENCE Normal EQUENCE cknowledged EQUENCE larm LCD ()N POCE b EQUENCE cknowledged LCD EQUENCE larm LCD ()N MNUL EE FI OU equence F2M-1 WIH NO UBEQUEN LM FLHING ND ILENCE PUHBUON UOMIC EE FI OU WIH FI OU FLHING ND EE PUHBUON equence F3 reset mute and POCE b EQUENCE ubsequent cknowledged EQUENCE Normal subsequent EQUENCE ubsequent larm (first out reset) silence and EQUENCE First ilenced LCD () F N first EQUENCE First larm LCD () F N silent return POCE b EQUENCE ubsequent cknowledged LCD EQUENCE Normal subsequent EQUENCE ubsequent larm LED Fast Flashing LCD ()N first out reset EQUENCE First cknowledged LED low Flashing LCD () F N first out reset first EQUENCE First larm LED Intermittent Flashing LCD () F N UOMIC EE FI OU WIH NO UBEQUEN LM E equence F1 INGBCK equence Code return EQUENCE Normal first reset EQUENCE Normal LM subsequent POCE b EQUENCE cknowledged LCD (first out reset) EQUENCE First larm LCD () F N (first out reset) () = flashing N = On when contacts in state F = First-up alarm EQUENCE ingback LED low Flashing LCD ()N LM return return POCE b EQUENCE cknowledged LCD LM EQUENCE larm LED Fast Flashing LCD ()N LM

7 Installation and Mechanical Details Cable entry at botm Engraving he legends identifying each channel are engraved on 1.6mm raffolyte cusmers requirements. hey are located behind the front panel membrane and can be changed on site if necessary. he standard colour is black text on a white background but can optionally be in the following colour combinations: Black text on orange or yellow backgrounds BCDEFGHIJK BCDEFGHIJK BCDEFH BCDEFG BCDE White text on black, red, green, blue or brown backgrounds. 2.8mm characters 4mm characters 6mm characters

8 M echnical pecification afety Description Certification EX certified EN50014:1997, EN50020:2002 and EN50284:1999 Group II, Category 1G, EEx ia IIC 4 (a 20ºC +60ºC) Location Equipment and related alarm contacts can be located in Zones 0, 1 or 2, Gas Group IIC, IIB or II, emp Class up 4 Certificate No. Baseefa02EX0184 afety Parameters Ui = 30V Ii = 165mW Pi = 1.2W Ci = 47nF Li = 0.44mH he device can be powered from an EEx ia IIC certified interface with output parameters lower than those shown above. Please see the EC ype Certificate for all the safety parameters of the inputs and outputs ecommended Interfaces I Isolars: ML5021 Inputs larm Inputs User selectable as ly open or ly closed. LN : maximum 12 inputs which must be isolated LN : maximum 32 inputs which must be isolated Outputs equence Card Outputs Ext ound: Used switch a D- I elay control external sounders Groups: wo group outputs drive D- I elays. One is configurable follow the alarm logic or alarm contacts and the second works as a reflash output which gives a 1 second pulse on the occurrence of each new alarm. larm Card Outputs Each 2 channel alarm card has two group outputs per alarm channel. hese can be configured follow the alarm logic, follow the input or follow the horn. hese outputs are ideal drive the D- I elays which in turn can be used control external safe or hazardous area mounting equipment. General upply Via suitably certified isolated interface sited in the safe area; the ML5021 is recommended. Power requirements 18-35VDC at 75m max in the ML5021 interface. EMC Compliance Immunity EN :2001 Emissions EN :2001 Environment Operating temperature: 0 60ºC rage temperature: ºC Humidity: 0-95% H, non condensing Protection (Panel Mount) Door case and case panel: ear of enclosure: Protection (Wall Mount) IP65 Connection ising clamp type terminals, for conducrs up 2.5mm 2 ecommended cable mm 2 two core with earthed screen and insulated sheath Construction Case: Front facia: Membrane: IP65 IP20 tainless steel High impact resistant polyurethane Polyester Weight 12 way panel mount: 3.8kg 32 way panel mount: 8.0kg 12 way wall mount: 20.0kg 32 way wall mount: 44.0kg bove is for the chassis c/w equence Card add 120g for each larm Card required. Inhibit Inputs Each alarm channel can be individually inhibited prevent alarms being activated. Pushbutn Inputs s standard four membrane pushbutns are fitted the front facia, however terminals are provided so remote pushbutns can be wired in the LN1000. Pushbutns are: est, cknowledge, eset, ilence. Order Code LN1000 Chassis size 12 or 32 way larm channels Number of alarm channels Mounting P = panel W1 = wall mount (supply and inputs wired terminals) W2 = wall mount (all inputs and outputs wired terminals) Due our policy of continuous product development, we reserve the right amend specifications without notice. BI IO 9001 FM YE GUNEE K Instruments Limited t James Business Park, Knaresborough, North Yorkshire, England. HG5 8PJ member of the ML Instruments Group plc elephone: +44 (0) Facsimile: +44 (0) Web: enquiry@rtkinstruments.com Doc LN1000-3