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Nexus 21 A1557 - page 1
Document Ref: Nex 8inst.doc/Rev0 0 9.07.00 Page 1 of 30 Originator MC Chec ked by AC___Approved by JBJ__ Nexus 1-8 Loop (A1557) Analogue Addressable Control Panel Installation and Commissioning Manual Contents Page 1.0 Introduction and Guided Tour 1 2.0 Cabinet Installation 7 3.0 Engineer’s Functions 9 4.0 Panel Check 1 0 5.0 Panel Configuration ...
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Nexus 21 A1557 - page 2
Document Ref: N ex8inst.doc/Rev 0 09.07.00 Page 2 of 30 Originator MC Check ed by AC__ 1.1.1 Exploded View and Mechanic al Data/Text Identifica tion 1.1.2 User Controls & Indications Display board assembly mounted on removable door Printer Space for Internal 12AH Battery Set Power Supply Board Motherboard Expansion Motherboard Loop Cards Expans ...
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Nexus 21 A1557 - page 3
Document Ref: N ex8inst.doc/Rev 0 09.07.00 Page 3 of 30 Originator MC Check ed by AC__ 1.1.3 Display Print ed Circuit B oards as View ed from Ins ide Cabinet 1.1.5 A1 557 Motherboa rd Showing Essential Engineering Components B/+ A/- SCN B/+ A/- SCN FL T 24V 0V PROC RESET NODE ADDRESS DIL SWITCH EPROM WITH SOFTWARE REFERENCE PRINTER INTERF A CE ZONE ...
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Nexus 21 A1557 - page 4
Document Ref: N ex8inst.doc/Rev 0 09.07.00 Page 4 of 30 Originator MC Check ed by AC__ Lithium Battery Caution - danger of explosion if battery is inco rrectly replaced. Replac e only with same or equivalent type recommend ed by the manufacturer. Dispo se of used batteries according to the manufacturers instructions. This battery shou ld be replace ...
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Nexus 21 A1557 - page 5
Document Ref: N ex8inst.doc/Rev 0 09.07.00 Page 5 of 30 Originator MC Check ed by AC__ A1557 Field Terminal List [Listed alo ng the top edge of the PCB from left to right] Terminal Ident. Function Terminal Ident. Function Aux Fire NO 1 Fire rela y normal ly open 1 Alarm 1 + Sounder circuit 1 + [Active polari ty] NC1 Fire relay normally closed 1 - S ...
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Nexus 21 A1557 - page 6
Document Ref: N ex8inst.doc/Rev 0 09.07.00 Page 6 of 30 Originator MC Check ed by AC__ 1.1.7 Loop Card Expansion Moth erboard 1.1.8 Program mable Expansion Boards Up to 31 A1535 (r elay) and A1536 (alar m) programm able expansion b o ards m ay be connected to the Nexus 1-8 loop (A1557) p anel. Two boards m ay be housed internally, the r emaind er r ...
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Nexus 21 A1557 - page 7
Document Ref: N ex8inst.doc/Rev 0 09.07.00 Page 7 of 30 Originator MC Check ed by AC__ 2.0 Cabinet Installation WARNING: Please read this section completely before comme ncing installat ion. Prior to commencing installation of the control panel, ensure that adequate precautions are taken against static damage to the sensitive electronic components ...
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Nexus 21 A1557 - page 8
Document Ref: N ex8inst.doc/Rev 0 09.07.00 Page 8 of 30 Originator MC Check ed by AC__ DANGER: Do not incinerate batteries. If placed in a fire, the batteries may rupture, with the potential to release hazardo us gases and elect rolyte. VRLA batteries contain substances harmful to the environme nt. Exhausted batteries must be recycled. Return them ...
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Nexus 21 A1557 - page 9
Document Ref: N ex8inst.doc/Rev 0 09.07.00 Page 9 of 30 Originator MC Check ed by AC__ 3.0 Engineer’s Functions A numbe r of engine ering functions are pr ovided by the control unit in orde r to allow the sy stem to be configu red specifically to accommodate site requiremen ts. Further functio ns are provided to assist in commissioning and servic ...
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Nexus 21 A1557 - page 10
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 10 of 30 Originator MC Check ed by AC__ 4.0 Panel Check Ensure that the main s supply h as been inspected an d tested in acco rdance with BS583 9 Part 1 and the curre nt IEE regu lations and that the system is co rrectly earth ed. 4.1 Leave all test resistors in p lace and con nect the 230V mains su pp ...
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Nexus 21 A1557 - page 11
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 11 of 30 Originator MC Check ed by AC__ used on the loop (i.e. ionisation smoke, optic al smoke, or heat sensor) 5:DEVICE STATUS The analogue value can be identified & the detector self-tested, the detector LED an d the Remote LED ca n be turned on either in the enabled mode or th e disabled mode. ...
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Nexus 21 A1557 - page 12
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 12 of 30 Originator MC Check ed by AC__ Step 4 - Select the number of the engineer’s facility required by pressi ng the corr esponding number button. 5.4 Setting Time & Date At Step 4 within the Engineer ’s Me nu (see Section 5.3 above), select 1:SET TIM E/DATE. S E L E C T L E V E L 2 O P T I ...
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Nexus 21 A1557 - page 13
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 13 of 30 Originator MC Check ed by AC__ 0 1 : 0 0 1 D E - I S O L A T E D 1 . I S O 2 . D E - I S O # = Q U I T Press 2 to de-isolate Press 1 to isolate Selecting Option 2 . PANEL INPUTS on th e ISOLATION FACILI TY screen reve als the following wher e the user is prompted to enter the input number foll ...
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Nexus 21 A1557 - page 14
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 14 of 30 Originator MC Check ed by AC__ Selecting this option provides all the inte rrogation and control functions. A ll output functions are disabled and on ly the chosen de vice is being polled. This allows sen sor devices to be put into the test mode without alarms, etc. being raised and allows obs ...
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Nexus 21 A1557 - page 15
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 15 of 30 Originator MC Check ed by AC__ The keyp ad keys 1, 2 & 3 become control switches for the 3 con trol panel command bits. (Indicated by the numbers 12 3 under the CMD indicators ). Pressing k ey 1 causes comm and bit 1 to toggle between 0 and 1, ke y 2 for bit 2 and key 3 for bit 3. The 3 co ...
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Nexus 21 A1557 - page 16
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 16 of 30 Originator MC Check ed by AC__ 025 16 BGU 2 123 21 HEAT 4 END OF LOOP REPORT 5.9 Loop Contents At Step 4 within the Engineer ’s Me nu (see Section 5.3 above) , select 6:L OOP CONTEN TS. Selecting option 6 causes the display to show a lis t o f the devices cu rren tly configured without actua ...
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Nexus 21 A1557 - page 17
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 17 of 30 Originator MC Check ed by AC__ This gives the option of adjusting the alert trip level of individual devi ces to suit particular installation conditions. To adjust the trip level fo llow the procedure below: At Step 4 within the E ngineer’s Me nu (see Sectio n 5.3 above), select 0:E XTENDED ...
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Nexus 21 A1557 - page 18
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 18 of 30 Originator MC Check ed by AC__ At Step 4 w ithin the Engineer’s Menu (see Section 5.3 above), select 0:EXTEN DED MEN U. Select 3:PANEL DELAY. This will reveal the following: Setting the time period of day or night during whic h, if a fire condition occurre d, the outputs w ould be delayed. * ...
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Nexus 21 A1557 - page 19
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 19 of 30 Originator MC Check ed by AC__ has its own DIL switch address setting. These ad dresses must be set in accordance with the repeater panel manual. The panel’s own display DIL switch setting must not be changed. * N U M B E R O F D I S P L A Y S * Displays current status D I S P L A Y 0 1_ * = ...
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Nexus 21 A1557 - page 20
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 20 of 30 Originator MC Check ed by AC__ WARNING: We strongly recommend that no local cause/effect editin g should be attempted without the use of the pc down-load facility due to the extensive range of options available. However, if direct panel programming is unavoidable, a separa te document entitled ...
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Nexus 21 A1557 - page 21
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 21 of 30 Originator MC Check ed by AC__ It is recommended that th e electrical installer is made availa ble until basic wiring continuity is proven. A minimum of two person s (e.g. engin eer and mate) is r ecommended for effi cient commissioning. 6.2 An Overview of the Commissioni ng Procedure The appr ...
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Nexus 21 A1557 - page 22
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 22 of 30 Originator MC Check ed by AC__ (i) Remove the resistor from the first alarm ci rcuit terminal an d connect th e first alarm circuit wiring to the termin als, observing co rrect polarity. Check that any alarm fault indications clear after a few second s. (ii) Press the “Evacuate” switch . C ...
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Nexus 21 A1557 - page 23
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 23 of 30 Originator MC Check ed by AC__ Refer to the Installation & Commi ssi oning Manual s for these boards. 6.6 Auxiliary Circuits Any auxiliary circuits or equipment which is not supplied as a standard part of the fire alarm panel is the responsibility of th e installer and must be tested for s ...
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Nexus 21 A1557 - page 24
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 24 of 30 Originator MC Check ed by AC__ Appendices i Technical Specifications NOTE: Due to the wide scope of panel options, we strongly recommend the use of our battery calculation chart which is available on PC disk or as hard copy. Th e information below should not be used to calculate standby batte ...
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Nexus 21 A1557 - page 25
Document Ref: Nex 8inst.doc/Rev0 09.07.00 Page 25 of 30 Originator MC Check ed by AC__ NOTES: 1. W e strongly reco mmend the use of th e Ba ttery and Loop calculat or for assessing the correct size of the standby batteries and correct loop function in all conditions. 2. Quiescent current is stated assuming m ain s failure conditions, th erefore the ...
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Nexus 21 A1557 - page 26
Document Ref: Ne x8inst.doc/R ev0 09.07.00 Page 26 of 30 Originator MC Checked by AC___Appro ved by JBJ__ iii Compatible Lo op Devices and Panel Responses The following ta ble shows all d evices compatib le with the panel. It s hows the panel’s resp onse to events from ea ch device type, and indicates the change in analogue value and input bits t ...
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Nexus 21 A1557 - page 27
Document Ref: N ex8inst.doc/Re v0 09.07. 00 Page 27 of 30 Originat or MC Checked by AC__ Device type Type Code Condition Panel response An alogue Value Status bits (210) Output bits Default cause and effect Comments Series 90 3-w ay I/O analogue u nit 2 Quiescent Input 1 o perated Input 2 o perated Input 3 o perated None Fire Input Remote fault AV ...
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Nexus 21 A1557 - page 28
Document Ref: N ex8inst.doc/Re v0 09.07. 00 Page 28 of 30 Originat or MC Checked by AC__ Device type Type Code Condition Panel response An alogue Value Status bits (210) Output bits Default cause and effect Comments Series 90 zon e monitor 4 Quiescent Fire Circuit fault None Fire Remote fault AV = 16 AV = 64 AV = 4 Echo output bits 0 = reset 1 = te ...
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Nexus 21 A1557 - page 29
Document Ref: N ex8inst.doc/Re v0 09.07. 00 Page 29 of 30 Originat or MC Checked by AC__ Device type Type Code Condition Panel response An alogue Value Status bits (210) Output bits Default cause and effect Comments Series 90 optical smoke 5 Quiescent Fire Alert Fault None Fire Alert Data fault AV = 8 to 44 AV = 5 5 to 127 AV = 45 to 54 AV = 0 to 7 ...
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Nexus 21 A1557 - page 30
Document Ref: N ex8inst.doc/Re v0 09.07. 00 Page 30 of 30 Originat or MC Checked by AC__ Device type Type Code Condition Panel response An alogue Value Status bits (210) Output bits Default cause and effect Comments XP95 heat detector high 6 Quiescent Fire Alert Fault None Fire Alert Data fault AV = 8 to 44 AV = 5 5 to 127 AV = 45 to 54 AV = 0 to 7 ...
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