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16 March 20041 PXL-500 Installation Site Preparation.

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Presentation on theme: "16 March 20041 PXL-500 Installation Site Preparation."— Presentation transcript:

1 16 March PXL-500 Installation Site Preparation

2 16 March Purpose of Site Preparation Quick and efficient site setup –Ensure the site has all necessary facilities –Ensure the site has all necessary materials –Plan for placement of equipment into maintainable locations –Ensure proper site cabling –Provide safety and equipment protection

3 16 March We’ll be Covering... Earth Ground –EMI –Transients Utility Requirements –Power Outlets –Analog Phone Lines Controller Mounting –Central versus Distributed –Master Controller Reader Mounting –Enrollment Reader Cabling

4 16 March Earth Ground Required by building codes for safety Provides the best controller operating conditions –A poor earth ground degrades system performance

5 16 March Earth Ground versus EMI Reduces susceptibility to Electromagnetic Interference (EMI): –Brings all electrically neutral lines to the earth’s surface potential (zero potential) –Provides a return path to ground for electrical interference

6 16 March Electromagnetic Interference (EMI) EMI is radiated electromagnetic energy from one electrical device that may affect the operation of other electrical devices Data lines are particularly susceptible

7 16 March Common EMI Sources Power Supplies –Use only commercially built, regulated power supplies Computers/Monitors –Placing a computer monitor near a proximity reader can drastically affect the reader’s read range Power Lines –Power lines radiate EMI

8 16 March Common EMI Sources Electric motors Power transformers Air conditioning and heating units Cable routing –Separating controller power lines from data lines provides an extra level of EMI protection

9 16 March Earth Ground versus Transients Reduces susceptibility to power line transients (quick, brief surges in power): –Helps protect the controller from electrical transients such as power surges and lightning strikes

10 16 March Transients Electrical surges or spikes conducted through power, input, or output lines that can easily damage electrical components Commonly generated when electric devices are turned on or off –Door locks –Motors –Floodlights

11 16 March Suppression Using Transorbs Protects against quick surges Acts like a bi-polar diode, passes voltage up to a certain point and then clamps off, preventing higher voltages from passing through

12 16 March Suppression Using MOVs Metal-Oxide Varistor Protects relay contacts Acts like a capacitor, absorbs the initial surge and releases it slowly into the system

13 16 March Suppression Using Isolation Relays Protects against major surges by separating the path with transients from the path connected to the controller

14 16 March An Earth Ground Increases Safety A poor earth ground is a safety issue, introducing the possibility of electric shock

15 16 March Earth Ground Sources Possible earth ground sources: –copper shrouded ground rod –metal, cold water pipe –steel building framing (if framing is embedded into the earth) –electrical system ground (at the breaker/fuse box) –telephone system ground

16 16 March Utility Requirements Power Outlets Analog Phone Lines

17 16 March Utility Requirements Power Outlets –Must have one for each power supply supporting controllers, electric door locks, and all other accessories –Must be easily accessible –Must be grounded

18 16 March Utility Requirements Analog Phone Lines –Two are needed if communication between access control network and host computer is done via modems

19 16 March Controller Mounting Review site requirements to determine where controllers should be mounted –Costs (installation and maintenance) versus controller security There are two types of controller mounting to consider –Central Mounting –Distributed Mounting

20 16 March Central Controller Mounting All controllers mounted in one location (i.e. a facilities closet, telco room, server room)

21 16 March Central Controller Mounting PROs –Easier controller maintenance –Can provide greater security –Shorter cable runs for the controller network and for unit power –Units can share a larger power supply

22 16 March Central Controller Mounting CONs –Longer cable runs to support readers, inputs, outputs, door lock, etc. –May use much more cable than Distributed Mounting

23 16 March Distributed Controller Mounting Places a controller by each door

24 16 March Distributed Controller Mounting PROs –Controller/door proximity –Easier to troubleshoot –Shorter cable runs to support readers, inputs, outputs, door lock, etc. –May use less cable than Central Mounting

25 16 March Distributed Controller Mounting CONs –Longer cable run for the controller network –Needs individual power supplies for each controller –Harder to maintain controllers –Harder to secure controllers

26 16 March Master Controller Location Consider locating the master controller in a more easily accessible place: Advantages –easier to perform diagnostics (particularly if an LCD-1 is installed on the controller) –easier PC to network access –enrollment reader access for presentation enrollment and for lost card identification

27 16 March Controller Mounting Mount controllers in environmentally suitable locations –For indoor controller installations - mount enclosures on any type of solid wall surface –For outdoor controller installations - controllers must be in water tight, weatherproof enclosures

28 16 March Controller Mounting Easiest way to mark drilling holes for the enclosure is to have an associate hold the enclosure in place and mark the drilling holes with a pencil

29 16 March Controller Mounting Individual controller panel PCBs can be mounted the same way, but mounting must be done using standoffs to provide PCB/wall clearance

30 16 March Controller Mounting Note the cable routes to the controller and remove the enclosure knockouts that best accommodate the cable routes

31 16 March Enrollment Reader The “A” reader on the Master Controller –Used for presentation enrollment –Not needed if all cards are block enrolled

32 16 March Enrollment Reader Place the reader near the host computer for ease of presentation enrollment –But not too close because EMI from the computer will affect the reader

33 16 March Enrollment Reader Can also be used for access control if desired, but: –Proximity to host computer may be an issue; starting the enrollment process, then running to the reader to complete the enrollment –Access requests are ignored during presentation enrollment which may confuse users The Show Face and ID Card functions also use the Enrollment Reader

34 16 March Reader Mounting Users need clear access to readers –It should not be mounted in a way that affects traffic paths Be aware of Americans with Disabilities Act (ADA) requirements that can affect where you place the reader

35 16 March Cabling You must use proper cabling for best operating conditions –Shielded to minimize EMI –Proper gauge to minimize voltage drop over long run lengths –Routed in a way that allows for maintenance

36 16 March Cable Requirements RS Controller to Host Computer –Three conductor, shielded, stranded, AWG 24 (or larger gauge) –50 feet maximum length (per RS-232 specification)

37 16 March Cable Requirements RS-485 – Controller to Controller Network –Two conductor, shielded, stranded, twisted pair, AWG 24 (or larger gauge) –16,000 feet maximum network length when installed using Keri networking guidelines

38 16 March Cable Requirements Power –Two conductor, stranded, AWG 18 (or larger gauge) –200 feet maximum length Watch for a drop in voltage over long power runs due to resistance in the cable length The controller must have 12 VDC at the controller for proper operation

39 16 March Cable Requirements Earth Ground –Single conductor, AWG 18 (or larger gauge)

40 16 March Cable Requirements Inputs and Outputs –Two conductor, stranded, AWG 22 (or larger gauge) –The lock output relay may require a heavier gauge of wire depending upon the current demands of the lock and the length of the wiring run

41 16 March When Routing Cable DO –Route cables in accessible areas for easy maintenance –Use transient suppression across electric devices attached to the PXL-500 or SB-593 output relays (at the device itself) –Use an isolation relay if connecting to a parking gate, turnstile, elevator car, or any application using a large electric motor (at the device itself)

42 16 March When Routing Cable DO NOT –Route cables near EMI sources Cables can act as antennas, receiving EMI that affects controller operation EMI sources include power lines (including air conditioning or heating lines), door lock and power supply lines, network data lines –Stretch cables –Route cables over sharp edges or hot objects


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