Picocells

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Picocell Cards

 

  1. Overview

    The picocell is a proprietary 25 watt paging system enclosed in an IP65 enclosure. There are many variations of the generic system due to changes to the product and configuration changes required unique to the site. Most variations are created by adding different modules onto a bus based motherboard.

    The variations are

     

    1.     PC100   

      The original first introduced in 1994. These systems have now been replaced by either a PC150 or a PC160.

    2.     PC150   

      This was the first system in 1996 to use all the modules, however is used a lot of interconnecting cables and was too compact for maintenance particularly when removing the battery. Most of these systems have been replaced with PC150 or PC160.

    3.     PC160   

      This is the current IP65 6U base version introduced in 1997. This model solved all the cable issues and provided more space for maintenance.

    4.     PC164  

      This model contained alarm cards PC2016.

    5.     3RU PC160

      This unit is a single 3U rack version and is designed to be added into 19 racks with a reasonable clean environment. It was introduced to reduce space requirements in sites with little or no wall space, or where the site provider has a preference for rack mount.

    6.     PC180  

      This model contained the ISDN interface PC2032 which is opto-isolated RS232.

    7.     PC190   

      This is a solar powered and cellular phone system.

    8.     WBB1000   

      This is the new smaller profile wireless broadband connected system introduced in 2011. All previous models were based on the 87C51 processor for PET protocol operation and POCSAG paging data generation. The 87C51 had limited processing power and was able to either process the PET packet or generate and send the POCSAG packets.

      The WBB1000 was based on products developed in the E2000 system. The processing is now performed by a processor module and is much more powerful than the previous 87C51. The WBB1000 is a commercial grade paging system capable of 50,000 messages a day. It has advanced queuing capability and POCSAG packet processing.

     

     

    The picture below is a generic PC160 picocell.

     

      

     

     

     

  2.       LED Indications

    PC205 RF Module

    • LEDs indicate
      • RF Power
      • VSWR
      • CPU

    PC203 Access Card

     

    • Needs reseating after the NT1 Plus 2 is powered up to send the “init strings” to the NT1 Plus 2.
    • If the ISDN NT1 Plus 2 looses power the default is CD active and  the Yellow LED will glow constantly to indicate the NT1 has lost its internal configuration. The card will need to be reseated when the ISDN service resumes.
    • Press Button
      •  
    • LEDs indicate
      • CPU activity
      • Tx & Rx data present
      • Carrier Detect

    PC201 DC Power

    • This card has a preset delay to give it a “delayed start”
    • LEDs indicate
      • 5V, +12V & -12V

     

    PC204 Encoder

    • Press button

    Cycle test facility – Up to 4 Baud rates

      • 512 BPS
      • 1200BPS
      • Two other rates
      • Note: The button must be presses 5 times to return the PTT to the inactive condition. It does not have a PTT timeout timer.
    • LEDs indicate
      • CPU Clear To Send    (rarely used)
      • CPU Ready To Send   (PTT to the Transmitter)
      • Data activity

     

    PC2022 Protection card

    Protection for the power supply is provided on a separate pcb.

     

    PC208 Power Supply

    Switch mode power supply and battery charger/monitor that pulse charges the battery.

    • LEDs indicate
      • AC present
      • Charger operating (Light off indicates charging)
      • DC output present
      • CPU (monitors the power)
      • Batt – This will opearte on a flat battery.

    PC2016 3 Channel Alarm Card

    3 Channel Inputs. 24 Volt Opto isolated to 1.5 KVolts. Polarity sensitive. Channel 1 at the bottom of the card. (+ve on pins 1,3,5)  Pin 1 at the bottom of the card. The lowest voltage threshold is about 12 volts.  The orange screw terminal is actually a plug and removeable for ease of wiring.

    • LEDs indicate
      • Seven segement will indicate the number 8 when the push button is depressed. The 3 channels will are represented by a single segment of the display in normal mode. If no volts present the segment is lit.
      • The push button and the alarms must be present for about 6 seconds before they are recognised by the software.

     

 

 

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Last modified: 27-Aug-2018