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Summary of Contents for Positron Teleline Isolator 7501-16A
- Page 1 Plug-in OPX Card 7501-16A, B and C Description and Installation...
- Page 2 The information contained in this document is the property of Positron Inc. Except as specifically authorized in writing by Positron Inc., the holder of this document: 1) shall keep all information contained herein confidential and shall protect same in whole or in part from the disclosure and dissemination to all third parties, and 2) shall use same for operating and maintenance purposes only.
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Page 3: Table Of Contents
Contents The Plug-in OPX Card ............1 Applications . -
Page 5: The Plug-In Opx Card
7501-16A, B, C (22 pages) Plug-in OPX Card The Plug-in OPX Card The Plug-in Off Premise Extension (OPX) Card is used to provide high voltage isolation for a wide variety of telephone voice grade applications involving the bi-directional transmission of AC and DC voltage.The unit is a plug-in card designed for use with the Teleline Isolator multi-card shelf. - Page 6 Figure 1 Model 7501-16A Component Layout (Only Major Components Shown) 2" 7-7/16" STATION SIDE -24 V dc PCB +130 V dc (RU GEN from shelf) POSITRON GROUND -48 Vdc from shelf TIP (+) RING (-) STATION MONITORING JACK EQUALIZE TRIM POTS 12"...
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Page 7: Applications
7501-16A, B, C Plug-in OPX Card Applications The applications of the OPX Card include the following: • OPX. For an illustration of this application, refer to Figure 3. • Direct Inward Dial (DID) loop start. For an illustration of this application, refer to Figure 4. - Page 8 7501-16A, B, C Plug-in OPX Card Figure 2 High Voltage Interface Applications CENTRAL OFFICE 300 Volt Point Metal Conduit Communications Cable HIGH VOLTAGE INTERFACE Plug-in OPX Card Conduit Model 7501-16A, B or C Telephone, PBX Lightning Fax or Modem 300 Volt Arrestor Point SUBSTATION...
- Page 9 7501-16A, B, C Plug-in OPX Card Figure 3 Typical Off Premises Extension (OPX) Application STATION A EXT. OPX CARD ISOLATION CARD MODEL 751321 STATION B *Note: The isolation card is only required if a ground potential rise is possible at the remote site (Station B). If Station B is not a power plant, the telephone card can be omitted.
- Page 10 7501-16A, B, C Plug-in OPX Card Figure 4 Typical Direct Inward Dial (DID) Application SUBSTATION Ring OPX CARD CENTRAL OFFICE...
- Page 11 7501-16A, B, C Plug-in OPX Card Figure 5 Typical Ring Down Application STATION A RING GENERATOR OPX CARD OPX CARD RING GENERATOR STATION B...
- Page 12 7501-16A, B, C Plug-in OPX Card Figure 6 Typical Radio Keying Application OPX CARD RADIO SUBSTATION...
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Page 13: Hardware Description
7501-16A, B, C Plug-in OPX Card Hardware Description The OPX Card is comprised of two sides. The Station side is located on the upper portion of the card and the CO side is located on the lower portion of the card. The Station side is separated from the CO side by the isolation transformers which create a 4¼... - Page 14 7501-16A, B, C Plug-in OPX Card The following is a description of the elements of the OPX Card block diagram. Transient Protection Blocks The Transient Protection Blocks each consist of a varistor, and are designed to protect their respective circuitry (Station or CO side) from transients. Timing Block The Timing Block consists of a crystal oscillator which provides the switching frequency for the isolation devices.
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Page 15: Technical Specifications
7501-16A, B, C Plug-in OPX Card Technical Specifications For a listing of the card’s electrical specifications, refer to Table 1. For a listing of the card’s physical specifications, refer to Table 2. Table 1 Electrical Specifications (measured at 77°F or 25°C, 50% R.H.) Parameter Specifications... - Page 16 7501-16A, B, C Plug-in OPX Card Parameter Specifications IMPEDANCE REFLECTION Impedances on Impedances on Impedances on either side appear either side appear either side appear on the opposite on the opposite on the opposite side multiplied side multiplied side multiplied by 90% to 110% by 90% to 110% by 90% to 110%...
- Page 17 7501-16A, B, C Plug-in OPX Card Table 2 Physical Specifications Model 7501-16A, B and C Parameter Specifications Operating temperature range +32°F to +122°F (0°C to 50°C) Relative humidity 95% (non-condensing) Height 12” (30.48 cm) Width 2” (5.08 cm) Depth 7-7/16” (18.89 cm) Weight 3.488 lbs (1.582 kg)
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Page 18: Installation
7501-16A, B, C Plug-in OPX Card Installation The OPX Card plugs into any slot of the Teleline Three, Five or Eight-card Shelf. However, the card must be installed into the slot which has been pre-wired according to the installation diagram of the specific shelf. To view the Ground Start Coin Circuit using two 7501-16 cards, refer to Figure 8. - Page 19 7501-16A, B, C Plug-in OPX Card To view the OPX trunk using single 7501-16 card, refer to Figure 9. Figure 9 OPX Trunk Using Single 7501-16 Card Note Type 7501-16 cards can be powered with either -24V, -48V or 130 V dc; the suffix A, B or C specifies the operating voltage the card is designed for.
- Page 20 Failure to follow ESD precautions may void the warranty. For further information concerning ESD precautions, contact Positron’s Customer Support department. • The remote ground must be brought in on a separate pair. Do not use the cable sheath.
- Page 21 7501-16A, B, C Plug-in OPX Card Note The OPX Card was factory calibrated prior to shipping, and the “mA EQUALIZE” trimpots should not be adjusted. The “mA STATION” and “mA CO” jacks are provided for monitoring purposes only. Unpack the OPX Card from its protective box and shielded anti-static bag. Confirm that the isolation unit is an OPX Card by identifying the name and model number on the faceplate of the card.
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Page 22: Service And Support
Arrangements and pricing information regarding field assistance may be obtained by contacting the Technical Customer Support department. Please contact Positron for scheduling at least four weeks prior to the actual requested visit date. Customer Training Positron offers full customer training courses, as requested. - Page 23 Positron Inc. offers repair services by which customers can count on timely and quality repairs, regardless of customer location. All warranty repairs are performed at no cost. Positron reserves the right to repair or replace any equipment which has been found to be defective.
- Page 24 Plug-in OPX Card Ordering Information Positron’s Teleline equipment can be ordered by telephone, facsimile, or by mail. All orders should be directed to the Positron Inside Sales department. Ordering by telephone, or facsimile will eliminate any delays arising from postal services.
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