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Summary of Contents for Versitron F2702
- Page 1 F270X Fiber Optic Tele-Data Modem Technical Manual Revision B Copyright May 2002 VERSITRON, Inc. 83 Albe Drive / Suite C Newark, DE 19702 www.versitron.com A020519685...
- Page 2 Purchases made prior to January 2001 are warranted for a period of one year from date of delivery. VERSITRON reserves the right to repair or, at our option, replace parts which during normal usage prove to be defective during the warranty period provided that: 1.
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Page 3: Table Of Contents
POWER REQUIREMENTS.................... 8 2.4.1 Installation with AC Power ....................8 2.4.2 Installation with DC Power ....................8 INTERFACE WIRING ....................9 2.5.1 Fiber Optic Cable Installation....................10 INITIAL CHECKOUT PROCEDURE................10 SECTION 3: OPERATION INTRODUCTION ......................11 STATUS INDICATORS / AUDIBLE ALARM...............11 www.versitron.com... - Page 4 4.3.2 Loop Current Detection Circuit..................13 4.3.3 Reverse Battery Detection Circuit ..................13 4.3.4 Analog-to-Digital Conversion....................13 4.3.5 CPLD (Mux / Demux)......................13 4.3.6 RS-485 / RS-422 Data Transmission Circuit..............14 4.3.7 Fiber Optic / Copper Transceiver Circuit ................14 SECTION 5: MAINTENANCE AND TROUBLESHOOTING INTRODUCTION ......................15 FAULT ISOLATION......................15 www.versitron.com...
- Page 5 SW2 SWITCH SETTINGS ..................... 7 LINE IMPEDANCE JUMPER SETTINGS ..............7 (J4) TELEPHONE / ANALOG WIRING................ 9 (P1) CHASSIS POWER / ALARM WIRING..............9 (J1) RS-485 / RS-422 DATA TRANSMISSION WIRING ..........10 COPPER INTERFACE WIRING ...................10 STATUS INDICATORS ....................11 NONOPERATIONAL INDICATORS ................15 www.versitron.com...
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Page 6: Section 1: Description Of Equipment
Model Part Description Number Number Exchange side tele-data modem for audio and/or RS-485 or RS-422 data, F2702 19685-02 multimode, 850nm ST optics, 2 Km operational distance. Exchange side tele-data modem for audio and/or RS-485 or RS-422 data, F2704 19685-04 multimode, 1300nm ST optics, 8 Km operational distance. -
Page 7: Audio And Data Transmission Characteristics
Model F270X / F271X FOM II Series Tele-Data Modems measure 7.0 x 0.85 x 11.8in, HWD, (17.78 x 2.2 x 29.98cm) and are designed to be mounted in a variety of VERSITRON enclosures and chassis (see Table 1 for dimensions of enclosures and chassis). "Desktop" options include both single- and dual-card enclosures. -
Page 8: Front View, F270X Modem
FIGURE 1.1 FRONT VIEW, F270X MODEM FIGURE 1.2 REAR VIEW, F270X MODEM RJ11 RJ45 Power Jack 12Pin Connector RJ11 Audio Jack Data Jack 12VDC Used For HF-20 Chassis Optical Interface Copper Interface (2-Wire) (4-Wire) FIGURE 1.3 BACK PANEL, F270X MODEM Page 3 www.versitron.com... -
Page 9: Application Example
4-Wire Twisted Pair RS-485 / RS-422 F271X F271X Fiber Interface Subscriber Subscriber Modem Modem Copper Interface 2-Wire Twisted Pair Where, 2-Wire Twisted Pair For Analog Signal 4-Wire Twisted Pair For Digital Signal Duplex Fiber-optic Cable FIGURE 1.4 APPLICATION EXAMPLE Page 4 www.versitron.com... -
Page 10: Tele-Data Modem Specifications
45 to 55 VDC Loop Current 20mA max (off hook) Ring Signal 80-150VAC, 15 to 68Hz 600 Ω or 900 Ω Line Impedance (Jumper selectable) Fiber Optic Interface Models F2702 F2712 F2704 F2714 F2705 F2715 Wavelength Multimode 850nm Multimode 1300nm... -
Page 11: Section 2: Installation
SW1-3 RS-485/RS-422 transmitter outputs RS-485/RS-422 transmitter outputs SW1-4 Not used Not used * Note: Factory setting for all SW1 positions is Off. * Note: Do not set SW1-1 in the On position. TABLE 2: SW1 SWITCH SETTINGS Page 6 www.versitron.com... -
Page 12: Fiber Optic Or Copper Transceiver Network Settings
2.3.2 Fiber Optic or Copper Transceiver Network Settings A new feature to the VERSITRON class of Modems is the ability of the F270X and F271X Series Modems to multiplex data (RS-485 or RS-422) and analog (Telephone audio signal) onto a fiber OR copper network, depending on the application. -
Page 13: Default Jumper
+12 to +18 VDC. 2.4.1 Installation with AC Power Before inserting the VERSITRON power transformer, PSAC08 (US) or PSAC09 (EUR), into an AC power source, the plug should be connected to the Modem. There are no special tools required. -
Page 14: Interface Wiring
Pin Number Signal Designation +12 VDC +12 VDC Signal Ground Signal Ground Signal Ground Frame Ground (Chassis) System Alarm Interface Signal Ground Signal Ground +12 VDC +12 VDC +12 VDC TABLE 7: (P1) CHASSIS POWER / ALARM WIRING Page 9 www.versitron.com... -
Page 15: Fiber Optic Cable Installation
4. Verify the switch settings for the circuit configuration. (i.e. copper or fiber optic network interface). If a malfunction is detected during the initial checkout procedure, refer to Section 5 for information on isolating the malfunction in the unit. Page 10 www.versitron.com... -
Page 16: Section 3: Operation
Indicates Reverse Battery condition when lit Indicates the following when lit: +5V power supply circuit is not working –5V charge pump circuit is not working +12V Power supply is not working A problem exists with data transmission TABLE 10: STATUS INDICATORS Page 11 www.versitron.com... -
Page 17: Introduction
These Modems are designed to work with F271X subscriber side Modems in pairs and interface with audio and RS-485 or RS-422 data grade signals. These units are housed in VERSITRON FOM II chassis: HF-1, HF-2, HF-2SS and HF-20. Chassis descriptions are found in paragraph 1.2.3. -
Page 18: Functional Description
The CPLD is used to mux / demux the digitized audio and RS-485 or RS-422 digital data signal. In essence, it is an asynchronous-to-synchronous converter encoded using proprietary VHDL programming designed at VERSITRON. A 20MHz Oscillator, Y1, provides the clock input to the CPLD. Page 13... -
Page 19: Rs-485 / Rs-422 Data Transmission Circuit
U17, a full duplex RS-485 / RS-422 interface IC, receives the signal from a 4-wire UTP. The RS-485 or RS-422 data signal is converted into a TTL data signal and is transmitted to the CPLD, U1. Here the multiplexed audio and data signals are de-multiplexed and sent to their respective destinations. Page 14 www.versitron.com... -
Page 20: Section 5: Maintenance And Troubleshooting
These units are not equipped with redundancy. Therefore, a failure in one of these units would interrupt service. FAULT ISOLATION The steps in Table 12 should be taken to check a nonoperating Modem. Contact VERSITRON Customer Service for additional diagnostic assistance or to arrange for repair as necessary. STATUS INDICATOR...
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