FLD2SA-1S FLD2SA-2S Manual

Transcription

1 FLD2SA-1S FLD2SA-2S Manual Dual Port Fiber Optic Modem Standalone A Rev. A For FLD2SA A Rev. A and newer Serial numbers FLD SA and up

2 GDI FLD2SA-1S & FLD2SA-2S Manual A Rev. A Proprietary Data This document contains confidential, proprietary data with all rights and titles reserved by GDI Communications LLC. By accepting this document, the recipient assumes custody herof and agrees not to dislcose this data or any portion of this data to any unauthorized person without the prior written consent of GDI Communications LLC. Recipient further agrees not to incorporate these drawings, specifications or technical information, in whole or in part, in any other product or endeavor. THIS LEGEND SHALL BE INCLUDED ON ANY REPRODUCTION OF THIS DOCUMENT GDI COMMUNICATIONS, LLC 879 Deming Way Sparks, NV Phone (775) Fax (775)

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5 TABLE OF CONTENTS GLOSSARY... 1 GENERAL DESCRIPTION... 2 GENERAL CHARACTERISTICS... 4 RJ45 TERMINATION TABLE... 4 DB9F TERMINATION TABLE... 4 INSTALLATION... 6 CONFIGURATION SWITCHES... 6 TYPICAL SYSTEM OPERATION TYPICAL SYSTEM CONNECTIONS: ADJUSTMENTS... 14

6 1 GLOSSARY Anti-Streaming A function on GDI modems that prevents a Host from transmitting continuously. DCD Data Carrier Detect. An EIA RS- 232D control signal that can be used to gate RXD to a DTE. DCE Data Communications Equipment. A device that converts data from a DTE to a transport stream. DTE Data Terminal Equipment. A device that initiates communication over RS232 lines. Detector An optical port that converts coherent light waves, received from a fiber optic cable, to electrical data. Emitter An optical port that converts electrical data to coherent light waves for transmission through a fiber optic cable. CTS Clear To Send. A EIA RS-232D control signal that can be used to gate TXD data from a DTE. Optical Port A data communications portal through which electrical data is transmuted to single frequency coherent light waves and then transmitted through a fiber optic cable. 0 dbm Represents the signal level required to produce 1mw in a 600Ω load. Surface mount parts Electronic parts that are designed to be soldered to pads instead of vias. RXD Receive Data. An EIA RS-232D data signal that transfers information in form of binary data to a DTE. RTS Request To send. An EIA RS- 232D control signal that can be used to gate TXD to a DTE. The DTE asserts RTS and then waits for the DCE to respond with CTS. NiMH A rechargeable battery that uses Nickel-Hydrogen chemistry. The AA cells have a voltage of 1.2vdc. Full duplex A communication system where data can be transmitted in both directions at the same time. Half duplex - A communication system where data can be transmitted in only one direction at a time. Host Any DTE device.

7 2 GENERAL DESCRIPTION The FLD2SA has four fiber optic ports: two emitters and two detectors. This allows a standard daisy chain configuration with two fiber optic cables running between each modem. Since the signal is regenerated at each modem there is no physical limitation on the amount of remote intersections that can be tied on a fiber network. The main communications port, DB9F, is switch settable for either RS-232 or RS-485. The mode is indicated on the rear panel by LEDs. The FLD2SA is configured at the factory for either 850nm Multi-Mode operation or 1310nm Single-Mode operation. Both versions can operate at 1200bps to 115kbps. The standard versions of the FLD2SA are equipped with battery backup. The rechargeable NiMH Batteries that can power the FLD2SA for 6 hours after power loss. This will maintain communications through an intersection that has lost power. The Anti-Streaming function prevents a single controller from continuously transmitting. The Anti-Streaming time can be adjusted using the rotary switch (S1) located at the rear of the modem. Rotate S1 to 0 to deactivate Anti- Streaming. This allows the technician to see if a controller ever had a problem and allows the controller to operate normally if the problem clears itself. The NiMH batteries are assembled in a DC power pack on the PC Board and are easily replaceable. The charge current and voltage are continuously monitored to prevent overcharging and over-discharging the batteries. To protect the batteries if the temperature drops to 0 C or less, the charger is disabled. When the battery is fully charged, a trickle charger is activated and keeps it fully charged at all times. The status LED indicates whether the full charger is on (solid red) or when the trickle charger is on (Turning on and off slowly). The FLD2SA has the option of using the presence of data coming from upstream to control CTS. This will prevent data collisions between two controllers. The CTS signal will hold off transmission from the attached controller until the data from upstream has passed through. Anti-Streaming is automatically reset when the controller stops transmitting. However, the Anti-Streaming LED will remain on until the reset button (S3) is pushed.

8 3 An expansion port (RJ45 connector) allows you to connect to another FLD2SA. This effectively puts two modems in parallel. If both modems are set to Master mode, four networks can be accessed. When connecting between two next generation FLD2SA units, no special cable is required. An off-the-shelf CAT5 patch cable can be used, but an internal switch must be set so one unit acts like a DTE and the connected unit responds like a DCE. The signals between units are RS-232, and can be located up to 50 feet apart. A custom cable is required when connecting to an older generation FLD2.

9 4 General Characteristics PHYSICAL CASE x 5.75 x 1.5 Weight ~2 lbs. POWER: Voltage VAC Hz Power..<5 Watts ENVIRONMENTAL: TEMP:..-37 to +74 C HUMIDITY.5-95% non-cond. BATTERY: TYPE:..NiMH (5 AA Cells) Or 9 V Lithium Holdup time..~12 Hours RJ45 Termination Table Pin Function SGND 5 RXD 6 TXD DB9F Termination Table EIA-232 EIA-485 Pin Function Function 1 DCD* TXD+ 2 RXD TXD- 3 TXD RXD+ 4 RXD- 5 GND GND 6 RTS+ 7 RTS RTS- 8 CTS CTS+ 9 CTS- Charge time ma

10 5 FIBER OPTIC SECTION: PWR DC power is up Receiver Sensitivity: 850 nm Multi-Mode. -40 dbm 1300 nm Single-Mode..-33 dbm Transmitter Power: LED 850 nm Multi-Mode.-15 dbm 1310 nm Single-Mode..-21 dbm (std) CONNECTORS: 850 nm Multi-Mode ST 1300 nm Single-Mode LED.ST FC is opt. INDICATORS: TXD..Transmit data from the Local or Master RXD.Receive Data to the Local Or Master EM1..Data is being sent on Emitter 1 EM2..Data is being sent on Emitter 2 D1..Data is being received On Detector 1 D2..Data is being received On Detector 2 A-STR Anti-streaming has Tripped BAT Battery Charge Status Steady on --- Charging Slow Blinking --- Trickle Charge

11 6 INSTALLATION Prior to installation, the FLD2SA must be configured to match the system requirements While this can be performed with the power on to the controller, it is recommended that the power be first turned off. Switch 1: When set to MASTER mode, the two fiber ports are in a parallel arrangement. Both emitters are driven with TXD data from the host. The data from both detectors drive RXD back to the hose. Then turn the power on if it was previously turned off. Configuration Switches: When set to REMOTE mode, the two fiber ports are in a serial configuration. DET1 drives EM2 and DET2 drive EM1. The host s TXD data is routed to EM1 only and only DET1 drives the host s RXD data. Switch 2: In the Disable position data from detector 2 is blocked from the RXD circuit. In the Enable position, data from detector 2 is routed to the RXD circuit.

12 7 Switch 3 and Switch 4: Switch 3 turns ON, or OFF, the gating of CTS by the DET2 data. Normally, CTS is triggered by RTS and in a typical Polling application the FLD2SA will need no further data routing. However, for other applications, it may be necessary to turn CTS off when data is being transmitted from an upstream FLD2. This prevents data collisions in the downstream fiber path. The following waveform shows how this works: Normally, when RTS is asserted, CTS is asserted and the controller is enabled to transmit.

13 8 But, when switch 5 is in the ON position, CTS is held off until the upstream controller has finished transmitting and the DET2 data is no longer present. The time between when DET2 data stops and CTS is asserted is set by Switch 4. The STD time is 11ms and the FAST timing is 7ms.

14 9 Switch 5: The directionality of the Data and control signals on the Expansion port RJ45 can be set to DCE or DTE depending on the topology. A network can be expanded by connecting two FLDSAs together using a CAT5 patch cable. Set the downstream FLD2SA to DTE and the upstream FLD2SA to DCE.

15 10 TYPICAL SYSTEM OPERATION The configuration switches are set from the factory to accommodate most controller interface signals. However, in some cases, it may be necessary to adjust the polarity of the control signals. The FLD2SA has two modes of operation; Master Mode and Remote Mode. REMOTE MODE When the FLD2SA is set for the Remote Mode of operation, data coming downstream from the Master comes in Detector 1 and is sent to Emitter 2, RXD, and the RJ45 connector. Data coming upstream enters Detector 2 and is re-transmitted on Emitter 1. Transmit data from the local controller and RJ45 TXD Data is sent out Emitter 1. MASTER MODE In the Master Mode of operation, TXD data is transmitted out both of the Emitters and the RJ45 port. Data received by the two detectors and the RJ45 are ORed together and routed to the DB9 connector as RXD. Both fiber optic ports do not need to be used in this configuration. However if channel two is not being used it should be disabled to prevent any spurious interference with channel one. Directionality of the RJ45 pins 5 (RXD) and 6 (TXD) are dependent on the DCE/DTE switch.

16 11 Typical System connections: End Master: The master controller s FLD2SA should be set to disable Detector 2. Center Master: Notice that the end modem is also set to Master mode and its Detector 2 disabled. This is to completely isolate fiber port 2. Notice that both end modems are set to Master mode and their Detector 2 disabled.

17 12 The following is an example of a extended network. The Expansion port is used to link one FLD2SA to another FLD2 s expansion port.

18 13 This is an example of a Expanded network using co sited FLD2SAs. The Expansion port of the Master FLD2SA is connected to the M14 connector of an FLD2SA that is plugged into the same controller chassis. By using the C20 connector, the expanded FLD2SA can operate in Master mode and drive both fiber ports. This allows the master to drive four networks.

19 14 ADJUSTMENTS The FLD2SA will not need any adjusting. The only changes that may be required are the configuration switches. This will have to be determined based on the controller operation. A factory test procedure with full instructions on how to test and setup the modem will be provided on request.

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21 GDI COMMUNICATIONS, LLC GDI FLD2SA-1S/FLD2SA-2S MANUAL A00477 Rev. A 879 Deming Way Sparks, NV TELEPHONE: FAX: