DSP 9612 Flash Poll Modem User’s Guide Complements of ARC Electronics 800-926-0226 arc@arcelect.com www.arcelect.com 0049−0117−100 Rev.
Contents CHAPTER 1 INTRODUCTION........................................................ 5 FEATURES .............................................................................................. 6 APPLICATIONS ........................................................................................ 7 CHAPTER 2 INSTALLATION ......................................................... 9 UNPACKING YOUR HARDWARE .............................................................. 9 ADDITIONAL ITEMS YOU NEED ..............
Contents NOTES Page iv
Chapter 1 Introduction C ongratulations for purchasing the finest industrial-grade fastpoll modem available. The Telenetics DSP9612 (Flash Poll) modem is a 9600/4800/01800 bps modem designed for 4-wire, full-duplex or 2-wire, halfduplex operation over a voice-band leased line or private line. The modem is designed utilizing the latest digital-signal processing (DSP) technology to achieve high performance.
Introduction Features The DSP9612 modem is specifically designed for harsh environments found in utility substations and industrial facilities. Though functionally similar to commercial modems, the DSP9612 provides the following unique features that make it well suited for utility and industrial applications. Packaged in a rugged, compact enclosure for industrial applications. Leased-line interface protected with heavy-duty surge protection hardware (15KV).
Applications Applications The DSP9612 modem is designed for point-to-point and multipoint data communications. Figure 1-1 shows a typical multipoint configuration. Figure 1-1. Network of Multipoint Configuration There are a number of factors that can affect the network’s and modem’s operation and performance.
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Chapter 2 Installation T his chapter describes how to install the modem. Unpacking Your Hardware Your package should include: At least one of the following DSP9612 modems: − Model DSP9612FP for 85 to 265 VAC − Model DSP9612-LV for 10 to 53 VDC A leased-line cable A shielded DC power cable (model DSP9612-LV modem only) This User’s Guide If your package contents are damaged or missing, please contact your place of purchase immediately.
Installation A power supply that provides either: − 85 to 265 Volts AC, 50 to 60 Hz, single phase or 85 to 400 VDC (if you have the model DSP9612FP modem), or − 10 to 53 Volts DC (if you have the model DSP9612-LV modem) Hardware Overview Back View Figures 2-1 and 2-2 show the back view of the two DSP9612 modem models. Starting from the left side, these views show: A 4-wire/2-wire configuration block. See page 26. A female, 25-pin RS-232 connector, for connecting a standard DTE (RTU). See page 28.
Hardware Overview Figure 2-2. Back View of Model DSP9612-LV Modem Front View The Model DSP9612FP and Model 9612-LV modems have identical front panels. Figure 2-3 shows the front view of the modem. Starting from the left side, this view shows: A set of nine LEDs. See page 29. A loopback test switch. See page 30. Figure 2-3.
Installation Installation Summary The modem installation involves the following steps: 1. Finding a suitable location for the modem. See the section below. 2. Configuring the modem. See page 13. 3. Connecting to a transmission line. See page 25. 4. Connecting to a voltage source. See page 27. 5. Connecting a DTE device. See page 28. Finding a Suitable Location The location you select should provide easy access to the back panel communications interface(s) and front panel power interface.
Configuring the Modem Configuring the Modem You configure the modem using the three sets of DIP switches on the bottom of the modem. , IMPORTANT It is important to follow the three steps described below, in the order shown, to ensure that you configure your modem properly using the modem DIP switches: 1. Use DIP switch 3 (SW3) to configure the modem for your host DTE interface and network topology. Using SW3, you select the modem to operate in high-speed fast-poll or low-speed (FSK) mode. 2.
Installation SW1 DIP Switch Settings SW1 is an 8-position DIP switch. Table 2-1 shows the modem switch settings for DIP switch SW1. A description of the SW1 switch settings follows the table. SW1 settings apply for both high-speed fast-poll and lowspeed (FSK) modes Note: Table 2-1.
Configuring the Modem SW1-1 through SW1-4 − Transmit Level Switches SW1-1 through SW1-4 adjust the modem’s transmit level. Table 2-2 shows the transmit levels you can select using these switches. Table 2-2.
Installation SW1-5 − Receiver Dynamic Range SW1-5 ON = −10 to −43 dBm OFF = +3 to −30 dBm For a low receive signal level, set SW1-5 to ON (−43 dBm ). For short distances or to select a strong receive signal, set SW1-5 to OFF.
Configuring the Modem SW2 DIP Switch Settings SW2 is an 8-position DIP switch. Table 2-3 shows the modem switch settings for DIP switch SW2. A description of the SW2 switch settings follows the table. Table 2-3. Modem Switch Settings for DIP Switch SW2 Switches Switch Settings ON SW2-1: FSK Mode (page 18) OFF (Default) V.
Installation SW2-1 FSK Mode SW2-1 ON = ITU-T V.23 mode OFF = Bell 202 mode The modem has two FSK modes: Bell 202, which supports data rates from 0 to 1800 bps ITU-T V.23, which supports data rates from 0 to 1200 bps SW2-1 configures the modem for either of these FSK modes. Setting SW2-1 to ON selects ITU-T V.23 mode. In this mode, the modem complies with ITU-T (CCITT) recommendation V.
Configuring the Modem wire, half-duplex mode (SW3-7 ON), the modem squelches the receiver after RTS is turned off to prevent far-end echoes from causing data errors. The duration that the modem squelches the receiver is either: 8 milliseconds if the modem is configured for Bell 202 mode (SW2-1 OFF) 150 milliseconds if the modem is configured for ITU-T V.
Installation When the modem is configured for V.23 operation (SW2-1 ON), the RTS-CTS delay is fixed at 33 ms. SW2-6 FSK CD Delay (Bell 202 Mode Only) SW2-6 ON = 23ms OFF = 6ms SW2-6 selects the FSK CD delay and is valid when Bell 202 mode is active (SW2-1 OFF). Setting SW2-6 ON configures the modem to turn on CD 23 milliseconds after it detects a valid carrier signal. Setting this switch to OFF configures the modem to turn on CD 6 milliseconds after it detects a valid carrier signal.
Configuring the Modem SW3 DIP Switch Settings SW3 is a 10-position DIP switch. Table 2-5 shows the modem switch settings for DIP switch SW3. A description of the SW3 switch settings follows the table. Table 2-5.
Installation SW3-1 − Fast Poll Auto Rate/FSK SW3-1 ON = Low-Speed Mode (FSK) OFF = High-Speed Mode (Fast Poll) The modem has two operating modes: FSK mode, which supports data rates from 0 to 1800 bps. Fast-poll mode, which supports data rates of 4800 and 9600 bps. SW3-1, along with the Data Rate Selector (DRS) pin on the modem’s RS-232 connector, configures the modem for either FSK or fast-poll mode. Table 2-6 shows how SW3-1 and the DRS signal configure the modem for these operating modes.
Configuring the Modem SW3-2 − Data Rate (Fast-Poll Mode Only) SW3-2 ON = 4800 bps OFF = 9600 bps SW3-2 configures the modem speed. When the modem is in highspeed fast-poll mode (SW3-1 OFF), setting SW3-2 ON selects 4800 bps, while setting SW3-2 OFF selects 9600 bps. SW3-3 − Async Character (Fast-Poll Mode Only) SW3-3 ON = 11 bits OFF = 10 bits Switch SW3-3 selects whether the async character is 10 or 11 bits long.
Installation SW3-5 − Transmitter Termination SW3-5 ON = Switched by RTS OFF = 600 Ω SW3-5 is used for multi-point configuration networks. When multiple modems are connected on the same metallic circuit: The transmitter termination should be of high impedance if the modem is not transmitting. The transmitter is only terminated with 600 ohms when RTS is asserted. This configuration should be used for all slave modems to prevent the transmitting modem from being unnecessarily burdened.
Configuring the Modem SW3-8 − Carrier Control SW3-8 ON = Constant OFF = Switched SW3-8 selects either constant or switched carrier. Constant carrier allows DTEs, such as asynchronous dumb terminals or RTUs, to operate with modems, without the input RTS signal. When constant carrier mode is enabled (SW3-8 set to ON), the modem forces the transmit carrier active and the RTS-CTS delay is minimum (<0.5 ms.).
Installation Connecting to a Transmission Line The modem has a transmission line interface that can be configured for 2- or 4-wire, analog connection, where one pair is used to transmit data (Tx and Tx) and one pair is used to receive data (Rx and Rx). Table 2-7 shows the pin numbers and corresponding signals for the modem. Figure 2-4 shows the transmission line interface. Note: For communication to occur, the Rx line of one modem must connect to the Tx line of the other modem.
Connecting to a Voltage Source Figure 2-4. Transmission Line Interface Connecting to a Voltage Source The back panel of the modem provides the power interface. For convenience, the modems can be powered from the following power sources: Model DSP9612FP (AC version): 85 to 265 Volts AC, 50 to 60 Hz, single phase or 85 to 400 VDC Model DSP9612-LV (DC version): 10 to 53 Volts DC. The model DSP9612-LV comes with a shielded power cord for making this connection.
Installation , WARNING Before you connect a voltage source, observe the following power supply voltage guidelines. Otherwise, you will void your warranty if the wrong voltage is applied. Be sure the voltage source is within the permitted ranges shown above. Otherwise, your modem and any attached devices may be damaged. Customer-supplied cables must be suitable for the site environmental conditions. Screw terminals on the power interface accept 24 to 16 AWG.
LEDs LEDs The front panel of the modem provides the LEDs shown in Table 2-8. Table 2-8. Modem LEDs LED Color Description PWR Green Power Input RTS Yellow Request To Send CTS Yellow Clear To Send TD Yellow Transmit Data RD Yellow Receive Data CD Yellow Carrier Detect MR Yellow Modem Ready ALB Red* Analog Loopback DLB Red* Digital Loopback * When the modem is in remote loopback, both the ALB and DLB LEDs go ON.
Installation Loopback Control Switch The front panel of the modem has a push button for initiating the following loopback diagnostic tests: Local analog loopback started by pressing the button one time. Local digital loopback started by pressing the button two times. Remote digital loopback set the local modem’s RTS signal to low. Then press the remote modem’s diagnostics button three times and raise the local modem’s RTS signal to start the test.
Appendix A Troubleshooting I n the event you encounter a problem using your Telenetics modem, refer to the troubleshooting information in this appendix. , IMPORTANT If you encounter a problem with your modem, be sure the switches on the bottom of the modem are set to the appropriate positions. If a switch is halfway between an on and off setting, the modem will not operate properly. Problem Solving Table A-1 offers troubleshooting solutions for modem problems. Table A-1.
Troubleshooting Table A-1. Troubleshooting Suggestions If… Perform These Procedures… problem. The RTS, CTS, and TxD LEDs do not blink. The attached terminal or DTE may not be sending data to the modem. Verify that data is being transmitted. If data is being transmitted, make sure the RS232 cable is sound and securely connected to the modem and terminal or DTE.
Appendix B DIP Switch Summary Switches Switch Settings ON SW1-1 − 1-4: Transmit Level (page 15) OFF (Default) (see Table 2-2 on page 15) SW1-5: Receiver Dynamic Range (page 16) −10 to −43 dBm +3 to −30 dBm SW1-6: TX Cable Equalizer (page 16) Enabled Disabled SW1-7: RX Cable Equalizer (page 16) Enabled Disabled SW1-8: Anti-streaming (page 16) Active Inactive SW2-1: FSK Mode (page 18) V.
DIP Switch Summary Switches Switch Settings ON OFF (Default) SW3-1: Fast Poll/FSK (page 22) FSK Fast Poll Auto-Rate SW3-2: Data Rate (page 23) 4800 bps 9600 bps SW3-3: Async Character (page 23) 11 bits 10 bits SW3-4: Auto RTS (page 23) Enabled Disabled SW3-5: Transmitter Termination (page 24) Switched by RTS 600 Ω SW3-6: Reserved (Test Only) (page 24) Test Normal SW3-7: 2- or 4-wire (page 24) 2-wire, half-duplex 4-wire, full-duplex SW3-8: Carrier Control (page 25) Constant Switched
Appendix C Specifications General Specifications Data rate: 9600, 4800, or 0-1800 bps asynchronous Data format: 8 or 9 data bits with 1 or more stop bits DTE interface: EIA RS-232 or V.24 compatible Line conditions: TELCO Voice band 4- or 2-wire leased line, conditioned or unconditioned Private metallic circuits up to 9.5 miles (24 AWG) without cable equalizer. Up to 15.
Specifications Receiver dynamic range: 0 to –30 dBm or –10 to –43 dBm Operating temperature: -40°C to +85°C Power supply: Wide range switching power supply: • DSP9612FP (AC version): 85 to 265Volts AC, 50/60 Hz, single phase or 85 to 400 VDC • DSP9612-LV (DC version):10 to 53 Volts DC Surge protection: Leased line, up to 15KV Carrier control: Constant or switched, DIP switch selectable Carrier loss recovery: Train on Data Throughput delay: Less than 10 milliseconds for fast polling.
Interface Connector Pin Assignments Interface Connector Pin Assignments Leased Line Terminal Block Pin Assignments This Pin Number… Corresponds to This Signal… 1 Rx 2 Rx 3 Tx 4 Tx Back-to-Back Connection to a Second Modem Page 37
Specifications RS-232 (DTE) Interface Signal Name Modem Input/Output DB25 Pin Description Earth GND 1 Earth Ground TXD Input 2 Transmit Data RXD Output 3 Receive Data RTS Input 4 Request To Send CTS Output 5 Clear To Send DSR Output 6 Data Set Ready (Modem Ready) SG 7 Signal Ground DCD Output 8 Data Carrier Detected DRS Input 23 Data Rate Select Environmental Specifications Operating temperature: -40 to + 85o C Storage temperature: -40 to +125o C Operating hum
Compliances Compliances The modem is designed to meet the following agency requirements: EMI/RFI: FCC part 15 for Class A computing device Industry Canada.
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Appendix D Compliances This device complies with Part 15A of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15A of the FCC Rules.
Compliances Department of Canada Statement This Class A digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations. Cet appareil numerique de la classe A respecte toutes les exigences du Reglement sur le materiel brouilleur du Canada.
Appendix E Limited Product Warranty Telenetics warrants that the Product sold will be free from defects in material and workmanship and perform to Telenetics' applicable published specifications for a period of 18 months from the date of delivery to Customer or 12 months from placement into service, whichever occurs first. The liability of Telenetics hereunder shall be limited to replacing or repairing, at its option, any defective Products which are returned F.O.B.
Appendix F RMA Procedure Return Merchandise Authorization (RMA) Procedure Before returning any Telenetics product, an RMA number must be obtained. Before asking for an RMA number, ascertain that the product was purchased from Telenetics. If you bought the product from a Distributor or Systems Integrator, the product should be returned to that vendor. The most convenient method to obtain an RMA number for a product purchased from Telenetics is to send an email to support@telenetics.com.
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