Omega Speaker Systems RD8300 manual 24Vdc Isolated Output Option, Isolated Serial Interface Option

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Section 3 – Installation

3.924Vdc Isolated Output (Option)

The Isolated 24Vdc Output is an option that provides 24 Volts DC @ 100 milliamps to power external (current loop) sensors. The output is isolated to 1000 volts from all internal voltages and ground. The output is also protected against short circuit.

The output is polarized and is marked for positive (+) and negative (-). This option is field installable.

Figure 3-16

3.10 Isolated Serial Interface (Option)

A standard DB9 Female connector is required for the RS232 to connect to an IBM PC compatible computer using a null modem cable. The RS232 interface can support cable runs up to 50 feet [16 m]. The RS485 connection is via two wire (twisted pair) cable (a DB9 Female adapter connector is required) and can support cable runs up to 4000 feet [1300 m].

The RS232 and RS485 connections are mutually exclusive and are selected using pin 1 of the DB9 connector – see right.

The interface is isolated from internal circuitry to 500 volts. The RS485 requires a 120 ohm terminating resistor if it is the last unit on the drop. All Serial Interface connections are made through the DB9 female connector. An adapter connector is included that brings out the RS485 connections to a set of screw terminals and has the terminating resistor on the board. The RS485 connection is marked A and B for duplex 2 wire connection. A is + and B is -.

If the terminating resistor is required it is necessary to open the adapter shell and insert the jumper to enable the termination.

The connections to the DB9 female connector are as follows:

DB9 PIN

CONNECTION

DIRECTION

1

Mode Select (see below)

In

2

RxD Receive Data

In

3

TxD Transmit Data

Out

4

DTR Data Terminal Ready

Out

5

Common

Out

7

RTS Request To Send

Out

8

CTS Clear to Send

In

6

RS485 A+

Bidirectional

9

RS485 B-

Bidirectional

The mode select pin (pin 1) must be left unconnected for RS232 operation or must be grounded (to pin 5) for RS485 communication. Use the provided adapter for RS485 communication

Figure 3-17 Serial I/O

Fig 3-18 RS485 Adapter

Fig 3-19 RS485 120 Ohm Jumper

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09/11/2008 REV 0.99

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Contents User’s Guide Servicing North America Table of Contents Display Elements Environment and Location InstallationWiring Specifications and Procedures Timer/Totalizer Reset Special Events Turning the unit off Annotating TrendsBrowsing Historic Data Browsing AnnotationsAlarms Record SetupSystem Administrative Menu Digital Input/OutputTouch Screen Cleaning Instructions Calibration World Wide Web Web Based FTP Manager Ethernet ProtocolsUSB Connections Utility Programs 102Symbols Trademarks09/11/2008 REV Overview General DescriptionSystem Overview System Overview09/11/2008 REV Recorder Front Display AreaStatus Indicator Media DoorIR Comm Port StylusAnalog Inputs Power SupplyRecorder Rear Panel Input/Output Module Computer InterfaceConfiguration Files FilesExhibitor Software Data FilesActivity Files Miscellaneous FilesQuick Start Guide Keyboarding HelpActivity Lights SecurityRemote Access Passwords User LevelsEquipment Handling Environment and LocationInstallation Recorder Dimensions in Inches mmPanel Mounting Front Panel Cut OutPanel Front Gasket Rear View Panel InsertionPower Connections Wiring Specifications and ProceduresPower Requirements Signal Input Wiring Rear PanelResistance Temperature Detector RTD Inputs Analog InputsThermocouple Inputs Linear Inputs Potential Free Contacts FrequencyEthernet Relay Output, Contact InputMouse and Keyboard Connection USB ConnectionAudio Connection 18 RS485 Adapter 19 RS485 120 Ohm Jumper 24Vdc Isolated Output OptionIsolated Serial Interface Option Task Bar Display ElementsLive Display Area Utility Setup Menu Utility Setup Menu09/11/2008 REV Folder Mydata Data File Mydata.dat Bitmap Files Text Files Alarm, Event and Activity LogsRecord Session Configuration Manager Load ConfigurationSending Email E-mail WindowDisplay Brightness User LoginDisplay Utilities Timer/Totalizer Reset Record on AlarmSpecial Events Background ColorEmail on Alarm Event Record Setup Digital Input Setup Record ModeSystem Setup Alarm Master SetupAnnotating Trends Drawing on the ScreenBrowsing Historic Data Adding a Text MessageZoom and Compress Data 13.4 Zoom with point markersUsing the Cursor 13.8 Cursor ModeView Memos and Bitmaps 13.6 Memo View 13.7 Bitmap ViewUsing Browser Jump To Browsing AnnotationsInput Channels Master Channel SetupSetup display as shown right Channel Setup Channel SetupResistance Input Channel Type SetupLinear Input Industrial Square Root Extraction Thermocouples and RTDsCalculated Channel Setup Calculated Input09/11/2008 REV Gated Timer Conditional InputReset Point TotalizerFrequency/Pulse Count Frequency13 Pulse Count Setup Pulse CountRecorder Setup Display Builder Building the DisplayEditing 3 Display BuilderRotate List Digital Display Setup WidgetsDigital Displays Will show OFFDisplaying Min, Max or Average Values Bar Graph Setup Bar GraphsChannel Type Shows the current widget style for Channel. For information only09/11/2008 REV 09/11/2008 REV Trend Setup Trend Setup Window09/11/2008 REV Alarms RateAlarm Master Setup 1 Alarm Master SetupAlarm Setup Digital Input/Output Digital Output Setup 1 Digital Output SetupDigital Input Setup 09/11/2008 REV Record Setup Select ChannelsMedia and Filename Record RateWhat to Record Point type Max Min AverageTriggered Record Timed RecordSplit Files Media Alarm System Administrative Menu System Admin Menu09/11/2008 REV NTP Time Server Temperature CompensationSystem Setup Modbus Settings Mouse Pointer EnableConfig Auto Save Menu TimeoutUser Setup Password Management UserFile Explorer Network Settings 7 Web User AdminWeb User Manager 6 Network IP Address9 USB ActiveSync Password Smtp Email SettingsSet ActiveSync Password Registry Languages System ReFlash09/11/2008 REV Communication World Wide Web3 View Recorder Web Based FTP Manager 2 FTP File Manager Communication Ethernet Protocols OPC ServerModbus Data Registers Modbus ServerModbus Status Registers Register # USB Connections Utility Programs FTP Manager09/11/2008 REV 09/11/2008 REV 3 Remote Recorder Remote ControlRemote Display 5 Remote Manager Connected Remote Manager4 Remote Manager Calibration Cleaning InstructionsTouch Screen Calibrating Linear Voltage Inputs Set ChannelZero Cal Full CalCalibrating Frequency Store CalCalibrating the RTD Current Source Go to Table of Contents Resolution Color Virtual Chart SpeedPower Requirements Power Fail ProtectionType Range C Accuracy C Range F Accuracy F Safety DimensionsWeight Recording RatesAppendix B Digital Input Voltage Adjustment Input Board Fig B-4 Digital IO Module Jumpers 2 Channel shownWARRANTY/DISCLAIMER Temperature
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