Varec 4000 manual ATT Mark/Space Wiring, Typical Mark/Space Field Wiring

Page 19

4000	Installation

2.4.6ATT Mark/Space Wiring

For an ATT using the Mark/Space field communications option, the following additional wiring connections must be made. (Refer to Input Power Wiring in Section 6 to determine the minimum wire size required.). See Figure 2-6.

•Run two twisted pairs of 18 AWG wire (Mark/Space wires) into the ATT through the conduit entry along with the 48 VDC power wiring.

•Connect the Mark line to terminal 11, M/485-, and the Space line to terminal 12, S/485+, on the terminal block assembly.

8203 With 8210 expansion module

Field Junction Box

4 Conductor

Cable

18 AWG

Shielded

To Other

4-Wire

Transmitters

in Area 0

Ground shield at RTU8130 ONLY!

Do NOT ground shield at transmitter.

External

Power Supply

Varec

Model 4000

ATT

Details of RTU8130 with 8210 expansion module and ATT termination board wiring

Figure 2-6: Typical Mark/Space Field Wiring

9

Image 19

Contents Installation Operations Manual Page Copyright Disclaimer of Warranties Safety Precaution Definitions Safety Precautions Tank Gauge Transmitter Introduction Tank Gauge Transmitter Glossary Tank Gauge Transmitter Viii Introduction Using This ManualOperation ConfigurationConstruction Installation Part Number Gauge Adapter Kit Mounting the EquipmentConnecting Input Power WiringATT Wiring Wiring Preparation Terminal Block One TB1 Terminal Block Two TB2 Connecting Host CommunicationTypical EIA485 Wiring ATT EIA485 WiringTypical EIA485 System Wiring Typical Mark/Space Field Wiring ATT Mark/Space WiringInstallation Checkout Connecting the RTDConnecting the Handheld Terminal Wiring CompletionFunction Key Description ConfigurationConfiguration Parameters 1200 Hand Held TerminalTerminal Mode Configuration 1200 Hand Held Terminal Terminal Mode OperationMenu Operation Main Menu Description Main MenuSummary Menu Description Summary MenuConfiguration Menu Description Configuration MenuHost Menu Description Host MenuQuick Setup General Configuration Imperial Fractional 1900 Quick Setup DefaultsHost Configuration Imperial Decimal 1900 Quick Setup Defaults 3 0-20 Meter 1900 Quick Setup Defaults 4 0-30 Meter 1900 Quick Setup Defaults 8 0-30 Meters 1800 Series Transmitter Quick Setup Imperial Fractional 1800 Series Transmitter Quick SetupImperial Decimal 1800 Series Transmitter Quick Setup 7 0-20 Meters 1800 Series Transmitter Quick SetupImperial Modbus Quick Setup Defaults Metric Modbus Quick Setup Defaults Maintenance Maintenance and TroubleshootingBattery Replacement ATT Error Status Conditions TroubleshootingError Message Description ATT Status Conditions ATT Configuration Error CheckingStatus Condition Description Host Communication Loopback Tests Model 1200 Error MessagesEnvironmental SpecificationsSpecifications and Physical Characteristics Input PowerLevel Measurement Agency Acronym Requirement Safety Agency ApprovalsIntrinsic Safety Explosion ProofMajor System Assemblies and Components Assembly/Component Part NumberCommunications Order CodesOrder Codes CPU Board Theory of OperationHost Communications Interfaces Back-up BatteryStatus Inputs and Outputs Atti Communications PortTemperature Measurement Encoder Battery BackupHost Communication Function Number Mark/Space Host InterfaceNumber Exception Compatibility with Varec Tank Polling Unit Modbus Support over Mark/Space Host InterfaceTheory of Operation Model 4040 Display Unit ATT Family of ProductsDigital Inputs Relay SpecificationsModel 4050 Digital Input/Output Unit Digital OutputsIntroduction Modbus ImplementationImplementation Modbus Implementation Integer Registers Functions and Data FormatsTerm Definition Host Request Integer DataATT Response Character Data Packed Bit Data Coded DataFloating Point Data Floating-Point RegistersFloating-Point Data Two 16-bit Registers FormatOne 32-bit Register Format Exception Response Reason Status BitsStatus Bit Data Exception ResponsesLoopback Test Data Out of RangeHardware Implementation Register Number Type Description Integer Register MapRegister Number Sw Ver0-1 Noise Reject Type Status Bit Register Map Floating Point Register MapModbus Implementation 10.3 4000LJFMO Optional Interfaces10.1 4000TIFMO 10.2 4000GEFMO10.6 4000GMFMO 10.5 4000WBFMOAdv Hi Level GlossaryDband TSU Tank Gauge Transmitter 4000 Your official representative Your offical representative