Emerson Process Management 9110-00A, Series 9110 Guard Input, Output Rate of Change, Guard Logic

Page 29

3.5 GUARD INPUT

The guard input (TB1-5 & TB1-6) is used to Enable or Inhibit the command input. This feature provides assurance that the command input will read its signal only during a security period selected by the user. The guard input can be used with either Analog or Raise/Lower (R/L) models.

3.5.1 Guard Logic

The guard logic can be set for logical operation so that a TRUE-state signal “enables” the Command input, while a FALSE-state signal “inhibits” it. The Guard input logic can also be set internally so that it is kept ON continuously; in this mode the Command input will be “enabled” at all times. Switch SW2-6 is used to set the guard mode as follows:

SW2-6

Guard Mode

Open

Active (Guard signal must be in TRUE state to accept input)

Close

Inactive (All inputs accepted)

3.5.2 Static or Dynamic Guard Input

The Guard input may be set to operate in a static or dynamic mode. The static mode, which can be used with either Analog or Raise/Lower command signals, allows the output to respond to a Command signal only when the Guard terminal is in a TRUE state.

The dynamic mode, which is only available with Raise/Lower models, responds to the simultaneous transition of two pulse-type signals. Consequently, the output will only change when a guard pulse and a command pulse (either a raise or lower) occur at the same moment. Furthermore, both pulses must remain TRUE until the actuator output change is complete. If either a guard or command pulse is not completed before the specified time, the pressure output will be held at its last value until a new change occurs. This arrangement can be used to obtain greater system security from extraneous signals and signal failure. This feature should not be used with Analog models.

The selection of static or dynamic mode is obtained via switch SW2-1 as follows:

SW2-1

Guard Status

Close

Dynamic (R/L type only)

Open

Static (AI or R/L types) *

*The "Open" position must always be used when "Fail Zero" mode is selected (see Section 3.7 - "Analog Failure Modes").

3.6OUTPUT RATE OF CHANGE

The Regulator includes provisions for changing the time required by the stepper motor to sweep the entire pressure output range. This feature, which is available on both Analog and Raise/Lower models, is implemented by setting switches SW2-2 through SW2-5 as noted in Table 3-3.

CI-9110

3-5

Board Setup

Page 28 Page 30
Image 29
Page 28 Page 30
Contents Remote Set Regulator Model 9110-00A IMPORTANT! Read Instructions Before Starting Warranty Phone MailBristol Inc Bristol Inc. Repair Authorization Form off-line completion Training 860 860 945-2213 FAX Telephone Support Technical QuestionsVisit our Site on the World Wide Web Training Courses Model 9110-00A Remote SET Regulator Supplemental Instructions Analog Regulator Model Product DescriptionTheory of Operation Remote Set Regulator Block Diagram of Analog Type Regulator Current Output Guard InputBlock Diagram of Raise/Lower Type Regulator Model Number Breakdown Data PlateRaise/Lower Regulator Model = Pneumatic Output = Mounting Arrangement Page Mounting GeneralTwo-Inch Pipe Mounting In-Line MountingGeneral Piping Pressure ConnectionsMoisture in Lines Regulator AssemblyLine Size Internal AccessVenting Body and CoverElectrical Conduit Port Safety NotePage Slide Switches with on Designation Using Option SwitchesCradle Switches with Open Designation Regulator Assembly Switch SW1 & SW2 Functions & Settings Switch FunctionsAnalog Input Models RAISE/LOWER Input ModelsIncremental Signal Continuous SignalInput Filter Switch SW1 1-5, Pulse IncrementsOutput Rate of Change Guard InputStatic or Dynamic Guard Input Guard LogicAnalog Failure Modes Fail Hold & Fail Zero Switch SW2 2-5, Output Rate Of ChangeFAIL-ZERO Mode Page Field Wiring Terminal Identification For Raise/Lower Models Terminal Identification For Analog Input ModelsAnalog Voltage Input with Guard RAISE/LOWER Inputs with Guard Analog Current Input 4-20 mA with GuardRaise/Lower & Guard Inputs from Relay Contacts Current Output to FSK Bi-State Transmitter DC PowerInitial Checks Operating NotesField Wiring CI-9110 Service Troubleshooting Hints Test Setup Setting Output LimitsProcedure General PrinciplesCalibration Precaution Calibration Test SetupPreliminary Calibration Check Analog Test SetupFeedback Zero & Span Detailed Calibration for Analog ModelCurrent Output Span & Load Pressure Output CheckDetailed Calibration for RAISE/LOWER Model Raise/Lower Test SetupCPU Board & Termination Board Reference Table PCB Reference DrawingsAssembly, Analog Type CPU Board with Current Output Assembly, Raise/Lower Type CPU Board with Current Output RAISE/LOWER Input Model Analog Input ModelAccuracy Analog Models Analog OutputAccuracy RAISE/LOWER Models Stepper Drive MechanismInstrument Enclosure Pressure Regulator AssemblyEnvironmental Range Factory Calibrated withHumidity 10 to 95% over -20to +130 F -29to +55 Range Parts Referenced in Figure Model 9110 Main PartsRemote Set Regulator Actuator Unit Remote Set Regulator Actuator Unit Mounting Parts Remote SET Regulator Basic Parts Remote Set Regulator Assembly Basic PartsGuidelines for System Grounding Basic Ground Rod Installation General Recommendations Noise and Signal ErrorsGrounding of Equipment Housing Transients and Interference Grounding of Transmitter Types of Earth Grounds AC Power Grounding System Rocky Soil Dry SoilSandy Soil Following installation procedures apply Several DPCs Mounted in Metal Cabinet with Power SupplyGrounding for DPCs and Power Supplies Single Metal Cabinet Multiple DPC Cabinets Powered by Single Power Supply Elements of a Facility Ground System References Multiple Clusters of DPC Cabinets Powered by Local SuppliesPage Remote Set Regulator Model 9110-00A
Top Page Image Contents