TrustedTM PD-T8432 TrustedTM Dual 24Vdc Analogue Input Module - 60 Channel Introduction TM The Trusted Dual 24V dc Analogue Input module interfaces to 60 field input devices. Comprehensive diagnostic tests are performed on each input channel. Fault tolerance is achieved through the ‘OneOut-Of-Two D’ (1-oo-2D) voting architecture within the module for each of the 60 input channels. Using the built-in line-monitoring feature, the module can detect open and shorted field cables.
TrustedTM Module T8432 Issue Record Issue Number Date Revised by Technical Check Authorised by Modification 9 June 05 J W Clark G Creech R Cockman Reformat Sect 3.2.
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TrustedTM Module T8432 Table of Contents 1. Description ...................................................................................................................................8 1.1. Field Termination Unit (FTU) .......................................................................................................9 1.2. Field Interface Unit (FIU) .............................................................................................................9 1.3. Host Interface Unit (HIU) ..
TrustedTM Module T8432 5.7. Input Channel Calibration Check ...............................................................................................28 5.8. Transfer between Active and Standby Modules ........................................................................29 6. Specifications.............................................................................................................................31 Figures Figure 1 Module Architecture...........................................
TrustedTM Module T8432 Notice The content of this document is confidential to ICS Triplex Technology Ltd. companies and their partners. It may not be given away, lent, resold, hired out or made available to a third party for any purpose without the written consent of ICS Triplex Technology Ltd. This document contains proprietary information that is protected by copyright. All rights are reserved.
TrustedTM Module T8432 Revision and Updating Policy All new and revised information pertinent to this document shall be issued by ICS Triplex Technology Ltd. and shall be incorporated into this document in accordance with the enclosed instructions. The change is to be recorded on the Amendment Record of this document.
TrustedTM Module T8432 1. Description TM The Dual 24V dc Analogue Input module is a member of the Trusted range of Input/Output (I/O) TM modules. All Trusted I/O modules share common functionality and form. At the most general level, all I/O modules interface to the Inter-Module Bus (IMB) which provides power and allows TM communication with the Trusted TMR Processor. In addition, all modules have a field interface that is used to connect to module specific signals in the field.
TrustedTM Module T8432 TM Figure 2 shows a simplified functional block diagram of the Trusted module. Dual 24V dc Analogue Input Figure 2 Functional Block Diagram 1.1. Field Termination Unit (FTU) The Field Termination Unit (FTU) is the I/O module assembly that connects all three FIUs to a field connector. The FTU primarily contains passive components necessary for front-end signal TM conditioning.
TrustedTM Module T8432 1.3. Host Interface Unit (HIU) The HIU is the point of access to the Inter-Module Bus (IMB) for the module. It also provides power distribution and local programmable processing power. The HIU is the only section of the I/O module TM to directly connect to the IMB backplane. The HIU is common to most Trusted I/O module types and has type dependent and product range common functions. Each HIU contains three independent slices, commonly referred to as A, B, and C.
TrustedTM Module T8432 1.5. Line Monitoring Thresholds The module determines the contact state and line fault status by comparing the input voltage level to four user programmed thresholds and two fixed (minimum and maximum) thresholds. Hysteresis is provided on the thresholds by up-scale and downscale values, corresponding to the thresholds for increasing and decreasing values respectively. Typical voltage threshold values Tmax Input Channel State Line Fault Status Over-range 6 1 High-High 5 6.
TrustedTM Module T8432 1.6. Housekeeping The input module automatically performs local measurements of several on-board signals that can be used for detailed troubleshooting and verification of module operating characteristics. Measurements are made within each slice’s HIU and FIU. 1.7. Fault Detection and Testing From the IMB to the field connector, the input module contains extensive fault detection and integrity testing. As an input device, all testing is performed in a non-interfering mode.
TrustedTM Module T8432 2. Installation 2.1. Module Insertion/Removal CAUTION: The module contains static sensitive parts. static handling precautions must be observed. Specifically ensure that exposed connector pins ARE NOT TOUCHED. Under no circumstances should the module housing BE REMOVED. Before installation, visually inspect the module for damage. Ensure that the module housing appears undamaged and inspect the I/O connector at the back of the module for bent pins.
TrustedTM Module T8432 2.3.
TrustedTM Module T8432 TrustedTM Module Polarisation/Keying. 2.4. TM All Trusted Modules have been Keyed to prevent insertion into the wrong position within a chassis. The polarisation comprises two parts. The module and the associated field cable. Each module type has been keyed during manufacture.
TrustedTM Module T8432 3. Application 3.1. Module Configuration There is no configuration required to the physical input module. All configurable characteristics of the module are performed using tools on the EWS and become part of the application or system.ini file that is loaded into the TMR Processor. The TMR Processor automatically configures the input module after applications are downloaded and during Active/Standby changeover.
TrustedTM Module T8432 OEM Parameter Description Notes TICS_CHASSIS The number of the TM Trusted Chassis where the primary I/O module is installed The Trusted Controller Chassis is 1, and TM Trusted Expander Chassis are 2 to 15 TICS_SLOT The slot number in the chassis where the primary I/O module is installed The I/O module slots in the Trusted Controller chassis are numbered from 1 to 8.
TrustedTM Module T8432 The least significant 3-bits indicate the threshold band within which the input lies. Value Description 7 Unknown 6 Over-range 5 High-High 4 High 3 Normal 2 Low 1 line fault 0 Underrange Table 7 Rack 2: STATE bit descriptions The input channel has a value 7 (Unknown) when: 1. The input channel cannot be correctly measured by two slices of the input module. 2. The TMR Processor detects a channel discrepancy between the slices of the input module. 3.
TrustedTM Module T8432 3.2.3. Rack 3: AI The AI board returns the engineering units for the associated field input. Channel Description 1 Field input channel 1 voltage 2 Field input channel 2 voltage 60 Field input channel 60 voltage Table 8 Rack 3: Channel Field Voltage The voltage is the median value taken from the triplicated module. Field input current is converted to voltage using a 250R resistor on a standard field termination assembly (FTA).
TrustedTM Module T8432 3.2.4. Rack 4: THRSHOUT This board allows the current thresholds for an analogue input channel to be read or written by the application. The application can write new thresholds in the THRSHOUT board for a particular channel, and it can read the current thresholds from the THRSHIN board, under control of a channel in the THRSHOUT board. Channel Description 1 Write the threshold data for a particular input channel on channels 3 to 11 to the module.
TrustedTM Module T8432 3.2.5. Rack 5: LINE_FLT Channel Description 1 Field input channel 1 line fault 2 Field input channel 2 line fault 60 Field input channel 60 line fault Table 11 Rack 5: LINE_FLT The line fault input state is reported as true (logic ‘1’) for a line fault condition (under-range, or overrange condition). The logic state is the majority voted value. 3.2.6.
TrustedTM Module T8432 3.2.7.
TrustedTM Module T8432 Each input within the housekeeping rack is reported as an integer. In general, the application engineer will not normally require these inputs. They are provided to aid fault finding and diagnosis and may be used for reporting and display purposes. If a slice is Fatal, then all reported housekeeping inputs are set to zero. 3.2.8.
TrustedTM Module T8432 Bit Number 7 6 5 4 Standby Module Ejector open FCR C Healthy 3 2 1 0 FCR B Healthy FCR A Healthy Active Module FCR B Healthy FCR A Healthy Ejectors open FCR C Healthy Table 16 Rack 8: FCR bit descriptions The ‘Primary Module is active’ channel is set to non-zero if the primary module is the current active module, i.e. the active module is in the chassis and slot numbers defined within the OEM parameters.
TrustedTM Module T8432 4. OPERATION 4.1. Front Panel Located at the top and bottom of each module is an ejector lever that is used to remove the module from the chassis. Limit switches detect the open/closed position of the ejector levers. The ejector levers are normally latched closed when the module is firmly seated into the Controller or Expander Chassis.
TrustedTM Module T8432 4.2. Module Status LEDs There are six module status LEDs on the module front panel; three Healthy, one Active, one Standby, and one Educated. The Healthy indicators are controlled directly by each module slice. The Active, Standby, and Educated indicators are controlled by the FPU. The FPU receives data from each of the module slices. The FPU performs a 2-oo-3 vote on each data bit from the slices and sets the indicators accordingly.
TrustedTM Module T8432 5. Fault Finding and Maintenance 5.1. Fault Reporting Input module faults are reported to the user through visual indicators (LEDs) on the front panel of the module. Faults are also reported via status variables which may be automatically monitored in the application programs, and external system communications interfaces. There are generally two types of faults that must be remedied by the user; external wiring and module faults.
TrustedTM Module T8432 5.4. Companion Slot TM For a Companion Slot configuration, two adjacent slots in a Trusted Chassis are configured for the same input module function. One slot is the primary slot and the other a unique secondary (or spare) TM slot. The two slots are joined at the rear of the Trusted Chassis with a double-wide I/O Interface Cable that connects both slots to common field wiring terminations.
TrustedTM Module T8432 • 12 mA signal should give a 50% of full scale reading • 20 mA signal should give a 100% of full scale reading • 5.8. Transfer between Active and Standby Modules The TMR Processor is responsible for managing a pair of I/O modules through an active/standby changeover.
TrustedTM Module T8432 active module and pressing the push-button reset on the TMR Processor. changeover to proceed even if the new active module is not fault free.
TrustedTM Module T8432 6. Specifications System Supply Voltage Range 20 to 32V dc Number of Inputs 60 Channels User Defined Thresholds 5-off Operating Current Range 0-22mA Operating Voltage Range 0-6 V dc Sample Update Time 0.5 ms Resolution 3.9uA (1/256mA) Safety Accuracy +/- 1% of full scale (default threshold above which 0x70nn series slice discrepancy faults are raised) Calibration Accuracy 0.
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