TrustedTM PD-T8423 TrustedTM TMR 35 – 120 Vdc Digital Input Module – 40 Channel Introduction TM The Trusted TMR 120V dc Digital Input module interfaces to 40 field input devices. Fault tolerance is achieved through a Triple Modular Redundant (TMR) architecture within the module for each of the 40 input channels. Each field input is triplicated and the input voltage is measured using a sigma-delta input circuit.
TrustedTM Module T8423 Issue Record Issue Number Date 1 Revised by Technical Check Authorised by Modification J Parry 2 2/4/01 P Barnett 3 22/5/01 P Barnett 4 23/5/01 P Barnett 5 31/8/01 P Barnett 6 21/1/02 P Barnett 7 21/1/03 P Barnett 8 24/7/03 P Barnett 9 Jan 05 J Bourn G Creech R Cockman 10 May 05 J W Clark G Creech R Cockman 11 June 05 J W Clark Reformat Table 11 Rack 3 Bits now 0-6 & 7-14. O/P Smart slot cable ref removed.
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TrustedTM Module T8423 Table of Contents 1. Description......................................................................................................................................8 1.1. Field Termination Unit (FTU)..........................................................................................................9 1.2. Field Interface Unit (FIU) ..............................................................................................................10 1.3.
TrustedTM Module T8423 5.6. Cold Start......................................................................................................................................30 5.7. Transfer between Active and Standby Modules ...........................................................................31 6. Specifications ...............................................................................................................................32 Figures Figure 1 Module Architecture....................
TrustedTM Module T8423 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 T8423 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 T8423 1. Description TM TM The Trusted TMR 35-120Vdc Digital Input module is a member of the Trusted range of TM Input/Output (I/O) 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 TM allows 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 T8423 TM Figure 2 shows a simplified functional block diagram of the Trusted 120Vdc Digital input module. Figure 2 Functional Block Diagram 1.1. Field Termination Unit (FTU) The Field Termination Unit (FTU) is the section of the I/O module that connects all three FIUs to a single field interface. The FTU primarily contains passive components necessary for front-end signal TM conditioning, field signal over-voltage protection, and EMI/RFI filtering.
TrustedTM Module T8423 1.2. Field Interface Unit (FIU) The Field Interface Unit (FIU) is the section of the module that contains the specific circuits necessary to interface to the particular types of field I/O signals. Each module has three FIUs, one per slice. For the TMR 120V dc Digital Input module, the FIU contains an individual analogue to digital (A/D) converter for each of the 40 field inputs. The FIU receives isolated power from the HIU for logic.
TrustedTM Module T8423 1.4. Front Panel Unit (FPU) The Front Panel Unit (FPU) comprises a Front Panel Termination Unit (FPTU) and a Front Panel Display Unit (FPDU). The overall FPU contains the necessary connectors, switches, logic, and LED TM indicators for the front panel. For every type of Trusted I/O module, the FPU contains the Slice Healthy, Active/Standby and Educated indicators (LEDs), and the module removal switches.
TrustedTM Module T8423 Typical voltage threshold values Tmax Input Channel State DI Status Line Fault Status Over-range 6 0 1 Short Circuit 5 4 or 51 0/1 0/1 4 ‘1’ 0 3 or 4 0/1 0/1 3 0 1 160.0 T8 111.0 T7 110.0 Contact Closed T6 91.0 T5 90.0 Contact Indeterminate T4 41.0 T3 40.0 2 or 3 Contact Open T2 11.0 T1 10.0 2 Open Circuit Tmin 0 1 or 2 0/1 1 1 -10.
TrustedTM Module T8423 Typical voltage threshold values Tmax Input Channel State DI Status Line Fault Status Over-range 6 0 1 Short Circuit 5 4 or 52 0/1 0/1 4 ‘1’ 0 3 or 4 0/1 0/1 3 0 1 160.0 T8 44.4 T7 44.0 Contact Closed T6 36.4 T5 36.0 Contact Indeterminate T4 16.4 T3 16.0 2 or 3 Contact Open T2 4.4 T1 4.0 Tmin 0 2 1 or 2 0/1 Open Circuit 1 1 Under-range 0 -10.
TrustedTM Module T8423 When a module is inserted into the standby slot in a line-monitored application, then the field terminations for all the input channels are paralleled, resulting in a drop in the input voltages for the active module. The module biases each input channel by means of a 60kM (typical for 120V dc digital inputs) termination resistor to the 0V reference of the module input circuitry.
TrustedTM Module T8423 1.8. Sequence of Events Characteristics The input module automatically measures the field-input voltage, compares the value to the configurable thresholds, and determines the state of the field input. An event occurs when the input transitions from one state to another. When an input changes state, the on-board real-time clock value is recorded. When the TMR Processor next reads data from the input module, the input state and realtime clock values are retrieved.
TrustedTM Module T8423 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 T8423 2.3.
TrustedTM Module T8423 2.4. TrustedTM Module Polarisation/Keying. 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 T8423 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 T8423 OEM Parameter Description Notes TM TM TICS_CHASSIS The number of the 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 T8423 Value Description 7 Unknown 6 Over-range 5 Short circuit 4 Closed contact 3 Indeterminate 2 Open contact 1 Open circuit 0 Under-range Table 8 Rack 2: STATE Output bit descriptions The input channel has a value 7 (Unknown) when: 1. The input channel cannot be correctly measured by two or more slices of the TMR input module. 2. The TMR Processor detects a 2-oo-3 channel discrepancy between the three slices of the TMR input module. 3.
TrustedTM Module T8423 The IEC1131 TOOLSET conversion tables may be used to convert the input value to engineering units, in this case voltage. The full-scale range for this number format is decimal ±256, corresponding to physical range –32768 to +32767. Other units may be chosen depending on the numeric resolution and span of the desired result. When the TMR Processor detects a 2oo3 channel fault or discrepancy, or if the input module is simulated, the input voltage numeric value is reported as –2048. 3.
TrustedTM Module T8423 3.2.7.
TrustedTM Module T8423 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 are often 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 T8423 Bit 7 6 5 4 3 Standby Module Ejector open FCR C Healthy 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 T8423 4. Operation 4.1. Front Panel Status LEDs on the front of the module provide visual indications of the module’s operational status and field input status. Each LED is a tri-colour LED of which for normal operation, only two colours are used; red and green. 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.
TrustedTM Module T8423 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 T8423 The configurable voltage thresholds and LED modes allow users to customise the input measurement and status indications to suit individual application requirements. Without customisation, the default indicator modes are suitable for digital inputs without line monitoring as described below: Indicator State Description Off Open field switch (contact) or open circuit or indeterminate between open and closed (states 1,2,3).
TrustedTM Module T8423 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 T8423 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 T8423 5.7. Transfer between Active and Standby Modules The TMR Processor is responsible for managing a pair of I/O modules through an active/standby changeover. The following rules apply to active/standby changeovers, though the TMR Processor and not the I/O module enforce them: • The user must define the primary, and optionally the secondary, I/O module location for each I/O module pair.
TrustedTM Module T8423 6. Specifications System Supply Voltage Range 20 to 32 Vdc Voltage Range (Field Supply) 35 to 140 Vdc Number of Inputs 40 Channels Input Voltage Measurement Range ±120V dc Maximum Withstanding ±160V dc Input voltage monitor absolute accuracy 0.5V dc Full Scale Sample Update Time 0.
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