The T8290 is a dedicated output power distribution unit for the ICS Triplex Trusted series under Rockwell Automation. It distributes 24 V DC to 120 V DC field positive power and 0 V reference circuits for Trusted sourcing output modules. Mounted on DIN rails above the I/O terminals of output modules, it is only applicable to standard digital sourcing output module applications.
If the project adopts analog output modules that obtain the 0 V reference via multi-functional field terminal assemblies, the equivalent series model T8297 with diode protection shall be used as a replacement. This unit is compatible with Trusted system version 3.6.1 and serves as an auxiliary power supply accessory for Safety Instrumented Systems (SIS). Installation and maintenance work must only be performed by personnel qualified to operate electronic safety systems.
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Model Code Decoding
Full breakdown of the T8290 model designation:
- T8: Unified prefix for all auxiliary accessories and I/O modules of the Trusted 8000 series
- 29: Classification code for power distribution auxiliary units
- 0: Standard version without built-in diode protection, differentiated from T8297 equipped with diode protection (the trailing digit 7 denotes the diode protection configuration)
Models without extra suffixes are standard hardware versions. The 8th revision of the official document is the current prevailing technical specification. Variants without coating or explosion-proof custom suffixes are standard general-purpose units.
Core Product Features
Power Output Specifications
Provides 24 V DC and 120 V DC field positive power outputs, separating power supply circuits and 0 V reference circuits. Field output circuits are routed via matched FTA field terminal assemblies.
Interface Configuration
Three groups of 6-pin connectors PL1/PL2/PL3 for connection to output modules; TB1 terminals for safety earthing and common 0 V connection; TB2/TB3/TB4 field terminal blocks; P1 and P2 dual power supply studs.
Mechanical Parameters
Height: 70 mm, Width: 90 mm, Depth including DIN rail: 50 mm, Net weight: 106 g. The lightweight structure reduces load on mounting rails.
Environmental Standards
Operating, storage and transportation humidity range: 10%–95% non-condensing. Non-operating temperature range: -25 °C to +70 °C. Full environmental standards refer to Document 552517.
Matching Cables
PD-TC100 and PD-TC200 dedicated connecting cables for signal interconnection between T8290 and output modules.
Safety Specifications
Subject to three operational restrictions including explosion-proof warning, RFI shielding and ESD protection. Maintenance shall only be carried out by certified personnel.
Application Industries
This unit is compatible with high-integrity Safety Instrumented Systems (SIS). Primary applicable sectors are listed below:Oil & gas extraction, refineries & chemical plants, thermal power / nuclear power plants, coal chemical industry, fine chemical manufacturing, pharmaceutical intermediate production, long-distance oil & gas pipelines, offshore platforms, high-temperature metallurgical smelting, and interlock systems for hazardous chemical storage.It is universally deployed for power distribution in safety control loops such as ESD emergency shutdown, combustion safety interlocks and unit protection.
Product Advantages
- Powerful power expansion capacity: A single unit can drive 3 channels of Trusted sourcing output modules simultaneously and operate stably as long as the total load capacity is within limits.
- Dual stud power terminals support two wiring modes: single-feed and dual redundant feed. Blocking diodes can be deployed for power isolation under dual-feed configurations.
- Standardized BLZ two-part connectors output 0 V reference signals for modules. The terminal layout matches dedicated cables, delivering neat wiring and convenient troubleshooting.
- Compatible with two common industrial DIN rails (TS32 and TS35), offering great adaptability for cabinet installation with minimal space occupation.
- Wide temperature and humidity tolerance: Non-operating temperature ranges from -25℃ to 70℃; humidity for storage, transit and operation covers 10%–95% non-condensing, suitable for high-risk industrial working conditions.
- ESD protection structure: Electrostatic-sensitive components on the board are isolated to reduce the risk of electrostatic breakdown under standard operating procedures.
- Explosion-proof compliant design: Clear live plug/unplug operation specifications for hazardous areas, meeting installation requirements of explosion-proof cabinets used in chemical and oil & gas industries.
Matching Supporting Products
- Compatible Output I/O ModulesT8451 (24 V DC Digital Sourcing Output Module), T8471 (120 V DC Digital Sourcing Output Module)
- Matching Connection CablesPD-TC100, PD-TC200 (Special inter-module cables)
- Installation AccessoriesTS32 / TS35 DIN rails, BLZ two-part connector terminals
- System Terminal AssembliesStandard FTA field terminals (Not compatible with VFTA multi-function terminals; T8297 is required for VFTA applications)
FAQ
Q1: What is the maximum number of output modules that can be driven simultaneously by T8290?A1: The hardware limit is 3 Trusted sourcing output modules, provided the total load current of the three modules does not exceed the rated capacity of the unit.
Q2: Can T8290 be used for projects with analog output modules?A2: No. T8297 with diode protection must be adopted for analog output modules and VFTA terminal applications. Without anti-reverse diodes, T8290 will cause circuit faults.
Q3: Does T8290 support dual redundant 24 V DC power supply?A3: The dual studs support dual-feed wiring, yet there are no internal isolation diodes inside T8290. External blocking diodes must be installed between the two power sources to avoid reverse current cross-feed.
Q4: Are T8290 and T8297 interchangeable in appearance and mounting dimensions?A4: They share identical mounting dimensions and DIN rail clip structures, enabling direct interchange at cabinet slots. Only internal circuitry and terminal matching logic differ.
Q5: Is live plugging and unplugging of T8290 terminals allowed in hazardous explosion-proof areas?A5: Live connection changes are strictly prohibited. Official documents clearly mark explosion hazard warnings. Terminals can only be disassembled or reconnected after the equipment is fully powered down and no flammable gas exists in the area.
Q6: Are PD-TC series connecting cables included with T8290 upon purchase?A6: PD-TC100 and PD-TC200 cables are separate spare parts requiring independent orders. No connecting cables are supplied with the T8290 unit itself.
Q7: Which terminals should be inspected if unstable 0 V reference occurs during operation?A7: Prioritize checking the TB1 earthing terminal and BLZ two-part connectors PL1/PL2/PL3 for loose terminals, oxidation and poor wiring contact.
Q8: What temperature and humidity requirements apply to T8290 storage environments?A8: Storage humidity ranges from 10% to 95% non-condensing, storage temperature between -25℃ and +70℃. Long-term storage under condensation or direct high-temperature sunlight exposure is forbidden.
Recommended Models of the Same Series
T8297 Output Power Distribution Unit with Diode ProtectionT8451 24 V DC Digital Sourcing Output ModuleT8471 120 V DC Digital Sourcing Output ModuleT8431 Analog Input TMR ModuleT8111C Trusted Processor ModuleT8850 40-Channel Digital / Analog Output FTA Terminal BoardT8312 Expansion Enclosure Adaptor UnitT8403CX 40-Channel Digital Input TMR ModuleT8842 General Multi-Function VFTA Terminal BoardT8480C Analog Output TMR ModuleT8151C Communication Interface ModuleT8870 32-Channel 120 V DC Digital Output FTAT8423 120 V DC Digital Input ModuleT8270 System Power Distribution Accessory
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