The TRICONEX 8311 is a high-density 24VDC rack power module for the Tricon safety control system, designed specifically for high-power, fully equipped I/O racks, using a dual redundant architecture to meet SIL3 safety levels.
1、 Core positioning and functions
High density and high power: A single module outputs 24VDC/15A (175W), which can meet all the power supply needs of a fully equipped Tricon rack.
Dual redundancy architecture: forms 1+1 redundancy with another 8311, and a single point of failure does not affect system operation; Support hot plugging and online maintenance.
Input specification: 24VDC input (22-31VDC), no AC input version.
Protection and diagnosis: built-in overvoltage, overcurrent, and short-circuit protection; Equipped with LED status indication and fault alarm contact (NO/NC), it can be connected to system monitoring.
Safety certification: Compliant with IEC 61508 SIL3, T Ü V certification, used for critical safety scenarios such as ESD, FGS, SIS, etc.
2、 Key Technical Parameters (2026)
Parameter specifications
Input voltage 24 VDC (22-31 VDC)
Output voltage 24 VDC stabilized
Output current of 15 A (peak), continuously above 12 A
Rated power 175 W
Fuse 15A, delay type
Holding time ≥ 2.8 ms (power-off holding)
Working temperature -40 ° C to 70 ° C
Size approximately 43 mm x 178 mm x 406 mm (standard Tricon module)
Weight approximately 2.7 kg
Safety level SIL3 (IEC 61508)
3、 Supply and shutdown status (March 2026)
Original factory status: Mature classic model, not officially discontinued, but no longer promoted; Brand new original equipment requires quota, with a futures cycle of 6-10 weeks.
Market inventory: Adequate second-hand/refurbished/spare parts inventory, stable prices, suitable for stock system replacement.
Alternative direction: New projects prioritize the use of Tricon CX platform supporting power supply; The existing system can be directly compatible with replacement.
4、 Market price reference for March 2026 (including tax)
table
Source Type Reference Price Remarks
Brand new original (1-year factory warranty) 28000-35000 yuan/unit, significant impact on channel, batch, and delivery time
Used/Tested Qualified (1-Year Third Party Warranty) 12000-18000 yuan/unit requires verification of serial number, no burn marks, and comes with a test report
5、 Comparison with power supplies of the same series (selection reference)
table
Model input/output positioning
8311 24 VDC 24 VDC/15A high-density, high-power rack power supply
8310 120 VAC/VDC 24 VDC/5A standard power, universal type
8312 230 VAC 24 VDC/15A 230V input, high power
8305A 120 VAC/DC 24 VDC/4A basic type, low power
6、 Application and configuration suggestions
Applicable scenarios: Safety systems that require SIL3 level, fully equipped I/O, and high-power redundancy, such as petrochemical, coal chemical, offshore platforms, and nuclear power.
Configuration principle: Each rack is equipped with 2 8311s for 1+1 redundancy; Try to use the same batch and firmware version as much as possible.
Maintenance points: Regularly monitor power health through TriStation; Hot plugging should be strictly operated according to the manual to prevent static electricity.
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