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Help CenterBently 3500/34 TMR Relay Module IN STOCK
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Shenzhen Changxin automation equipment Co., Ltd
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Contact Name: Anne
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I. Product Description
3500/34 belongs to the BTL 3500 series TSI turbine safety monitoring system TMR triple-module redundant safety relay output module. The hardware part number is 125696-01. It is specially designed for the safety trip interlock of the unit. It adopts a three-out-of-two voting redundant architecture and can be associated with dangerous alarm signals such as vibration, axial displacement, differential expansion, and overspeed. It outputs passive relay contacts to drive the ETS trip circuit of the unit, eliminating the possibility of false tripping or refusal to trip due to a single point of hardware failure, meeting the safety SIL level specifications of power plants, and supporting online hot plugging of racks. It is a key safety protection spare part for large steam turbines and gas turbines.
Key Technical Parameters
Model: 3500/34, Hardware Part Number: 125696-01
Channel Configuration: 3 independent TMR triple redundant relay channels, each channel has 3 sets of independent relays, using 2/3 voting logic
Contact Specifications: Each channel has DPDT double-pole double-throw passive dry contacts
Contact Rated Capacity: Resistive load AC250V 5A / DC125V 5A
Protection Action Response Time: ≤15ms
Power Supply Method: Powered by the DC power supply of the 3500 system backplane, the overall power consumption is approximately 4W
Operating Environment Temperature: -30℃ to +65℃; Storage Temperature: -40℃ to +85℃
Operating Relative Humidity: 5% to 95% RH, no condensation
Protection Grade: IP20, can only be installed in the 3500 rack cabinet
Installation Specifications: Half-height 19-inch standard slot, supports hot-swappable replacement without downtime
Panel Status: OK operation, fault, 3-channel relay action LED indicator lights
Maximum configuration of 4 3500/34 modules per 3500 rack
Safety Certification: Compliant with ISA S84.01 safety standard, CE, UL industrial electromagnetic compatibility certification
Overall Weight: Approximately 0.82kg
Product Performance
Triple redundant TMR three-out-of-two voting architecture: A single relay failure or drive circuit failure will not trigger a false trip. Only when two or more are triggered simultaneously will the protection instruction be output, significantly improving the reliability of the unit's trip circuit and avoiding unplanned shutdown risks.
Supports flexible logic configuration, can be bound to any warning/danger alarm signals from vibration, displacement, speed, and temperature monitoring channels to achieve multi-point interlock trip and single-point over-limit protection output.
Built-in hardware circuit self-check function, real-time monitoring of the status of the three relays and backplane communication failures, when abnormal, the panel fault light alarms and uploads system event records, facilitating the early detection of potential hazards.
Relay contacts with surge absorption protection, suitable for ETS solenoid valves, trip relays, etc., which sense inductive loads, suppressing reverse voltage breakdown of contacts during switching.
Can be configured in dual-module redundant mode, two TMR modules serve as backups for each other, forming the highest level unit safety protection interlock circuit.
Downward compatible with the entire series of 3500 monitoring modules, old TSI systems can be directly replaced without modifying the cabinet wiring and configuration logic.
Application Domains
Thermal power plants: ETS safety trip output for axial displacement, vibration, and overspeed dangerous signals of turbine generator sets
Gas turbines, cogeneration power plants: Mechanical fault interlock protection, emergency shutdown circuit control for large turbine units
Petrochemical industry: Safety interlock protection for large centrifugal compressors, axial flow fans, turbine drive devices
Metallurgical self-owned power plants, blast furnace turbine blower unit key equipment emergency shutdown protection
Air separation units, coal chemical turbine units, large pump station rotating mechanical equipment safety interlock monitoring
List of Compatible Models in the Same Series
3500/32: 4-channel ordinary single redundant relay module, used for routine alarm output 3500/33: 16-channel high-density ordinary relay module, multi-point alarm signal expansion
3500/34: TMR triple-redundant safety relay module (this model is used for ETS trip safety circuit)
3500/40M: Axial vibration and axial displacement eddy current signal monitoring module
3500/53: Special electronic overspeed protection module
3500/92: 3500 system communication gateway module
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