The Bently Nevada 3500/34-01-00 is a Triple Modular Redundant (TMR) Relay Module for the 3500 series machinery protection system. It consists of two half-height TMR Relay Modules and one full-size TMR Relay I/O Module, working together with a dedicated TMR Rack Interface Module and three monitor modules to provide 2-out-of-3 voting for critical relay outputs.
Item No :
3500/34-01-00Order(MOQ) :
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EXW/CIFProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
3kg| Specification | Description |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model | 3500/34-01-00 |
| Product Family | 3500 Machinery Protection System |
| Product Type | TMR Relay Module (2 half-height modules + 1 full-size I/O module) |
| Number of Relay Channels | 4 channels |
| Relay Configuration | 12 relays total (4 channel groups × 3 relays each) |
| Voting Logic | 2-out-of-3 (2oo3) relay voting per channel |
| Relay Type | Three DPDT relays in SPST configuration |
| Contact Life | 100,000 cycles at 1.5 A, 24 Vdc, or 1 A, 120 Vac |
| Arc Suppressor | Not supported |
| Relay Operation | Normally Energized (NE) |
| Power Consumption | 9.6 W typical |
| LED Indicators | OK, TX/RX, CH ALARM |
| Operating Temperature | -30°C to +65°C (-22°F to +150°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Humidity | 95%, non-condensing |
| Relay Module Dimensions | 120.4 mm x 24.6 mm x 241.8 mm |
| Relay Module Weight | 0.34 kg (0.74 lb) |
| I/O Module Dimensions | 241 mm x 24.4 mm x 99.1 mm |
| I/O Module Weight | 0.5 kg (1.0 lb) |
| Rack Space | 1 half-height front slot (per relay module); 1 full-height rear slot (I/O module) |
| Country of Origin | USA |
| Model | Description | Typical Application |
|---|---|---|
| 3500/34-01-00 (this model) | TMR Relay Module, 2oo3 voting, 4 channels | Safety-critical machinery protection with TMR |
| 125696-01 | TMR Relay Module (half-height, main card) | Spare/replacement relay module |
| 125704-01 | TMR Relay I/O Module (full-height) | Spare/replacement I/O module |
| 149986-02 | Spare 4-Channel Relay Control Module (for 3500/32M) | Standard (non-TMR) relay applications |
| 125720-01 | Spare 4-Channel Relay Output Module (for 3500/32M) | Standard relay output (repair only) |
| 125720-02 | Spare 4-Channel Relay Output Module (hazardous/SIL) | Hazardous area and functional safety |
Q1: What is the primary function of the 3500/34-01-00?
It is a TMR Relay Module that provides high-reliability relay outputs for safety-critical machinery protection applications. It uses three independent relays to drive a single relay output, working with a TMR Rack Interface Module and three monitor modules to provide 2-out-of-3 voting for inputs. This architecture ensures that a single component failure cannot disable critical equipment protection functions .
Q2: How does the TMR voting logic work?
The TMR Relay Module evaluates alarm signals from three independent data paths provided by three monitors. It generates three alarm contact signals and sends them to the TMR Relay I/O Module, which contains 12 relays arranged in four channel groups of three. For each channel, the three signals are fed to three separate relays, and the output is determined by 2-out-of-3 voting. If a data path's OK status is NOT OK, the corresponding alarm contact signal is invalidated .
Q3: What is the difference between the 3500/34 and the standard 3500/32M relay module?
The 3500/34 is the TMR version designed for the highest availability applications, using three independent relays and 2oo3 voting. The 3500/32M is a standard 4-channel relay module for non-TMR applications. Both are full-height modules, but the 3500/34 consists of two half-height relay modules plus one full-size I/O module .
Q4: What are the contact ratings for the 3500/34?
The relay contacts are rated for:
Maximum switched power: 60 W DC, 125 VA AC
Maximum switched current: 2 A
Maximum switched voltage: 150 Vdc, 220 Vac
Minimum switched current: 100 mA @ 5 Vdc
Contact life: 100,000 cycles
Q5: What are the typical applications for the 3500/34?
It is used in gas turbine protection systems, compressor emergency shutdown logic, high-integrity safety interlock systems, power generation machinery protection, and other critical rotating equipment applications where redundancy is required.
The Bently Nevada 3500/60-01-00 is a 6-Channel Temperature Monitor for the 3500 Machinery Protection System. The complete configuration consists of the 163179-01 Temperature Monitor (main card) and the 133819-01 RTD/TC I/O Module with internal terminations.
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System, configured with the 286566-01 Overspeed Detection main card and the 133396-01 Overspeed Detection I/O Module.
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System. The 3500/53M is the split-base M-series version, using the 286566-01 main card with the 133396-01 rear I/O module. It is not drop-in compatible with the legacy 3500/53 (133388-01).
The Bently Nevada 3500/53M-01-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System. The 3500/53M is the split-base M-series version, using the 286566-01 main card with the 133396-01 rear I/O module. It is not drop-in compatible with the legacy 3500/53 (133388-01).
The Bently Nevada 3500/53-03-00 is a Single-Channel Electronic Overspeed Detection Module for the 3500 Machinery Protection System, configured with the 133388-01 Overspeed Detection main card and the 133396-01 Overspeed Detection I/O Module.
he Bently Nevada 288062-02 is the Tachometer Module main card for the 3500/50M Tachometer Module in the 3500 Machinery Protection System. It is a dual-channel module that accepts input from proximity probes or magnetic pickups to determine shaft rotational speed, rotor acceleration, and rotor direction.
The Bently Nevada 3500/50M-01-00 is a 2-Channel Tachometer Module for the 3500 Machinery Protection System, configured with the 288062-02 Tachometer main card and the 133442-01 I/O Module with internal terminations. The "M" designation indicates M-series functionality, providing enhanced integration with System 1 diagnostic software.
The Bently Nevada 133442-01 is a dual-channel Tachometer I/O Module with Internal Terminations, designed for the 3500/50 Tachometer Module in the 3500 Machinery Protection System. The module conditions raw pulse signals to determine shaft rotational speed, rotor acceleration, and rotor direction, and can supply conditioned Keyphasor signals to the rack backplane for use by other monitoring modules.
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