The Bently Nevada 3500/32M 184631-02 is a 4-Channel Relay Module for the 3500 series machinery protection system. It is a full-height module that provides four relay outputs, each independently programmable to perform voting logic. It is designed for critical alarm and shutdown applications on rotating machinery in power generation, oil & gas, and manufacturing industries.
Item No :
184631-02Order(MOQ) :
1 PiecePayment :
EXW/CIFProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
3kg| Specification | Description |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model | 3500/32M |
| Alternate Part Number | 184631-02 |
| Product Family | 3500 Machinery Protection System |
| Product Type | 4-Channel Relay Module (Full-Height) |
| Number of Relays | 4 independent channels |
| Relay Type | Single-pole, double-throw (SPDT), epoxy-sealed |
| Contact Life | 100,000 cycles @ 5 A, 24 Vdc or 240 Vac |
| Max Switched Voltage | 30 Vdc / 30 Vac (hazardous/SIL); 125 Vdc / 250 Vac (standard) |
| Max Switched Current | 2 A (resistive load) |
| Arc Suppressor | 250 Vrms, installed as standard |
| Operating Mode | Switch-selectable Normally Energized or Normally De-energized |
| Power Consumption | 5.8 W typical |
| Functional Safety | SIL 2 capable |
| Hazardous Area Approvals | ATEX/IECEx/CSA (Class I, Zone 2); cNRTLus (Class I, Div 2) |
| 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 |
| Main Module Dimensions | 241 mm x 24.4 mm x 242 mm |
| Main Module Weight | 0.7 kg (1.6 lb) |
| I/O Module Dimensions | 241 mm x 24.4 mm x 99.1 mm |
| I/O Module Weight | 0.4 kg (1.0 lb) |
| Country of Origin | USA |
| Model | Description | Typical Application |
|---|---|---|
| 184631-02 (this model) | 3500/32M 4-Channel Relay Module | Standard alarm/shutdown logic |
| 149986-02 | Spare 4-Channel Relay Control Module (front card) | Replacement main card for 3500/32M |
| 125720-01 | Spare 4-Channel Relay I/O Module (standard) | Repair/replacement for standard systems |
| 125720-02 | Spare 4-Channel Relay I/O Module (hazardous/SIL) | SIL-certified and hazardous area applications |
| 125712-01 | Spare 4-Channel Relay Module (main card for standard 3500/32) | Legacy 3500/32 applications |
| 3500/33 | 16-Channel Relay Module | High-density relay output requirements |
Q1: What is the primary function of the 3500/32M (184631-02)?
It is a 4-Channel Relay Module that provides four independent relay outputs for alarm and shutdown logic in the 3500 machinery protection system. Each output can be independently programmed to perform voting logic using Alarm Drive Logic with AND/OR combinations of Alert, Danger, Not-OK, or PPL inputs from any monitor channel in the rack .
Q2: Where can the 3500/32M be installed in the rack?
The module can be placed in any slot to the right of the Transient Data Interface (TDI) module. It occupies one full-height front slot and requires one full-height rear slot for the I/O module .
Q3: What is the difference between the 3500/32M and the standard 3500/32?
The 3500/32M is the M-series version that supports SIL 2 functional safety and hazardous area certifications. It uses the 149986-02 main card, while the standard 3500/32 uses the 125712-01 main card. The two are not interchangeable — installing a 3500/32M card in a legacy 3500/32 rack causes functionality issues .
Q4: What are the common causes of channel alarm LEDs staying illuminated?
Common causes include:
Relay coil failure or stuck contact: Cycle the channel's programmed logic in the configuration software and check for continuity across relay contacts
Programming/voting logic misconfiguration: Re-verify the Alarm Drive Logic setup in the 3500 Rack Configuration Software
Backplane communication fault: If TX/RX LED is not flashing, reseat the module and check adjacent modules for the same symptom
Q5: What spare parts are available for the 3500/32M?
Key spares include:
149986-02: Spare 4-Channel Relay Control Module (main card)
125720-01: Spare 4-Channel Relay I/O Module (standard, available for repair only)
125720-02: Spare 4-Channel Relay I/O Module (hazardous area/functional safety)
129771-01: User Guide for 3500/32 and 3500/32M Relay Modules
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