The Bently Nevada 3500/32 125720-01 is the I/O termination module that completes the 3500/32 4-Channel Relay Module system. Together with the 149986-02 (or 125712-01) main logic board, this assembly provides four independent, programmable relay outputs that serve as the critical link between the 3500 monitoring system and external control devices .
As a full-height module designed for the 3500 Series Machinery Protection System, it translates alarm logic states—such as Alert, Danger, or Not OK conditions—from monitoring modules into physical dry contact outputs. These contacts can directly drive alarm indicators, sirens, machine trip circuits, or PLC/DCS inputs, making it an essential component for hard-wired machinery protection and automated control applications in turbines, compressors, and generators.
Item No :
3500/32 125720-01Order(MOQ) :
1Payment :
EXWProduct Origin :
USAShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
0.6kgProduct Showroom
Bently Nevada 3500/32 125720-01 4-Channel Relay Output Module
Full-Height Relay Module for 3500 Machinery Protection Systems
New and Original
More details
|
Country of origin |
USA |
|
Product condition |
New |
|
Warranty |
one year |
|
Payment Method |
T/T, Western Union |
|
Shipping Method |
DHL/FedEX/UPS/TNE/EMS |
4 Independent Relay Outputs: Provides four fully isolated SPDT (Single Pole Double Throw) relay channels for flexible external control .
Programmable Alarm Drive Logic: Each relay can be independently configured using AND/OR logic based on alarm inputs from any monitoring channel in the rack (e.g., vibration, position, temperature modules) .
Selectable Energization Mode: Each channel can be configured as Normally Energized or Normally De-energized via software, offering fail-safe design flexibility .
High Contact Rating: Rated for 5 A @ 24 VDC or 250 VAC (resistive), capable of driving a wide range of external loads .
DPDT Configuration: Each relay channel consists of two SPDT contacts wired together to form a DPDT (Double Pole Double Throw) configuration, providing additional switching capacity .
Epoxy-Sealed Contacts: Provides robust environmental protection and ensures reliable operation in harsh industrial conditions .
Comprehensive Diagnostics: Front-panel LEDs (OK, TX/RX, CH ALARM) provide instant visual status indication for module health and channel alarm states .
SIL 2 Ready: The 3500 system is available with SIL 2 certification, suitable for safety-related applications .
| Category | Specification |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model Number | 3500/32 |
| I/O Module Part Number | 125720-01 |
| Main Board Part Number (compatible) | 149986-02 / 125712-01 |
| Product Type | 4-Channel Relay Output I/O Module |
| Number of Relays | 4 Independent Channels |
| Parameter | Detail |
|---|---|
| Relay Configuration | Two SPDT wired as DPDT per channel |
| Contact Type | Form C (Dry Contact) |
| Contact Rating (Resistive) | 5 A @ 30 VDC / 250 VAC |
| Minimum Switched Current | 10 mA @ 5 VDC |
| Mechanical Contact Life | 100,000 operations @ 5 A |
| Response Time | < 10 ms |
| Selectable Mode | Normally Energized or Normally De-energized |
| Arc Suppressor | 250 Vrms standard, installed |
| Parameter | Detail |
|---|---|
| Power Consumption | 6 W typical |
| Operating Temperature | -30°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 95% non-condensing |
| Rack Space | 1 full-height front slot + 1 full-height rear slot |
| Component | Dimensions (W x H x D) | Weight |
|---|---|---|
| Main Module (149986-02) | 24.4 x 241 x 242 mm | 0.7 kg |
| I/O Module (125720-01) | 24.4 x 241 x 99.1 mm | 0.4 kg |
| Certification | Details |
|---|---|
| Agency Approvals | CE, CSA/NRTL/C, RoHS |
| Hazardous Locations | Class I, Div 2 (option -01) |
| Compliance | API 670, EN 61010-1, EN 61000-6-2/6-4 |
The 3500/32 Relay Module is widely deployed across industries requiring hard-wired alarm and trip outputs:
| Industry | Application |
|---|---|
| Oil & Gas | Emergency shutdown (ESD) actuation on pipeline compressors; alarm annunciation on offshore platforms |
| Power Generation | Turbine trip and alarm signaling for steam/gas turbines; generator protection |
| Chemical Processing | Critical pump and compressor protection; process alarm integration with DCS |
| Metallurgy & Mining | Crusher, mill, and blower protection systems; heavy machinery condition monitoring |
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