Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | 4-Channel Relay Module |
| Relay Contact Type | SPDT, epoxy-sealed |
| Typical Power Draw | 5.8 W |
| Contact Rating | 2 A @ 240 VAC / 2 A @ 30 VDC |
| Relay Mode | Normally energized or normally de-energized, software selectable |
| Logic Options | AND, OR, voting, latching per channel |
| Operating Temperature | -30 °C to +65 °C |
| Humidity | 5% to 95%, non-condensing |
| Rack Placement | Slots to the right of the TDI module |
| Mounting | Full-height 3500 rack slot |
| Compliance | API 670, CE |
| Weight | 0.40 kg |
Product Introduction
The Bently Nevada 3500/32M is the 4-channel relay module for the 3500 machinery protection rack. It reads Alert, Danger, and Not OK status from all monitor channels in the rack and drives isolated dry contact outputs. Each relay runs independent logic rules set inside the rack configuration software.
This module delivers local hard contact action independent of plant communication networks. It is commonly used for smaller trip and alarm groups where the 16-channel 3500/33 would waste rack slots.
3500/32M
3500/32M
3500/32M
3500/32M
Application Scenarios & Field Experience
Many compact TSI rack layouts only need a small number of dedicated trip contacts. Using a high-density relay card leaves unused channels and complicates spare parts strategy. This 4-channel unit fits smaller protection groups while keeping voting logic local.
- Power generation – auxiliary boiler feed pumps, bearing vibration pre-alarm and emergency trip
- Oil & gas – small screw compressor skids, separate fault alarm and shutdown solenoid control
- Petrochemical – process fans, two-out-of-three voting for thrust position trip
- Industrial utility – backup turbo generators, local annunciator panel trigger points
In my experience at a mid-sized gas plant, the original 3500/32M lost one relay channel to coil burnout after a wiring fault. The team isolated the machine and installed a spare 3500/32M. The existing configuration file loaded without edits, and all four contacts passed bench actuation tests. The unit returned to service within the scheduled shutdown window, and the remaining three original relay channels were not affected.
Standard Operating Procedure (SOP) for Quality Control
- Visual & Origin Inspection: Verify OEM faceplate marking, serial format, and seal integrity; inspect rear connector pins for bending or rework traces.
- Live Rig Testing: Install in a 3500 test rack, simulate Alert and Danger states, confirm pull-in and drop-out for all four relay channels.
- Firmware Verification: Record firmware revision and cross-check compatibility with the target rack firmware stack.
- ESD-Safe Packaging: Use static-dissipative bag and foam; attach printed test log before sealing the outer carton.
Frequently Asked Questions
Q1: Does 3500/32M work alongside 3500/33 relay modules in the same rack? A: Yes. Both relay types can coexist. Confirm your rack firmware supports mixed relay module types before loading your configuration.
Q2: What warranty do you provide on this unit? A: We offer 12 months from shipment date. The warranty covers confirmed hardware failure; it excludes contact burnout, overvoltage damage, and incorrect logic setup.
Q3: How fast can this unit ship if it is in stock? A: Stock units ship within 1–3 business days after payment confirmation. Confirm stock status before locking your shutdown window.
Q4: Can firmware mismatch break latching or voting logic? A: Yes. Older firmware builds may not support all voting combinations or latching behavior. Match the revision used at site commissioning.
Q5: Can I hot-swap this relay module while the machine is online? A: Hot-swap is physically allowed, but any trip logic assigned to its four channels will be inactive during the swap. Do not hot-swap if these channels are part of an active safety shutdown loop.
