Description
Technical Parameters
- Manufacturer: Bently Nevada (Baker Hughes)
- Model Number: 3500/33
- Configuration: 16-Channel Relay Module
- Safety Rating: SIL 1 (Safety Integrity Level) certified
- Output Type: Electromechanical relays (Single-Pole, Double-Throw – SPDT)
- Input Signal: Digital data from 3500 rack backplane via monitor modules
- Response Time: < 200 ms (standard configuration)
- Contact Rating: 5A @ 24Vdc / 5A @ 240Vac (Resistive)
Product Datasheet
| Specification | Details |
|---|---|
| Model | 3500/33 |
| SIL Level | SIL 1 |
| Channel Count | 16 Independent Relay Channels |
| Relay Logic | Individual, Voting (n-out-of-m), or Combined |
| Mounting | Full-height rack slot (3500 system) |
| Operating Temp | -30°C to +65°C |
| Humidity | 95% Non-condensing |
| Weight | 0.85 kg |
Application Fields
The 3500/33 relay module is essential for machinery protection and automated shutdown:
- Emergency Shutdown (ESD): Triggering machine trips based on vibration, thrust, or temperature alarms.
- Annunciation: Activating local or remote alarms/sirens in industrial plants.
- Logic Voting: Implementing “2-out-of-3” or “1-out-of-2” voting logic to prevent nuisance trips in critical compressors.
- Interlocking: Providing status signals to the plant PLC or DCS for coordinated machine protection.
Product Instructions
- Rack Location: The 3500/33 must be installed in a 3500/05 rack. It can occupy any slot except slot 1 (RIM) and slot 15.
- Wiring Termination: Connect field wiring to the 3500/33 I/O module located at the rear of the rack. Ensure all terminals are tightened to prevent arcing.
- Software Configuration: Use the 3500 Rack Configuration Software to define “Alarm Drive” logic. Each relay can be assigned to specific “Alert” or “Danger” statuses from any monitor in the rack.
- Relay States: Configure relays as “Normally De-energized” or “Normally Energized” (Fail-safe) based on the specific safety requirements of the site.
- SIL Compliance: For SIL 1 applications, ensure the module is installed and maintained according to the Bently Nevada Safety Manual for the 3500 system.
Q&A
Q1: What is the difference between the 3500/32 and the 3500/33? A1: The 3500/32 is a 4-channel relay module, whereas the 3500/33 provides 16 channels, making it more efficient for systems requiring high-density relay outputs.
Q2: Can I hot-swap this module while the machinery is running? A2: Yes, the 3500/33 is hot-swappable. However, removing the module will result in the loss of all relay functions for those 16 channels, which could lead to a machine trip if configured as “Normally Energized.”
Q3: Does the 3500/33 support “OK Relay” functionality? A3: Yes, the module includes a dedicated “System OK” relay that monitors the health of the 3500/33 hardware and its communication with the rack.
Recommended Similar Models
- Bently Nevada 3500/32
- Bently Nevada 3500/34
- Bently Nevada 3500/42M
- Bently Nevada 3500/22M
- Bently Nevada 3500/33-01-00
