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The 3500/32M (149986-02) is a high-reliability four-channel relay output module designed for the 3500 Machinery Protection System developed by Bently Nevada. This module provides the critical hardware interface for executing...
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The 3500/32M (149986-02) is a high-reliability four-channel relay output module designed for the 3500 Machinery Protection System developed by Bently Nevada. This module provides the critical hardware interface for executing protective machine trips and activating local or remote alarm annunciators in safety-critical machinery protection architectures.
Unlike high-density relay modules, the 3500/32M (149986-02) is optimized for applications where dedicated, high-integrity relay logic is required for primary shutdown and safety interlock circuits. Each of the four relay channels can be individually programmed using 3500 Rack Configuration Software to respond to specific alarm conditions generated by vibration, position, or process monitoring modules within the rack.
The module incorporates continuous self-diagnostic testing of relay coils and switching circuits to ensure reliable operation. When a machine condition reaches Alert or Danger thresholds, the module provides fast, deterministic contact closure to initiate protective shutdown actions and prevent catastrophic mechanical damage.
| Item | Specification |
|---|---|
| Part Number | 149986-02 |
| Module Type | 4-Channel Relay Output |
| Relay Configuration | 4 Independent SPDT Relays |
| Relay Ratings | 5A @ 24 Vdc / 5A @ 240 Vac (resistive load) |
| Logic Support | Individual or grouped alarm drive logic |
| Alarm Configuration | Normally Energized or Normally De-energized (software selectable) |
| Dimensions | 2.5 cm × 25.8 cm × 12.0 cm |
| Weight | 1.74 kg |
| Operating Temperature | -30°C to +65°C |
The 3500/32M (149986-02) is widely used in:
Power generation turbine protection systems
Oil and gas processing facilities
Chemical and petrochemical plants
Compressor and high-speed rotating machinery protection
Typical functions include triggering:
Emergency stop circuits
Fuel shutoff solenoids
Local alarm annunciators
Safety interlock outputs
What is the difference between 149986-01 and 149986-02?
The 149986-02 is the 4-channel relay configuration, while the 149986-01 is typically associated with higher-density relay modules. Always verify channel count and rack logic requirements before installation.
Does this module support latching alarms?
Yes. The module supports configurable latching logic. Relay outputs can remain energized until a manual or remote reset command is issued after the alarm condition is cleared.
