Description
Bently Nevada 130731-01 Relay Module
The Bently Nevada 130731-01, also cataloged as the 130731 relay module, serves as the primary alarm and trip relay execution unit utilized to execute monitoring-driven switching logic across 3500 Machinery Protection System platforms. It converts processed condition signals from rack-based monitoring modules into isolated Form C relay state transitions.
Suffix Breakdown & Model Matrix
Hardware Specifications
| Parameter |
Specification |
| Model |
130731-01 |
| Brand |
Bently Nevada |
| Origin |
USA |
| Weight |
0.45 kg |
| Dimensions |
150 mm × 100 mm × 50 mm |
| Operating Temp |
–40 deg C to +85 deg C |
| Power Consumption |
Powered via 3500 rack backplane |
| Relay Outputs |
4 independent channels |
| Relay Type |
Form C (SPDT) |
| Contact Rating |
2 A at 30 VDC (resistive) |
| Input Source |
3500 monitoring module alarm/trip signals |
| Storage Temperature |
–40 deg C to +85 deg C |
| Humidity |
5%–95% non-condensing |
Relay Isolation and Fail-Safe Switching Architecture
The module implements galvanically isolated relay output stages to separate field wiring from internal rack logic domains. This separation prevents backfeed coupling during transient switching events.
Relay actuation is driven by deterministic alarm evaluation states originating from 3500 monitoring modules. Contact transition behavior follows defined logic thresholds for Alert and Danger conditions, ensuring consistent trip execution timing across all channels.
Form C contact structure enables configurable normally open or normally closed wiring topologies without internal hardware modification. Electrical endurance is constrained by 2 A at 30 VDC resistive load envelope, defining external circuit design limits.
Frequently Asked Questions (FAQ)
Q: Can the 130731-01 be hot-swapped during rack operation?
A: Yes. The module supports hot-swap insertion and removal when the 3500 rack remains powered, following insertion alignment procedure.
Q: Are relay outputs electrically isolated from input monitoring signals?
A: Yes. Relay output stages are galvanically isolated from internal monitoring circuitry.
Q: What is the switching limitation of each relay channel?
A: Each channel is limited to 2 A at 30 VDC resistive load. Inductive loads require external suppression.
Field Installation Guidelines
Insert the module into a validated 3500 rack slot with full backplane connector engagement. Partial insertion may disrupt relay logic synchronization.
Route relay output wiring separately from low-level sensor and vibration input cabling to avoid electromagnetic coupling. Maintain shield continuity and terminate at designated rack ground reference points.
Verify alarm and trip logic mapping in configuration software prior to energization. Perform dry contact switching tests to confirm correct relay state transitions under simulated fault conditions.
