Configured for discrete signal acquisition and alarm relay actuation in Bently Nevada TSI systems, the Bently Nevada 81545-01 (Signal Input/Alarm Output Module) provides direct physical/electrical execution of machinery protection logic.

Hardware Specifications

Cross-Talk Suppression and Relay Contact Timing

Signal integrity is maintained through hardware-based cross-talk suppression between adjacent input channels. Relay output timing follows a fixed debounce period to prevent nuisance tripping from transient vibration events. The module interfaces directly with the system monitor to latch alarm states until manually reset or cleared via the rack communication bus. Channel isolation is implemented to prevent ground loops between field wiring and the backplane.

Technical Inquiries

Q: Is the 81545-01 module compatible with the 3500 series rack?

A: No. This module is designed for legacy TSI systems and is not mechanically or electrically compatible with 3500 series racks.

Q: What is the maximum switching capacity of the alarm relays?

A: The relay contacts are rated for low-energy signal switching. Refer to the system manual for derating curves based on inductive vs resistive loads.

Q: Does this module require calibration?

A: No calibration is required. The module functions as a passive interface between field devices and the system processor.

Field Wiring and Grounding Practices

Secure the module into the designated slot of the TSI chassis. Use shielded twisted-pair cable for all input wiring. Terminate the shield drain wire at the rack ground terminal only. Ensure relay output wiring is separated from high-voltage power conductors by a minimum of 15 cm (6 inches). Verify proper seating of the card-edge connector before applying power.

Ordering Information

• 81545-01 Signal Input/Alarm Output Module
• Discontinued product, supplied as new surplus or refurbished stock
• Includes factory protective anti-static sleeve

Logistics Data

Dispatch occurs within 3-5 days upon payment clearance. Shipments are executed via DHL, FEDEX, or UPS. All units are packaged in anti-static industrial-grade materials with reinforced outer cartons to mitigate transit damage.