72857-01B
May 22, 2026

72857-01B

Model: 72857-01B Brand: Bently Nevada Series: 7200 Series (Legacy TSI) Category: Dual Channel Vibration Monitor (RVXY‑II) Alias: 7200 RVXY‑II, 72857‑01B, Shaft Vibration Monitor, Old‑style TSI Vibration Card

Description

Basic Information

  • Legacy 7200 TSI system (same generation as 72870‑01/‑03, 72869‑02), EOL (End‑of‑Life), only available as refurbished/used/stock units.

  • Rack‑mount, 19” / 3U; front panel with analog meter + Alert/Danger LEDs; rear terminal block wiring.

  • Variant of 72870‑01, compatible form/fit/function, minor hardware revision (B suffix).

Function & Application

  • Dual‑channel (X/Y) independent monitoring for shaft vibration, displacement, and eccentricity.

  • Accepts 3300 series eddy‑current probes (e.g., 33010x).

  • Hardware‑based protection: per‑channel Alert + Danger relays for direct trip interlock, no software dependency.

  • Local indication: analog pointer meter + LED status for on‑site inspection.

Core Specifications

  • Channels: 2 (X/Y)

  • Input: Eddy‑current proximity sensor (3300 series)

  • Range: 0–250 μm (0–10 mil) typical

  • Accuracy: ±1% FS

  • Output: Isolated relay contacts (Alert / Danger)

  • Power: ±15 VDC (7200 rack supply)

  • Status: Discontinued, spare parts only

Compatibility & Replacement

  • Compatible with: 7200 rack, 72870 backplane, 3300 series probes

  • Direct replacement: 3500/40 (72951‑xx) 4‑channel vibration monitor (3500 series standard upgrade)

Summary

72857‑01B = 7200 RVXY‑II
Legacy dual‑channel shaft vibration monitor with analog meter, for 7200 TSI racks; discontinued, commonly upgraded to 3500/40.


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