Description
Key Technical Specifications
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Model Number: 3500/22-01-01-00 138607-01
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Manufacturer: Bently Nevada (Baker Hughes)
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Channels: 4 independent (configurable for analog/digital inputs)
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Input Type: Analog (±10V, 4-20mA), digital (contact closure, TTL)
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Sampling Rate: Up to 1MHz per channel (burst mode for transient events)
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Event Storage: 128MB non-volatile memory (stores up to 50 transient events)
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Trigger Sources: 3500 monitor trip signals, external contact inputs, software commands
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Communication Interfaces: 1x 10/100Mbps Ethernet (TCP/IP, Modbus TCP), 1x RS485 (Modbus RTU)
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Operating Temperature: 0°C to +65°C (rack-mounted)
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Storage Temperature: -40°C to +85°C
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Electrical Isolation: 500Vrms (channel-to-rack, per IEC 60664-1)
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Dimensions: 119mm x 25mm x 102mm (WxHxD, 3500 half-height slot)
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Weight: 0.14kg
3500/22-01-01-00 138607-01
Field Application & Problem Solved
In the field, when a machine trips (e.g., turbine overspeed, compressor surge), the 3500 monitor logs the trip but rarely captures the cause—the milliseconds of vibration, pressure, or speed data leading up to failure. Technicians are left guessing, wasting days disassembling equipment. This TDI module solves that by acting as a “flight recorder” for machinery: it hooks into the 3500 framework, waits for a trip trigger, then bursts at 1MHz to capture analog/digital signals before and afterthe event. You’ll find it on steam turbines (capturing overspeed blade vibration), gas compressors (recording surge-induced pressure spikes), or generators (logging rotor winding faults). Its core value is forensic data: 128MB storage holds 50+ events, with timestamps synced to the 3500 clock. For example, in a refinery’s hydrocracker turbine, it captured a 2ms spike in bearing vibration beforethe trip—proving a failed lubrication line, not a rotor issue. The 138607-01 variant adds enhanced Ethernet buffering for noisy plant networks.
Installation & Maintenance Pitfalls (Expert Tips)
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Incorrect Trigger Mapping: Rookies tie triggers to “trip” outputs, missing pre-trip data. Configure the 3500/22 to trigger 500ms beforethe trip signal (via 3500 Configuration Software) to capture the event’s onset.
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Ignoring Sampling Rate Tradeoffs: 1MHz sampling eats memory fast. For slow processes (e.g., pump speed), set channels to 10kHz to extend storage. Reserve 1MHz for high-frequency faults (bearing tones, gear mesh).
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Poor Ethernet Cable Shielding: The 3500/22’s Ethernet port is sensitive to EMI. Use shielded Cat6 with metal RJ45 connectors, and route away from VFDs. Disable auto-negotiation—force 100Mbps full-duplex.
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Skipping Firmware/Software Sync: The 138607-01 firmware requires Bently System 1 v7.0+. Mismatched versions cause “event upload failed” errors. Always update both via Bently Update Manager.
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Neglecting Regular Event Purge: The 128MB memory overwrites oldest events when full. Set a monthly purge schedule via System 1 to archive critical events to the plant historian—don’t wait for a full buffer.
3500/22-01-01-00 138607-01
Technical Deep Dive & Overview
The 3500/22-01-01-00 138607-01 is a Transient Data Interface (TDI) module for Bently’s 3500 Machinery Protection System. It bridges 3500 monitors (e.g., 3500/42M vibration, 3500/40 speed) and external analysis tools by capturing high-speed transient data. When a 3500 monitor detects a trip (e.g., overspeed, vibration超限), it sends a trigger to the 3500/22, which immediately starts burst sampling at 1MHz on all 4 channels. Analog inputs (±10V, 4-20mA) are digitized via 16-bit ADCs; digital inputs (contact closures) are timestamped. Data is stored in a circular buffer (128MB) with nanosecond resolution, tagged with the 3500 system time. Post-event, the module uploads data via Ethernet to Bently System 1 software, where engineers replay waveforms to pinpoint failure causes. The 138607-01 variant adds improved error correction for Ethernet packet loss in noisy environments. In short, it’s the “black box” of the 3500 system—turning vague trip alarms into actionable failure evidence.
