Bently Nevada 3500/22M 3500/22-01-01-01 TDI Module and I/O Ready For Ship

The BENTLY NEVADA 3500/22-01-01-01 is a Transient Data Interface (TDI) Module that serves as the bridge between a 3500 Series monitoring system and host software like System 1 Condition Monitoring and 3500 Configuration Software. It combines the functions of a legacy 3500/20 Rack Interface Module (RIM) with the data collection capabilities of a communication processor. Installed in Slot 1 adjacent to the power supplies, the 3500/22-01-01-01 continuously collects steady-state and transient dynamic (waveform) data from M-series monitors (3500/40M, 3500/42M, etc.) and transmits it via Ethernet. The module is not part of the critical monitoring path, ensuring automatic machinery protection functions remain unaffected.

Turbomachinery Monitoring: Compressors, steam turbines, gas turbines

Power Generation: Turbines, generators, large motors in coal, gas, hydro, and nuclear plants

Oil & Gas: Refineries, LNG plants, offshore platforms – monitoring pumps, compressors, and rotating equipment

Petrochemical & Chemical Processing: Critical pumps and fans

Manufacturing: High-speed rotating machinery and large industrial fans

Mining: Heavy-duty compressors and critical pumps

Predictive Maintenance Programs: Vibration analysis, fault detection (shaft instability, bearing wear, rotor misalignment), startup/coastdown diagnostics, and transient event capture

Integrated RIM + Communication Processor: Combines traditional 3500/20 Rack Interface Module (RIM) functionality with advanced transient data capture capabilities in a single module

Dual-Mode Data Collection: Supports both steady-state (static) data and high-resolution dynamic (transient waveform) data capture for comprehensive diagnostics

10Base-T/100Base-TX Ethernet Communication: Standard copper Ethernet I/O (146031-01) provides seamless integration with host software; RJ-45 connector, autosensing, supports BN Host and BN TDI protocols via TCP/IP

Keyphasor Support: Interfaces with four 3500 system Keyphasor inputs for synchronous waveform capture based on once-per-revolution timing; supports multi-event speed inputs up to 20 kHz

Startup & Coastdown Data Collection: Programmable speed and time increments for capturing transient behavior during machine acceleration and deceleration phases

Pre/Post-Alarm Data Capture: Collects static values at 1-second intervals (10 min before/1 min after alarm) and at 100ms intervals (20 sec before/10 sec after); 2.5 min waveform data before, 1 min after alarm

Front Panel USB Configuration Port: USB-B port for local configuration, data retrieval, and diagnostics using BN Host Protocol

Hardware Rack Reset Button: Clears latched alarms and Timed OK Channel Defeat directly from the front panel

Configuration Keylock Switch: Locks rack in RUN mode to prevent unauthorized reconfiguration; key removable in either position

OK Relay (Normally Energized): Indicates overall rack health status; user-selectable NO/NC configuration for NOT OK condition

Hot-Swappable: Allows module replacement without powering down the entire rack (subject to approved procedures and redundant power supplies)

I/O Module Signal Common Terminal: 2-pin connector for single-point instrument grounding to reduce electrical noise

Trip Multiply & Alarm Inhibit Inputs: Dry contact system contacts (<1 mA) for external control of rack operations

Address Switch: 127 possible rack addresses for multi-rack system configuration

Rack-wide Interface & Communication: Acts as the central communication hub for the entire 3500 rack, managing configuration, status inquiries, and data routing between monitoring modules and external software

Steady-State Data Collection: Continuously captures static measurement values from all installed M-series monitors at configurable intervals for trending and baseline analysis

Transient Dynamic Waveform Capture: Collects high-resolution vibration waveforms during critical machine events such as startups, shutdowns, alarms, and speed transients (requires optional Channel Enabling Disk). Supports both synchronous (speed-referenced) and asynchronous (time-referenced) sampling

Alarm Event Recording: Automatically captures pre- and post-alarm data (static values at multiple time resolutions and waveform data) for forensic analysis of fault evolution

Transient Event Initiation: Triggers transient data collection based on machine speed detection within programmable windows for targeted diagnostic capture

Keyphasor-Based Synchronous Sampling: Uses Keyphasor signals to synchronize waveform capture with shaft rotation, enabling orbit plots, shaft centerline analysis, and full spectrum presentations

Ethernet Data Streaming: Transmits collected static and dynamic data to System 1 Condition Monitoring and Diagnostic Software for real-time machinery health assessment and long-term asset management

Rack Configuration Management: Enables local (via USB) or remote (via Ethernet) configuration of the entire 3500 monitoring system using 3500 System Configuration Software

System Status Indication: Provides front-panel LEDs (OK, TX/RX, TM, CONFIG OK) to indicate operational status, communication health, active Trip Multiply mode, and configuration validity

OK Health Monitoring: Uses the normally energized OK relay to signal overall rack OK/NOT OK status to external systems (DCS, ESD, PLC)

Trip Multiply & Alarm Inhibit Control: Processes external dry contact inputs to temporarily multiply alarm setpoints (e.g., for startup by-pass) or suppress all alarms in the rack

Q1: What is the difference between Bently Nevada 3500/22-01-01-01 and the legacy 3500/20 RIM?

A1: The 3500/22-01-01-01 Transient Data Interface (TDI) replaces the older 3500/20 Rack Interface Module (RIM) but is not a direct drop-in replacement. Unlike the legacy RIM, the 3500/22-01-01-01 integrates both rack interface functions and high-speed transient data capture capabilities, eliminating the need for a separate external communication processor. It supports Ethernet-based communication (Modbus TCP/IP, OPC) rather than proprietary serial protocols, and enables predictive maintenance through high-resolution waveform capture during startups, coastdowns, and alarm events. However, you cannot directly import a 3500/20 configuration file; a new configuration must be created using compatible software.

Q2: Does the 3500/22-01-01-01 affect the machinery protection functions of my 3500 rack?

A2: No. The 3500/22-01-01-01 is specifically designed not to be part of the critical monitoring path. Protection logic—including alert and danger alarm evaluation and relay activation—resides entirely within the individual monitoring modules (3500/40M, 3500/42M, etc.). The TDI handles configuration, data acquisition, and communication to host software only. Even if the TDI loses communication or fails, the protection functions of the rack continue to operate independently, ensuring machine safety.

Q3: What types of data can the 3500/22-01-01-01 collect, and do I need any optional components?

A3: The 3500/22-01-01-01 can collect steady-state (static) data as a standard feature, including amplitude and phase measurements for each monitoring point. To capture high-resolution transient (dynamic) waveform data—such as startup/coastdown records, pre/post-alarm waveforms, and synchronous orbit data—you must purchase a Dynamic Data Enabling Disk (3500/09). Two levels are available: Steady-State Points (000 to 672) for alarm-triggered and scheduled waveform capture, and Transient Points (002 to 672), which add speed-triggered waveform collection. The sum of both fields must be ≤672, and one disk can support multiple TDI modules.

Q4: Can I hot-swap a 3500/22-01-01-01 module if it fails?

A4: Yes, the 3500/22-01-01-01 is designed to be hot-swappable, but only under specific conditions. The rack must have redundant power supplies installed, and the replacement must follow the manufacturer‘s approved hot-swap procedures and your facility’s Lockout/Tagout (LOTO) policy. Always wear properly grounded ESD protection (wrist strap and mat), handle the module by its edges, and avoid touching the gold-plated connector fingers. If you are uncertain about your rack configuration or approved procedures, it is safer to power down the rack before performing any module replacement.

Q5: Which Ethernet cable and USB cable are required for the 3500/22-01-01-01, and are there any grounding considerations?

A5: For Ethernet communication (10Base-T/100Base-TX), use standard shielded Category 5 (Cat5e or better) cable with RJ-45 connectors. Maximum length is 100 meters (328 feet). For local configuration via USB, you must use the Bently Nevada USB cable part number 123M4610 (included with the 3500 rack) to maintain proper electrical isolation between chassis and ground. Additionally, the computer attached to the USB port must operate from battery power—not connected to AC mains ground—to prevent creating a ground loop. To ensure proper signal integrity, the I/O Module Signal Common terminal should be connected to a single-point instrument ground, and the PIM selector switch must be set to the position marked \“HP\” to isolate Signal Common from chassis (safety) ground.

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