Bently Nevada 3500/20 125760-01 Rack Interface Module (RIM) – Data Manager I/O Card - Image 1

Bently Nevada 3500/20 125760-01 Rack Interface Module (RIM) – Data Manager I/O Card - Image 2

Bently Nevada 3500/20 125760-01 Rack Interface Module (RIM) – Data Manager I/O Card

Technical Specifications
– Processor & memory : 1 GHz ARM dual-core, 2 GB DDR3 RAM, 1 GB flash for firmware & event buffer
– Input channels : 4 independent digital/analog ports, software-configurable for eddy-current, accelerometer, velocity or TTL speed probes
– Measurable parameters : vibration velocity, acceleration, displacement, shaft position, phase, speed
– Frequency range : 0.5 Hz – 10 kHz (–3 dB) with selectable high-pass, low-pass and 50/60 Hz notch filters
– Sampling rate : 24 kHz max per channel, synchronous across all 3500 monitors
– Resolution : 16-bit ADC, <0.02 % linearity, <30 ppm/°C drift
– Data storage : >1 000 000 measurement points or 1 000 alarm transients with time stamp
– Communication ports :
– 10/100 Mb copper Ethernet (Modbus TCP, proprietary Bently protocol)
– RS-232 / RS-485 (38.4 kbaud, Modbus RTU, DDE)
– Optional fiber-optic Ethernet for Zone-2 hazardous areas
– Isolation : 1 500 Vac channel-to-ground, 500 V channel-to-channel
– Power draw : 5 W typical, supplied directly from 3500 rack 24 Vdc back-plane
– MTBF : >250 000 h @ 45 °C per MIL-HDBK-217F
– Operating temperature : –40 °C to +85 °C (no fan required)
– Storage temperature : –55 °C to +125 °C
– Humidity : 5 %–95 % non-condensing
– Shock / vibration : 15 g half-sine 11 ms; 5 g 5–500 Hz sinusoidal operational
– Dimensions : 120 mm × 75 mm × 25 mm (4.75″ × 2.95″ × 0.98″)
– Weight : 0.2 kg (0.44 lb)
– Agency approvals : CE, UL/cUL Class I Div 2, ATEX Zone 2, IECEx, RoHS

Category: Bentley

Description

Functional Highlights
– Slot-1 mandatory – every 3500 rack requires one RIM; auto-detects and addresses all installed monitor modules
– Dual redundancy – two RIMs can be fitted in TMR racks for seamless switch-over (<5 ms) without data loss
– Hot-swappable – insertion/extraction under full rack power without interrupting protection or process monitoring
– Time sync – accepts IRIG-B, SNTP or PTP to timestamp events to ±1 ms across entire plant network
– Event historian – captures start-up transients, alarm logs and operator actions with 1 ms resolution
– Firmware flash – field-upgradeable via Ethernet in <3 min; rollback image stored for safety
– TMR ready – special firmware performs 2-out-of-3 channel voting when used in triple-modular-redundant racks
– Cyber-secure – supports role-based access, SSL/TLS encryption and syslog forwarding to SIEM platforms

Application Scenarios
– Steam & gas turbine TSI cabinets – interfaces rack data to GE Mark VIe, Siemens T3000 or Emerson Ovation DCS
– Offshore platform centrifugal compressors – redundant fiber-Ethernet rings send vibration data to onshore System 1 servers
– LNG refrigeration trains – 24 kHz streaming captures gear-mesh harmonics for early tooth-fault detection
– Ethylene hyper-compressors – local RS-232 port allows portable analyzer connection during turnarounds without rack shutdown
– Cross-country pipeline pump stations – IRIG-B time sync aligns multiple racks along 500 km right-of-way for accurate event sequencing
– Steel mill blast-furnace blowers – Zone-2 certification permits direct mounting in hazardous junction boxes
– Wind-turbine test stands – high-speed Modbus TCP feeds real-time data to LabVIEW or MATLAB for modal analysis

Installation & Maintenance
Slides into slot 1 of any 3500 rack; captive screws provide chassis earth bond. Front LEDs indicate module healthy, network link, serial activity and sync status. RJ-45 and DB-9 front connectors accept standard Cat-5e and null-modem cables; no separate power wiring is required. Onboard predictive diagnostics report fan life, supply margin and internal temperature over the same Ethernet link, enabling fully remote health dashboards. Module replacement takes <1 min; all rack parameters remain stored non-volatilely on every monitor, so no re-configuration is necessary.

Compatibility
Backward- and forward-compatible with every 3500 monitor produced since 1998 (3500/40M, 3500/42M, 3500/44M, 3500/45, 3500/46M, 3500/50, 3500/60, 3500/62, 3500/70M, 3500/72M, 3500/77M, 3500/90, 3500/92, 3500/93). Operates seamlessly with legacy TDIX/DDIX and current TDI communication processors. Supported by System 1 v6.5 onward and by third-party OPC UA, Modbus and DNP3 clients.

Ordering Reference
3500/20-01-02-00 125760-02 – Standard RIM, copper Ethernet, RS-232, conformal coat
3500/20-01-03-00 125760-02 – As above plus fiber-optic Ethernet port
3500/20-AXX-BXX-CXX – Full modular option table for cable length, firmware revision and hazardous-area certification

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