Brand: Bently Nevada

Bently Nevada 87870-01 Serial Data Interface 3300

Name: Bently Nevada 87870-01 Serial Data Interface 3300
Brand: Bently Nevada

Description

Overview

The Bently Nevada 87870-01 is the printed wiring assembly (PWA) of the 3300 System Serial Data Interface (SDI) module, the interface that connects a 3300 rack to a host computer over a serial link. It is a genuine Bently Nevada spare used with the 3300/03 System Monitor to exchange static data between the monitoring rack and the plant information system.

In a 3300 monitoring system the SDI option gathers the static measurement values from the rack and makes them available to a host system, complementing the Dynamic Data Interface (DDI) which streams dynamic waveforms. The Bently Nevada 87870-01 PWA is the heart of that interface card and is the correct replacement when the original SDI board fails.

Engineering & Design

The Bently Nevada 87870-01 is described in the official 3300 System Serial Data Interface and Dynamic Data Interface Operation Manual as the SDI hardware of the 3300/03 System Monitor. The SDI collects static data from the monitor channels and transmits it to a host system, while the DDI provides dynamic data transfer; both are options available with the 3300/03 System Monitor.

In practice the SDI module appears in the 3300 rack as the interface card that the host computer polls for the steady-state values of every connected monitor channel: overall vibration, gap, temperature and process signals. Because the SDI shares the rack with the 3300/03 System Monitor, its communication parameters must match the host configuration, and the associated manuals cover the exact wiring and register mapping. For plants running data historians or control-room workstations, keeping a spare 87870-01 board on the shelf avoids long downtime when the original card degrades, since the module is no longer in current production.

Installation and troubleshooting follow the 3300 System manual set: system overview (80171-01), installation instructions (80172-01) and troubleshooting (80173-01), together with the 3300/03 System Monitor manual (89604-01). The SDI/DDI hardware upgrade kit carries part number 104006-01 and the firmware upgrade kit 104007-01.

Key Features

Genuine Bently Nevada 87870-01 Serial Data Interface PWA
Serial interface between the 3300 rack and a host computer
Used with the 3300/03 System Monitor
Collects static data from monitor channels
Backed by the official 3300 System SDI/DDI operation manual
Correct 1:1 replacement for the original SDI board

Applications

3300 Series rack-to-host serial communication
Connection of vibration monitors to plant data historians
Replacement of failed SDI boards in 3300 monitoring systems
Spare stock for turbine and compressor protection cabinets

Specifications

Manufacturer	Bently Nevada (Baker Hughes)
Part number	87870-01 (PWA)
Product	3300 System Serial Data Interface (SDI) module
Host system	3300/03 System Monitor
Function	Collects static data and interfaces the 3300 rack to a host
Related manuals	3300 System SDI/DDI Operation Manual (80171/80172/80173 series)
Upgrade kits	Hardware 104006-01, firmware 104007-01

Compatibility

The Bently Nevada 87870-01 SDI module is compatible with the 3300/03 System Monitor and the 3300 rack family. It works alongside the 3300/12 power supply and the 3300/03 System Monitor modules, and pairs with the Dynamic Data Interface option for full data access.

Ordering Information

Order the Bently Nevada 87870-01 Serial Data Interface PWA as the direct replacement for the SDI board in your 3300 rack. Confirm the firmware level of your 3300/03 System Monitor; the SDI/DDI firmware upgrade kit 104007-01 is available for older monitors.

The 87870-01 serial data interface links the 3300 monitoring system to the host computer, and the interface supports the data acquisition of the vibration parameters.

The Bently Nevada 87870-01 serial data interface connects the vibration rack to the plant historian and the DCS for the continuous values.

Why Seven Star LLC

Seven Star LLC supplies Bently Nevada monitoring spares to power and process plants across Oman and the GCC.

Our engineers help you verify the exact model and revision before ordering, avoiding costly mismatches.

Identifying the Correct SDI Board

Before ordering, confirm the part number printed on the board itself rather than relying on the rack description alone, because several 3300 option boards look similar. Record the following from the installed card:

PWA part number and revision marked on the board
Firmware revision of the 3300/03 System Monitor
Whether a Dynamic Data Interface (DDI) is also fitted
Host type and the serial communication settings used on site

If the monitor firmware is older, check whether the 104007-01 firmware upgrade kit is needed for compatibility.

SDI Replacement and Commissioning

Record all communication settings before removing the old board, and follow site procedures for work on a machinery protection rack, since the System Monitor also handles rack-level functions. Handle the board with ESD precautions and seat it firmly in its connector. After power-up, confirm the rack returns to normal status, verify the SDI communication parameters, and check from the host that the static values of every channel update correctly and match the monitor readings.

Troubleshooting the Host Link

No response to host polling – mismatched baud rate, address or protocol settings, or an incorrect cable pinout
Some channels missing – check the register mapping in the host against the rack configuration
Intermittent errors – long serial runs without proper screening or grounding

Applications in Oman and the GCC

Many gas turbines, compressors and steam turbines in Omani power and process plants are still protected by 3300 racks. Holding a spare Bently Nevada 87870-01 keeps the link to the historian or DCS available while longer-term migration to newer monitoring platforms is planned.

Request a Quote for Bently Nevada 87870-01 Serial Data Interface 3300

For the Bently Nevada 87870-01 or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your configuration and application details, and our specialists will respond with a detailed commercial proposal and the official Bently documentation.

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About brand

Bently Nevada is the American machinery protection and condition monitoring brand behind the 3500 rack, the 3300 XL proximity probe and the System 1 software. It was founded in 1961 in Minden, Nevada, and is today a Baker Hughes business.

Seven Star LLC is an independent supplier in Muscat. We list Bently Nevada monitors, I/O modules, probes, proximitors, velocity transducers and transmitters for rotating equipment in Oman and the GCC, and source them by full part number.

Bently Nevada company profile

Established	1961, Minden, Nevada, USA, by Donald E. Bently. The business started earlier as Bently Scientific in Berkeley, California (1956).
Known for	The first commercial eddy-current proximity transducers for measuring shaft vibration and position on high-speed turbomachinery
Ownership	Acquired by GE Energy in 2002; part of Baker Hughes since GE Oil & Gas combined with Baker Hughes in 2017
Rack generations	5000 series (from 1965), 3300 series (from 1988), 3500 series (from 1995), Orbit 60 (current platform)
Product families	Machinery protection racks, proximity probes and proximitors, Keyphasor sensors, velocity and acceleration transducers, 2-wire vibration transmitters, general-purpose monitors, portable analyzers, wireless sensors and System 1 condition monitoring software
Typical machines	Steam and gas turbines, centrifugal and reciprocating compressors, pumps, motors, generators, fans and gearboxes

Milestones

1956: Donald E. Bently starts Bently Scientific in Berkeley, California.
1961: The company moves to Minden, Nevada, as Bently Nevada.
1965: The 5000 series monitoring system is introduced.
1988: The 3300 series follows.
1995: The 3500 machinery protection system is launched.
2002 and 2017: GE Energy acquires Bently Nevada; it becomes part of Baker Hughes in 2017.

Bently Nevada product series

Series	Type	What it does
3500	Machinery protection rack	Continuous online protection with alarm and danger relays. Modules include the 3500/15 power supply, 3500/20 rack interface, 3500/25 Keyphasor, 3500/42M proximitor/seismic, 3500/50 tachometer, 3500/60 temperature, 3500/33 relay and 3500/92 communication gateway
3500 recip modules	Reciprocating compressor monitoring	3500/70M impulse velocity, 3500/72M rod position and 3500/77M cylinder pressure
Orbit 60	Protection and monitoring platform	The current Bently Nevada platform for protection, condition monitoring and data integration with System 1
3300 XL 8 mm	Proximity transducer system	Probe, extension cable and proximitor sensor for radial vibration, thrust position and Keyphasor reference on fluid-film bearing machines; also 5 mm and 25 mm versions
330500 Velomitor, 190501 Velomitor CT	Piezo-velocity sensors	Casing velocity on rolling-element bearing machines and low-speed cooling tower fans
990 and 991	2-wire transmitters	4-20 mA vibration (990) and thrust position (991) signals straight into a PLC or DCS, without a monitor rack
1900/65A, 2300	Compact monitors	Protection for balance-of-plant pumps, fans and motors where a full 3500 rack is not justified

A proximity probe measures the gap to the shaft, so it sees shaft movement inside a fluid-film bearing directly. A velocity or acceleration sensor sits on the casing and suits rolling-element bearing machines. Critical turbomachinery usually carries two X-Y probes per bearing, two axial probes for thrust position and a Keyphasor probe for speed and phase.

Where Bently Nevada systems are used

In Oman and the GCC, Bently Nevada racks and probes protect gas turbines, compressors and steam turbines in gas processing, LNG, refining, petrochemical, power and desalination plants. Many installations are 3500 racks that have run for years, so most requests are for like-for-like module, probe, extension cable and proximitor replacements, plus upgrades to newer monitors.

Ordering and replacement: what we need

For probes and proximitors, send the full part number with all option digits (for example 330101-00-27-10-02-05). The digits set the probe length, cable length, connector and approvals, and the probe, cable and proximitor must match in total system length. For 3500 modules, send the module and I/O part numbers from the rack and say whether the I/O is internal or external termination, or barrier type. If a module is obsolete, we quote the replacement that Bently Nevada names and point out any configuration or firmware change.

Facts checked against Baker Hughes Bently Nevada pages and published company history, October 2026.

Browse Bently Nevada products by category: Vibration.

FAQ

Questions about the Bently Nevada 87870-01 Serial Data Interface 3300

Answers from our engineering team on installation, compatibility and integration.

01What is the 87870-01?

The Bently Nevada 87870-01 is the printed wiring assembly of the 3300 System Serial Data Interface (SDI) module, which connects a 3300 rack to a host computer.

02Which system uses the 87870-01?

It is used with the 3300/03 System Monitor in a 3300 Series monitoring rack.

03What does the SDI interface do?

The SDI collects static measurement data from the monitor channels and transmits it to a host system; the DDI option handles dynamic waveform data.

04Can the 87870-01 be upgraded?

The SDI/DDI hardware upgrade kit is part number 104006-01 and the firmware upgrade kit is 104007-01.

05Where is the 87870-01 documented?

It is covered by the Bently Nevada 3300 System Serial Data Interface and Dynamic Data Interface Operation Manual.