Bently Nevada 3500 Datasheet
3500 System
Datasheet
Bently Nevada Machinery Condition Monitoring
Description
The 3500 System provides continuous, online monitoring
suitable for machinery protection applications, and is
designed to meet the requirements of the American
Petroleum Institute’s API 670 standard for such systems. The
system’s modular rack-based design includes the following
components:
l 3500/05 Instrument Rack (required)
l One or two 3500/15 Power Supplies (required)
l 3500/22M Transient Data Interface (TDI) Module
(required)
l One or more 3500/XX Monitor Modules (required)
l One or more 3500/32M (4-channel) or 3500/33 (16-
channel) Relay Modules (optional)
l One or two 3500/25 Keyphasor* Modules (optional)
l One or more 3500/92 Communication Gateway
Modules (optional)
l Input/Output (I/O) Modules (required)
l 3500/94M VGA Display (optional)
l Internal or external intrinsic safety barriers, or galvanic
isolators for hazardous area installations (optional)
l 3500 System Configuration Software (required)
162096 Rev. J
System components are described in more detail in the
following section and in their individual datasheets.
3500System
Datasheet 162096 Rev. J
System Components
This section describes the individual components that make up a complete 3500 system.
Instrument Rack
The standard 3500 Rack is available in 19” EIA rail-mount, panel-cutout-mount, and bulkhead-mount
versions.
Figure 1: 19” EIA Rail or Panel Mount Version
The rack provides slots for two Power Supplies and a TDI in the left-most rack positions that are
reserved exclusively for these modules. The remaining 14 slots in the rack can accommodate any
combination of monitor, display, relay, Keyphasor module, and communication gateway modules.
All modules plug into the rack’s backplane and consist of a main module and an associated I/O
module. The I/O module installs at the rear of the rack for panel-mount systems, and above the main
module for bulkhead-mount systems.
Standard rack depth is 349 mm (13.75 inches), while bulkhead mount rack depth is 267 mm (10.5
inches). NEMA 4 and 4X weatherproof housings are available when required for environmental
protection or when purge air is used.
Figure 2: Bulkhead Mount Version
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3500System
Datasheet 162096 Rev. J
Mini Rack
A mini rack (12” wide instead of 19”) is also available and features 7 available monitor slots instead of 14.
Like its larger counterpart, the left-most slots are reserved for the Power Supply or Supplies and TDI
Module.
The mini rack may be mounted in a panel cutout or, using an optional adapter plate, on 19” EIA
mounting rails. Bulkhead mounting is not available.
Power Supply
The 3500/15 Power Supply can be ordered for ac or dc input power, providing
compatibility with voltage sources worldwide. Line noise filters are standard. The 3500
Rack can operate from a single supply, or dual supplies can be used to provide
redundancy for situations that cannot tolerate power interruption.
Dual supplies reside in the upper and lower positions of the left-most rack slot.
Redundant supplies can use separate voltage sources. For example, the primary (lower)
supply can operate with 120 Vac power while the backup (upper) supply can be
powered from an uninterruptible 24 Vdc source.
Each supply can individually provide power to the entire rack and its modules. When
redundant supplies are used, the lower supply acts as primary power for the rack while
the upper supply acts as a backup, ready to instantly and automatically operate as the
primary rack supply without interrupting rack functions should the primary supply fail.
The 3500/15 Power Supply module has self-monitoring functions that allow it to determine if all its
output voltages are within specifications. The module annunciates this via a green Supply OK LED on
the power supply’s front panel.
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3500System
Datasheet 162096 Rev. J
Transient Data Interface (TDI)
The TDI is the 3500 Rack’s primary interface to the configuration, display, and condition
monitoring software. Each rack requires one TDI, located in the rack slot immediately
adjacent to the power supply slot.
The TDI supports a proprietary protocol used by the 3500 Configuration Software to
configure the rack and the 3500 Operator Display Software to retrieve rack data and
statuses.
The TDI also provides a direct interface with System 1* Condition Monitoring and Diagnostic
software without the need for an external communications processor.
The Rack OK relay is located within the TDI’s I/O module. It is driven by NOT OK conditions
within the TDI itself and within other modules in the rack.
Dozens of possible events within the rack can drive the Rack OK relay to NOT OK
condition. For this reason, the Rack OK relay it is not intended for use as part of a
machinery auto-shutdown circuit. It should be used for general annunciation
purposes only.
The TDI supports self-monitoring functions both for itself and for the rack, in addition to
those provided by the individual monitor, relay, communications, and other modules.
While the TDI provides certain functions common to the entire rack, it is not part of the
critical monitoring path and its machinery protection functions.
The TDI has four front-panel LEDs that provide the following indications:
OK Indicates that the TDI Module and its I/O Module are operating correctly.
TX/RX
TM Indicates when the rack is in the Trip Multiply mode.
CONFIG OK
Flashes at the rate that communications between the TDI and other rack modules are
occurring.
Indicates that any module in the rack is not configured or has a configuration error;
that the stored configuration of the TDI does not match the physical configuration of
the rack; or that a security option condition was not met.
System configuration is secured by means of a keylock switch on the front of the TDI and two levels of
software password protection, preventing unauthorized changes to or tampering with the
configuration settings.
The TDI can be connected to a portable computer via a front-panel USB communications port for
local changes to configuration. The TDI provides permanent system connectivity via Ethernet ports. It
also provides a front-panel DIP switch for assigning a unique rack address when multiple 3500 racks
are networked with one another.
The TDI has a system reset switch on the front panel for clearing any latched alarms in the system as
well as latched NOT OK conditions. The I/O module provides a set of rear-panel connections, which
facilitate remote activation of the System Reset, Trip Multiply and Rack Alarm Inhibit functions.
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3500System
Datasheet 162096 Rev. J
Monitor Modules
Each monitor occupies a single slot out of 14 available in the rack. Monitors are
microprocessor-based and offer digitally adjustable Alert and Danger setpoints for each
channel. Alarms can be configured for either latching or non-latching operation.
Status indications for each monitor are provided by front-panel LEDs, allowing
observation without operator interaction for convenient operation.
Most monitors provide independent 4 to 20 mA proportional outputs for each channel of
the I/O module for connection to associated industrial systems.
Where applicable, the I/O modules provide transducers with appropriate power via shortcircuit-protected terminals. OK detection routines within each monitor continuously
check the integrity of each transducer and associated field wiring.
Transducer input signals are buffered and sent to front-panel BNC connectors for all
monitors except the 3500/60, /61, /65 (temperature) and /62 (process variable) monitors.
In addition to the direct measurement made by the monitor, many channel types
provide an enhanced data set consisting of a variety of measured variables that
depend on the monitor type and its configuration. For example, radial vibration
channels include the basic overall (direct) vibration amplitude as well as gap
voltage, 1X filtered amplitude, 1X filtered phase, 2X filtered amplitude, 2X filtered
phase, Not 1X amplitude, and Smax.
These additional measured variables are provided for each channel, and ALERT alarm
setpoints can be established on each variable, as needed. DANGER alarm setpoints can
be established on any measured variable value returned from each channel.
3500 Series Monitor Modules
Monitor
Type
3500
/40M
3500
/42M
3500
/44M
Channel Types (footnotes)
l Radial Vibration
l Axial (Thrust) Position
l Eccentricity
l Differential Expansion (1)
Same as 3500/40M, with the following additional channel
types:
l Acceleration (4)
l Velocity (4)
l Acceleration2 (4)
l Velocity2 (4)
l Circular Acceptance Region (5)
l Shaft Absolute
l Aeroderivative
l Aeroderivative2
Number of Channels
(footnotes)
Four (2, 3)
Four (2, 3)
Four
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3500System
Datasheet 162096 Rev. J
l Axial (Thrust) Position
l Differential Expansion
l Standard Single Ramp Differential Expansion
3500
/45
3500
46M
3500
/50M
3500
/60 & /61
3500
/62
3500
/64M
3500
/70M
3500
/72M
l Non-Standard Single Ramp Differential Expansion
l Dual Ramp Differential Expansion
l Complementary Differential Expansion
l Case Expansion9
l Valve Position
l Hydro Radial Vibration (7)
l Hydro Stator-Mounted Air Gap
l Hydro Acceleration
l Hydro Thrust
l Hydro Velocity
l Stator End Winding
l Multimode Functionality
l Rotor Speed
l Rotor Acceleration
l Zero-Speed
l Reverse Rotation
l Rotor Acceleration2
l Zero Speed2
l Reverse Rotation2
l Temperature
l Differential Temperature
l Process Variables
l Dynamic Pressure
l Impulse Accel
l Acceleration2
l Recip Velocity
l Low Frequency Recip Velocity
l Reciprocating Compressor Rod Drop / Rod Position /
Hyper compressor
Reciprocating Compressor Cylinder Pressure, including:
Four (3)
Four (3)
Two (8, 9)
Six (10)
Six (10, 11)
Four (12)
Four
Four (3)
3500
/77M
l Suction Pressure
l Maximum Pressure
l Minimum Pressure
l Compression Ratio
l Peak Rod Compression
l Peak Rod Tension
l Degree of Rod Reversal
Four
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3500System
Datasheet 162096 Rev. J
Motor Stator Insulation Monitor
3500
/82
l Leakage Current (each phase)
l Line Voltage (each phase)
l Temperature (up to three channels)
Nine
Monitor Module Footnotes
1. Only standard differential expansion capabilities provided. For ramp differential expansion and
complementary input differential expansion, use the 3500/45 Position Monitor, instead.
2. The 3500/42M provides individual 4 to 20 mA proportional outputs for each channel. The
3500/40M does NOT provide 4 to 20 mA outputs.
3. The monitor channels are programmed in pairs and can perform up to two of these functions at
a time. Channels 1 and 2 can perform one function, while channels 3 and 4 perform another (or
the same) function.
4. Channels configured for velocity or acceleration provide only direct amplitude. Channels
configured for Velocity II or Acceleration II provide 1X amplitude/phase and 2X amplitude/phase
and bias voltage in addition to direct amplitude.
5. Any vibration channel can be configured for conventional “pie-shaped” acceptance region
alarms. When configured for circular acceptance regions, circular (rather than pie-shaped)
acceptance region alarms can be enabled. Refer to the 3500/42M Operations/Maintenance
Manual for additional information, or contact your nearest sales professional.
6. Only channels 3 and 4 can be used for Case Expansion measurements.
7. The 3500/46M provides frequency response characteristics suitable for use on machines with
very slow rotational speeds, such as hydraulic turbine/generator sets, which often operate at
speeds of 100 RPM or lower. Also, special signal conditioning and tracking filtering is provided,
allowing detection of rough load zone operation, shear pin failure, and other hydro-specific
conditions.
8. The 3500/50M is not intended for use in overspeed protection applications. Use the 3701/55
Emergency Shutdown (ESD) system, instead.
9. Both Zero Speed and Reverse Rotation channel types require both channels of the 3500/50
module, making it a single-channel monitor when used in these configurations.
10. The 3500/60 and 3500/61 provide identical functions except the 3500/60 does not provide 4 to 20
mA proportional outputs. When these outputs are required, use the 3500/61.
11. The 3500/62 is designed to accept static proportional signals such as 4 to 20 mA, 1 to 5 Vdc, or
any static proportional voltage signal between –10 and +10 Vdc. When dynamic signals (i.e.,
those where waveform information is required) are used, a 3500/40M or 3500/42M can often be
programmed as a custom channel type, making the 3500 system compatible with virtually any
static or dynamic signal from pressure, level, temperature, vibration, flow, position, speed, or
other transducers. Consult the factory or your local Bently Nevada sales professional for more
information.
12. The 3500/64M is primarily intended for monitoring combustor pressure pulsation instabilities
(“humming”) in gas turbines.
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