3500/64M Dynamic Pressure Monitor
Datasheet

Bently Nevada Machinery Condition Monitoring141536 Rev. PDescription
The 3500/64M Dynamic Pressure Monitor is a single slot, fourchannel monitor that accepts input from high temperaturepressure transducers and uses this input to drive alarms. The
monitor’s one measured variable per channel is bandpass
dynamic pressure.
You can use the 3500 Rack Configuration Software toconfigure the bandpass corner frequencies along with anadditional notch filter. The monitor provides a recorder output
for control system applications.
The primary purpose of the 3500/64M Dynamic Pressure
Monitor is to provide the following:llMachinery protection by continuously comparing
monitored parameters against configured alarm
setpoints to drive alarms
Essential machine information for operations andmaintenance personnel

Each channel, depending on configuration, conditions its
input signal to generate various parameters calledmeasured variables. You can configure alert and danger
setpoints for each active measured variable.

3500/64M Dynamic Pressure Monitor
Datasheet141536 Rev. P

2 wireSpecifications+4 to +20 mA
Values are proportional tomonitor full-scale.

Inputs
Accepts from 1 to 4 pressuretransducer signals

SignalRecorderoutputs

Input Impedance
3 wiretransducer

10 kΩ

2 wire1.5 MΩ to 3.5 MΩ typicalVoltage
Compliance(currentoutput)

100 mV/psi (1.45 mV/mBar)

Outputs
Resolution

Front Panel LEDs
OK LED

Indicates when the 3500/64M
Dynamic Pressure Monitor isoperating properly.

TX/RX LED

Indicates when the 3500/64M
is communicating with othermodules in the 3500 rack.

Bypass LED

Indicates when the 3500/64M
is in Bypass Mode.

0.3662 µA per bit±0.25% error at room
temperature-0.66 to +0.70% error overtemperature range

Dynamic Pressure - Direct Filter
5 Hz to 4 KHz
Low modeHigh mode

Each connector is short-circuit
protected.

If no LP filter is chosen, therange extends toapproximately 5.285 KHz
10 Hz to 14.75 KHz
Fixed low pass

Low and high filtering modes are options for achannel pair. Channels 1 and 2 form a pair, andchannels 3 and 4 are the other pair. You may
select different band pass options on eachchannel of a channel pair. However, thechannels within the pair must operate in thesame filtering mode.

The Cascade Mode does notcascade the bufferedtransducer outputs.
550 Ω

You can set up the signal processing so thatthe monitor feeds only the channel 1 input to all
four channels. This feature is called Cascade

Transducer Supplies
3 wireLoad resistance is 0 to 600 Ω.

Signal Conditioning

The front of each monitor has
one coaxial connector foreach channel.

OutputImpedance

0 to +12 Vdc range across load

Update rate approximately
100 ms or lessBuffered Transducer

Outputs

The monitor provides
individual recorder values foreach channel.
Monitor operation isunaffected by short circuits onrecorder outputs.

Sensitivity
Dynamicpressure

3.3 mA current source @ 22
Vdc (nominal)-24 Vdc

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3500/64M Dynamic Pressure Monitor
Datasheet141536 Rev. P

Measured Variables

Mode and is denoted as 1 >ALL in the 3500 Rack
Configuration Software.

DynamicThe primary value for eachpressure direct channel

In Cascade Mode, you can select filter mode
options for a channel pair only. One transducer
provides input to four channels for different
filtering requirements. As a result, you canconfigure four separate bandpass filter optionsand four separate full-scale ranges with one
transducer input.

PhysicalMonitor Module (Main Board)

The two modes of filtering provide different
qualities of filtering.

Dimensions(Height x Width xDepth)

241.3 mm x 24.4 mm x241.8 mm
(9.50 in x 0.96 in x 9.52 in)

Low Mode

Weight0.82 kg (1.8 lb)

I/O Modules (non-barrier)Filter Quality
High pass

10-pole (200dB per decade,60 dB per octave)

Dimensions(Height x Width xDepth)

241.3 mm x 24.4 mm x 99.1mm(9.50 in x 0.96 in x 3.90 in)

Low pass (LP)10-pole (200dB per decade,60 dB per octave)

Weight0.20 kg (0.44 lb)

Fixed low passLP = none

I/O Modules (with barrier)-78 dB minimum attenuationin the stop band.

High Mode
Filter Quality
High pass
Low pass

6-pole (120 dB per decade,36 dB per octave)-65 dB minimum
attenuation in the stop bandLine rejection(notch) filter

The line rejection filter has
two settings, 50 or 60 Hz.
Filter response and center
frequency selections arevalid for both settings.
-0.175 dB (98%) of Full Scaleat Center Frequency of +2 Hzand aboveFilter quality
response-0.175 dB (98%) of Full Scaleat Center Frequency of –2 Hzand below-35 dB (1.8%) of Full Scalefrom –0.5 Hz of Center
Frequency to +0.5 Hz ofCenter Frequency

3/10Dimensions(Height x Width xDepth)

241.3 mm x 24.4 mm x
163.1 mm
(9.50 in x 0.96 in x 6.42 in)Weight0.46 kg (1.01 lb)

3500/64M Dynamic Pressure Monitor
Datasheet141536 Rev. P

AlarmsUse the 3500 Rack
Configuration Software toset alert and danger levels
for the direct values
measured by the monitor.
Alarm
Setpoints

Accuracy ofalarm
setpoints

Alarms are adjustable from0 to 100% of full-scale foreach measured value.
However, when the full-scale
range exceeds the range ofthe transducer, the range ofthe transducer will limit thesetpoint.
Within 0.13% of the desired
value

Alarm Time Delays
You can program alarm delays using the 3500
Rack Configuration Software from one to 60
seconds in one second intervals.
Alert

From one to 60 seconds in
one second intervals

Danger

0.1 seconds or from one to 60
seconds in 0.1 secondintervals

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3500/64M Dynamic Pressure MonitorDatasheet

141536 Rev. P

Hazardous Area Approvals

Compliance and Certifications

For the detailed listing of country and productspecific approvals, refer to the Approvals Quick
Reference Guide (108M1756) available from
Bently.com.

FCC
This device complies with part 15 of theFCC Rules. Operation is subject to thefollowing two conditions:
llcNRTLus
When used with I/Omodule ordering
options without
internal barriersThis device may not cause harmfulinterference.
This device must accept any
interference received, includinginterference that may cause
undesired operation.

T4 @ Ta= -20˚C to +65˚C (-4˚F to+149˚F)
When installed per drawing
149243 or 149244.

EMC
European Community Directive:

When used with I/Omodule ordering
options withinternal barriers

EMC Directive 2014/30/EU
Standards:
EN 61000-6-2; Immunity for
Industrial Environments
EN 61000-6-4; Emissions for
Industrial Environments

ATEX/IECEx

European Community Directive:

When used with I/Omodule ordering
options without
internal barriers

LV Directive 2014/35/EU
Standards:
EN 61010-1

RoHS

II 3 GEx nA nC ic IIC T4 Gc;
Ex ec nC ic IIC T4 Gc;
T4 @ Ta= -20˚C to +65˚C (-4˚F to+149˚F)
When installed per drawing
149243 or 149244.

European Community Directive:
RoHS Directive 2011/65/EU

When used with I/Omodule ordering
options withinternal barriers

Maritime
DNV GL rules for classification – Ships,
offshore units, and high speed and lightcraft
ABS Rules for Condition of Classification,
Part 1lClass I, Zone 2: AEx/Ex nA nC ic[ia Ga] IIC T4 Gc;
Class I, Zone 2: AEx/Ex ec nC ic [iaGa] IIC T4 Gc;
Class I, Division 2, Groups A, B, C,and D (W/ IS Output for Division1)
T4 @ Ta= -20˚C to +65˚C (-4˚F to+149˚F)
When installed per drawing
138547.

Electrical Safetyl

Class I, Zone 2: AEx/Ex nA nC ic IIC
T4 Gc;Class I, Zone 2: AEx/Ex ec nC ic IIC
T4 Gc;Class I, Division 2, Groups A, B, C,and D;

Steel Vessels Rules
Offshore Units and Structures

5/10

II 3(1) G
Ex nA nC ic [ia Ga] IIC T4 Gc;
Ex ec nC ic [ia Ga] IIC T4 Gc;
T4 @ Ta= -20˚C to +65˚C (-4˚F to+149˚F)
When installed per drawing
138547.

3500/64M Dynamic Pressure Monitor
Datasheet141536 Rev. P

CablesOrdering
Information

3500 Dynamic Pressure Signal toExternal Termination Block Cable
129525 - AAAA-BB
A: I/O Cable Length

For the detailed listing of country and productspecific approvals, refer to the Approvals Quick
Reference Guide (108M1756) available from
Bently.com.

0005

5 feet (1.5 metres)

0007

7 feet (2.1 metres)

Dynamic Pressure Module
3500/64 - AA - BB

0010

10 feet (3.0 metres)

0025

25 feet (7.6 metres)

A: I/O Module Type0050

50 feet (15.2 metres)
100 feet (30.5 metres)01

I/O Module with Internal
Termination

0100

02

I/O Module with External
Termination

01

Not assembled

B: Agency Approval02

Assembled00

None01cNRTLus (Class I, Division 2)

3500 Recorder Output to External
Termination Block Cable

02

ATEX / IECEx / CSA (Class I, Zone 2)129529-AAAA-BB

B: Assembly Instructions

External Termination (ET)BlocksPart Number

A: I/O Cable Length

Description0005

5 feet (1.5 metres)

0007

7 feet (2.1 metres)0010

10 feet (3.0 metres)

0025

25 feet (7.6 metres)

128015-09

Dynamic Pressure ET Block
Terminal Strip connectors125808-09

Dynamic Pressure ET BlockEuro Style connectors

0050

50 feet (15.2 metres)

0100

100 feet (30.5 metres)

128710-01

Recorder Out ET Block
Terminal Strip connectors

B: Assembly Instructions

128702-01

Recorder Out ET BlockEuro Style connectors

6/1001

Not assembled

02

Assembled

3500/64M Dynamic Pressure Monitor
Datasheet141536 Rev. P

SparesPart Number

Description

176449-05

3500/64M Dynamic
Pressure Monitor

140471-02

I/O Module
Internal Termination

140482-02

I/O Module
External Termination

143729-01

Cylinder Pressure I/OInternal Termination

04425545

Grounding wrist strap04400037

IC Removal Tool

00580434

Connector Header
Internal Termination
8 position, Green00580436

Connector Header
Internal Termination
6 position
Green00502133

Connector Header
Internal Termination
12 position
Blue

166M2389

Connector Header
Push-in-Spring Type
(Alternative for PN00580434)

166M2388

Connector Header
Push-in-Spring Type
(Alternative for PN00580432)

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3500/64M Dynamic Pressure Monitor
Datasheet141536 Rev. P

Graphs and Figures

1.
2.
3.
4.

Status LEDs
Buffered Transducer Outputs
I/O Module with Internal Terminations
I/O Module with External Terminations

Figure 1: Front and Rear Views of 3500/64M Dynamic Pressure Monitor

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3500/64M Dynamic Pressure Monitor
Datasheet141536 Rev. P

Figure 2: Side View of I/O Modules for 3500/64MThe I/O modules with internal or external terminations have the same jumpers.

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3500/64M Dynamic Pressure Monitor
Datasheet141536 Rev. P

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