3500/65 16-Channel Temperature
MonitorDatasheet

Bently Nevada Machinery Condition Monitoring

172930 Rev. M

Description
The 3500/65 monitor provides 16 channels of temperaturemonitoring and accepts both resistance temperaturedetector (RTD) and isolated tip thermocouple (TC)temperature inputs. The monitor conditions these inputs andcompares them against user-programmable alarm
setpoints.
The monitor is programmed using the 3500 Rack
Configuration Software. You can configure the 16-Channel
Temperature Monitor to accept isolated tip thermocouples,
3-wire RTD, 4-wire RTD, or a combination of TC and RTD inputs.
In Triple Modular Redundant (TMR) configurations, you must
install temperature monitors in groups of 3 adjacentmonitors. In this configuration the monitor uses 2 types ofvoting to ensure accurate operation and to avoid singlepoint failures.

3500/65 16-Channel Temperature Monitor
Datasheet

172930 Rev. M

Platinum RTDs with α = 0.00385 are
the worldwide industrial standard
and are the recommended RTDs for
all applications.

Specifications
Inputs

Outputs

Power3 watts nominal
Consumption
Signal

Accepts from 1 to 16 RTD or
isolated tip TC transducer
signals.

Input
Impedance

Greater than 1 MΩ for eachlead input.

Front Panel LEDs
OK LED

Indicates when the 3500/65 isoperating properly.

TX/RX LED

Indicates when the 3500/65 iscommunicating with othermodules in the 3500 rack.

Bypass LED

Indicates when the 3500/65
monitor is in Bypass Mode.

RTD
CurrentSourceValue

913 ± 7 µA @ 25°C per transducer(1 supply for the 4-wire RTD and2 supplies for the 3-wire).

Transducers
TCs
Type E-100°C to +1000°C,(-148°F to +1832°F)

Type J

0°C to +760 °C(32°F to +1400 °F)

Type K

0°C to +1370°C(32°F to +2498°F)

Type T-160°C to +400°C,( -256°F to +752°F)

Signal Conditioning
Specified at +25°C (+77° F). Full-scale
range for each channel is set in thefield via 3500 Configuration Software.
No calibration is required

RTDs
100 Ω 3-wire and -200°C to +850°C
4-wire platinum (-328°F to +1562°F)
RTD (α =0.00385)
100 Ω 3-wire and -200°C to +700°C
4-wire platinum (-328°F to +1292°F)
RTD (α =0.00392)

RTDs and TCs
ResolutionAccuracy
Internal
Bulkhead Rack: ±3°C at +25°CTermination (±5.4°F at +77°F).
Standard Rack: ±3°C at +25°C(±5.4°F at +77°F).

120 Ω 3-wire and -80°C to +260°C(-112°F to +500°F)
4-wire nickel
RTD
10 Ω 3-wire and4-wire copper
RTD

1°C or 1 °F.

Bulkhead Rack: ±3°C at +25°C
External
Termination (±5.4°F at +77°F)-100°C to +260°C,(-148°F to +500°F)

Standard Rack: ±3°C at +25°C(±5.4°F at +77°F)
Cold Junction Compensation
Sensor (used for TCmeasurements) ±2°C at +25°C(±3.6°F at +77°F).

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3500/65 16-Channel Temperature Monitor
Datasheet

172930 Rev. M

Proportional Values

AlarmsAlarmSetpoints

Proportional values are temperature
measurements used to monitor the machine.
The 16-channel temperature monitor returns
temperature proportional values.

You can use software
configuration to set Alert andDanger setpoints for the value
measured by the monitor. Alarms
are adjustable from 0 to 100% of
full-scale for each measuredvalue. The exception is when thefull-scale range exceeds the rangeof the sensor. In this case,software will limit the setpoint tothe range of the sensor. Accuracyof alarms are to within 0.13% of thedesired value. The 3500/65 16channel temperature monitor has
both under- and over-alarm
setpoints.

Alarm
TimeDelays

You can use software to program
alarm delays as follows:

Alert
Delay

From 1 to 60 seconds in 1-secondincrements.

DangerDelay

From 1 to 60 seconds in 0.5second increments.

Environmental Limits
Operating-30°C to +65°C (-22°F toTemperature: +150°F)
Storage-40°C to +85°C (-40°F toTemperature: +185°F)

PhysicalMain ModuleDimensions(Height x241.3 mm x 24.4 mm x 241.8 mm
Width x(9.50 in x 0.96 in x 9.52 in)Depth)
Weight0.91 kg (2.0 lbs.).

I/O Modules
Dimensions(Height x241.3 mm x 24.4 mm x 99.1 mm
Width x(9.50 in x 0.96 in x 3.90 in)
Depth)
Weight0.45kg (1.0 lb.).

Rack Space Requirements
MainModule

1 full-height front slot

I/O Modules 1 full-height rear slot

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3500/65 16-Channel Temperature Monitor
Datasheet

172930 Rev. M

Hazardous Area Approvals
Compliance andCertifications

For the detailed listing of country andproduct specific approvals, refer tothe 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:ll

CSA/NRTL/C
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;This 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.

ATEX/IECEx

EMC

II 3 G

European Community Directive:

Ex nA nC ic IIC T4 Gc
Ex ec nC ic IIC T4 Gc

EMC Directive 2014/30/EU
Standards:

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

EN 61000-6-2 Immunity for
Industrial Environments
EN 61000-6-4 Emissions for
Industrial Environments

Electrical Safety
European Community Directive:
LV Directive 2014/35/EU
Standards:
EN 61010-1

RoHS
European Community Directive:
RoHS Directive 2011/65/EU

Maritime
ABS - Marine and Offshore Applications
DNV GL Rules for Classification – Ships,Offshore Units, and High Speed and Light
Craft

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3500/65 16-Channel Temperature Monitor
Datasheet

172930 Rev. M

Ordering Considerations

Ordering Information

If you add the 3500/65 to an existing 3500
System your system will require the following orlater firmware and software versions:
3500/22 Module Firmware

Revision 1.50

3500/01 Software

Version 3.85

3500/02 Software

Not supported*

3500/03 Software

Not supported*

3500/93 Module Firmware

Revision 2.02

System 1 Software

Revision 5.2
with ServicePack 2 or later

For the detailed listing of country andproduct specific approvals, refer tothe Approvals Quick Reference Guide(108M1756) available from Bently.com.

3500/65-AA-BB
A: I/O Module Type

*Attempting to use the 3500/65 with
3500/02 or 3500/03 software may
prevent proper operation of thesoftware.

01

RTD/Isolated Tip TC with Internal
Terminations

02

RTD/Isolated Tip TC with ExternalTerminations

B: Agency Approval Option

You cannot use external termination blocks
with internal termination I/O modules.

00

None01

CSA/NRTL/C02

CSA/ATEX
Agency Approval Option B 02 is onlyavailable with Ordering Option A 01.

When ordering I/O Modules with externalterminations, you must order the externaltermination blocks and cables separately.
When ordering I/O Modules for use with 4-Wire
RTDs, order with Modification 179952-01. For
further information, see the 3500/65 User Guide.

External Termination BlockThis will result in an I/O Module
Mismatch and 562 ADC Failure in theSystem Event List.

172115-01

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RTD/Isolated Tip TC External
Termination Block (Euro Styleconnectors).

3500/65 16-Channel Temperature Monitor
Datasheet

172930 Rev. MCables
3500/65 Transducer (XDCR) Signal toExternal Termination (ET) Block CableSpares

134544-AAAA-BB

Part
NumberDescription

A: Cable Length

172931

3500/65 User Guide

0005

5 feet (1.5 metres)

145988-02

3500/65 Monitor

0007

7 feet (2.1 metres)

172103-01

0010

10 feet (3 metres)

3500/65 RTD/Isolated Tip TC I/OModule, Internal Terminations

0025

25 feet (7.5 metres)

1730050050

50 feet (15 metres)

Connector Header, Internal
Termination, 20-position, Black0100

100 feet (30.5 metres)

172109-01

3500/65 RTD/ Isolated Tip TC I/OModule, External Terminations

172115-01

RTD/Isolated Tip TC External
Termination Block (Euro StyleConnectors) Specifications

B: Assembly Instructions
01

Not Assembled

02

Assembled

When replacing an older I/O modulewith a newer one,172109-01 Rev D,172103-01 Rev F, 172115-01 Rev E, orfuture revisions; it is necessary toupgrade the firmware to the monitor
with the latest released version. You
must remove the I/O module before
upgrading the monitor to the latest
firmware. Failure to do this will result in
an I/O Module Mismatch and 562 ADC
Failure in the System Event List.

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3500/65 16-Channel Temperature Monitor
Datasheet

172930 Rev. M

Graphs and Figures

1.
2.
3.
4.

Status LEDs.
3500/65 16 Channel Temperature Monitor
16 CH RTD/TC w Internal Term (172103-01)
16 CH RTD/TC w External Term (172109-01)

Figure 1: Front and rear views of the 3500/65 16 Channel Temperature Monitor

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3500/65 16-Channel Temperature Monitor
Datasheet

172930 Rev. M

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Phone: 1.775.782.3611 (US) or Bently.com/support
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