Brand: Bently Nevada

3500/60 Temperature Monitor

Name: Bently Nevada 3500/60 Temperature Monitor – Datasheet
Brand: Bently Nevada

Description

Overview

The Bently Nevada 3500/60 Temperature Monitor is a six-channel monitor module for the Bently Nevada (Baker Hughes) 3500 Series machinery protection system. It accepts RTD and thermocouple inputs, conditions the signals and compares each measured temperature against user-programmable Alert and Danger setpoints, which the rack uses for alarm and shutdown logic.

The 3500/60 and 3500/61 provide identical functionality, except that the 3500/61 adds a 4–20 mA recorder output for each channel. Measurement type, full-scale range and alarms are set with the 3500 Rack Configuration Software, and the module works alongside other rack modules such as the 3500/22M TDI, 3500/40M Proximitor Monitor and 3500/15 power supply.

Key Features

Six channels of RTD or thermocouple temperature monitoring per module
Non-isolated RTD/TC I/O accepts TC, RTD or a mixture of both; isolated TC I/O provides 250 Vdc channel-to-channel isolation
Alert and Danger setpoints, both over and under, adjustable from 0 to 100 % of full scale
Programmable alarm time delays
Triple Modular Redundant (TMR) operation with three adjacent monitors
Class I Div 2 and ATEX/IECEx Zone 2 approval options

Technical Specifications

Parameter	Value
Part number	3500/60-AA-BB (AA = I/O module type, BB = agency approval option)
Channels	1 to 6 RTD or TC inputs
Thermocouples	Type E, J, K, T
RTDs	100 Ω platinum (α = 0.00385 or 0.00392), 120 Ω nickel, 10 Ω copper; 3-wire and 4-wire
Input impedance	10 MΩ per lead input
Isolated I/O module	500 Vdc system isolation; 250 Vdc channel-to-channel
Recorder outputs	None (available on 3500/61)
Alarm setpoint accuracy	Within 0.13 % of desired value
Alarm delays	Alert 1–60 s in 1 s steps; Danger 1–60 s in 0.5 s steps
Power consumption	7 W nominal
Operating temperature	-30 to +65 °C (internal/external termination I/O); 0 to +65 °C (internal barrier I/O)
Storage temperature	-40 to +85 °C
Monitor dimensions (H x W x D)	241.3 x 24.4 x 241.8 mm
Monitor weight	0.91 kg
Rack space	1 full-height front slot (monitor), 1 full-height rear slot (I/O)
I/O module options (AA)	01/02 RTD/TC non-isolated internal/external terminations; 03/04 TC isolated internal/external terminations; 05 RTD/TC non-isolated with internal barriers
Approval options (BB)	00 none; 01 CSA/NRTL/C Class 1 Div 2; 02 ATEX/IECEx/CSA Class 1 Zone 2
Resolution	1 °C or 1 °F
RTD current source	925 ±15 µA at 25 °C per transducer
Cold junction compensation sensor accuracy	±1 °C at 25 °C
Accuracy, non-isolated I/O with internal termination	±3 °C at 25 °C
I/O module dimensions (H x W x D) / weight	241.3 mm × 24.4 mm × 99.1 mm, 0.45 kg; internal barrier: 241.3 × 24.4 × 163.1 mm, 0.46 kg
Hazardous area marking	Class I Division 2 Groups A, B, C, D; Class I Zone 2; ATEX/IECEx II 3 G (II 3(1) G with internal barriers); T4 at Ta = -20 °C to +65 °C

Applications

Bearing, thrust bearing and casing temperature protection on steam and gas turbines
Temperature monitoring of centrifugal and reciprocating compressors, large pumps, motors and generators
Lube oil and seal temperature points on critical rotating equipment in oil & gas, petrochemical and power plants
Expansion or replacement of modules in existing 3500 racks

3500/60 Spare Part Numbers and Termination Hardware

The monitor without recorder outputs is ordered as 3500/60-AA-BB, and the 3500/61 follows the same structure while adding a 4 to 20 mA recorder output per channel. The spare main board is 163179-01 (3500/60 Temperature Monitor, without recorders). The 3500/60 rear modules are 133819-01 (RTD/TC Non-Isolated I/O Module, Internal Terminations), 133827-01 (RTD/TC Non-Isolated I/O Module, External Terminations), 133835-01 (TC Isolated I/O Module, Internal Terminations), 133843-01 (TC Isolated I/O Module, External Terminations) and 136711-01 (RTD/TC I/O Module with Internal Barriers and Internal Terminations, not isolated). The 3500/61 equivalents carry the -02 suffix, starting with monitor 163179-02.

External termination blocks are ordered separately: 133908-01 (RTD/TC Non-Isolated, Terminal Strip connectors), 133916-01 (RTD/TC Non-Isolated, Euro Style connectors), 133924-01 (TC Isolated, Terminal Strip connectors) and 133932-01 (TC Isolated, Euro Style connectors). The transducer signal cable to the block is 134544-AAAA-BB in lengths of 0005, 0007, 0010, 0025, 0050 or 0100 feet, with BB set to 01 for not assembled or 02 for assembled. Internal-termination connector headers are 00580442 (9-position), 00580443 (12-position, green), 00502133 (12-position, blue) and 00580444 (15-position).

3500/60 Sensor Ranges, Isolation and Configuration Notes

Sensor type and full-scale range are set per channel in 3500 Rack Configuration Software, and Bently Nevada states that no calibration is required. The non-isolated RTD/TC I/O module can take thermocouples, RTDs or a mixture of both on the same module, while the isolated module is for thermocouples only and provides 250 Vdc between channels. The manufacturer recommends platinum RTDs with an alpha of 0.00385 for all applications. Where external barriers are used, the lower end of every RTD range is limited to -50 °C.

One restriction deserves attention with Type E thermocouples on the isolated I/O modules (options 03 and 04). If the rack runs in an ambient temperature above +35 °C, the usable range narrows to -60 °C to +1000 °C. The configuration software still accepts a setting down to -100 °C, but the system will not work properly in that condition, so it should not be configured that way. Alarm setpoints exist for both over and under conditions, and where the configured full scale is wider than the sensor range, the sensor range limits the setpoint.

Why Seven Star LLC

Seven Star LLC supplies Bently Nevada 3500 Series modules across Oman and the GCC. Before quoting, we check the full order code, I/O module type and approval option against your rack configuration and sensor list so that the monitor and I/O module match the existing system.

Request a Quote for 3500/60 Temperature Monitor

Send your request through our inquiry form with the full part number (3500/60-AA-BB), quantity, sensor types (TC type or RTD element), whether isolation or internal barriers are required, and your rack slot map. Seven Star LLC will confirm compatibility with your 3500 system and quote availability and lead time.

Other Models in the Bently Nevada 3500 Machinery Protection System Range

Seven Star LLC supplies models from the Bently Nevada 3500 Machinery Protection System range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.

Model	Category
Bently Nevada 3500 Machinery Protection System	Vibration Monitoring	View details
3500/15 AC/DC Power Supply Module	Vibration Monitoring	View details
3500/25 Keyphasor® Module	Vibration Monitoring	View details
3500/22M Transient Data Interface (TDI)	Vibration Monitoring	View details
Bently Nevada 3500/33 16-Channel Failsafe Relay Output Module – 149992-02	Vibration Monitoring	View details
Bently Nevada 3500/32M 4-Channel Relay Module	Vibration Monitoring	View details
3500/40M Proximitor® Monitor	Vibration Monitoring	View details
Bently Nevada 3500/42M Proximitor Seismic Monitor	Vibration Monitoring	View details
Bently Nevada 3500/45 Position I/O Module – 135137-01	Vibration Monitoring	View details
Bently Nevada 3500/50 Tachometer Module	Vibration Monitoring	View details
3500/60 Temperature Monitor	Vibration Monitoring	You are viewing this model
Bently Nevada 3500/60-01-00 Temperature Monitor Module	Vibration Monitoring	View details

Datasheets & Documents

Datasheet Bently Nevada 3500/60 and 3500/61 Temperature Monitor Datasheet Download

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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 3500/60 Temperature Monitor

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

01Q1: Which sensors are supported?

RTDs (e.g., Pt100) and common thermocouples (K/J/E/T…). We’ll confirm per your sensor list.

02Q2: Does it provide protection alarms?

Yes—Alert/Danger with delays/latching feed the rack’s relay logic for trips/interlocks.

03Q3: Can I trend data in System 1?

Yes—temperature values are logged/trended in System 1, enabling correlation with vibration.

04Q4: RTD wiring recommendation?

Use 3-wire or 4-wire RTD wiring for better accuracy and lead compensation.

05Q5: Is the module hot-swappable?

Yes—per site procedures, the 3500/60 can be replaced without powering down the rack.