Products Description

The Bently Nevada 3500/45 Position Monitor is a 4-channel instrument that accepts input from proximity transducers, Rotary Position Transducers (RPTs), DC Linear Variable Differential Transformers (DC LVDTs), AC Linear Variable Differential Transformers (AC LVDTs), and rotary potentiometers. The monitor conditions the input and compares the conditioned signals with user-programmable alarms.

You can program each channel using the 3500 Rack Configuration Software to perform the following functions:

Axial (thrust) Position

Differential Expansion

Standard Single Ramp Differential Expansion

Non-standard Single Ramp Differential Expansion

Dual Ramp Differential Expansion

Complementary Differential Expansion

Case Expansion

Valve Position

The primary purpose of the 3500/45 Position Monitor is to provide the following:

Machinery protection by continuously comparing monitored parameters against configured alarm setpoints to drive alarms

Essential machine information for operations and maintenance personnel

Each channel, depending on configuration, typically conditions its input signal to generate various parameters called measured variables. You can establish alert setpoints for each active measured variable and danger setpoints for any two of the active measured variables.

Contact Us to Get the Best Price

Sales Person	Felicia
Whatsapp/Wechat	+86 18030132586
Email	cn@mooreplc.com
Phone Number	+86 18030132586

Products Parameters

Measurement Type	Supply / Signal	Accuracy	Frequency Response (–3 dB)	Notes
Thrust & Diff. Expansion	Proximitor / RPT: –24 V DC	±0.33 % of full-scale typical, ±1 % max	Direct filter: 1.2 HzGap filter: 0.41 Hz
	DC LVDT: +15 V DC	same as above	same as above
	AC LVDT: 2.3 Vrms, 3 400 Hz sine wave	same as above	same as above
	Rotary Potentiometer: –12.38 V DC	same as above	same as above
Ramp Differential Expansion	-	See "Ramp Differential Expansion Accuracy" (page 14)	Direct filter: 1.2 HzGap filter: 0.41 Hz	Recorder outputs not provided for Ramp and CIDE channels
Complementary Input Diff. Expansion (CIDE)	-	±0.33 % of full-scale typical, ±1 % max	Direct filter: 1.2 HzGap filter: 0.41 Hz
Case Expansion	-	±0.33 % of full-scale typical, ±1 % max	-
Recorder Outputs	Current	+4 to +20 mA (proportional to monitor full-scale)	Resolution: 0.3662 µA per bit	±0.25 % error at room temp; ±0.7 % error over temperature range; update ≤100 ms
	Compliance	0 to +12 V DC across load; load resistance 0–600 Ω	-	Monitor operation unaffected by short circuits on recorder outputs

Other Spare Parts

Part Number	Description
176449-04	3500/45 Position Monitor
135137-01	Position I/O Module with Internal Terminations for use with Proximitors, RPTs, or DC LVDTs
135145-01	Position I/O Module with External Terminations for use with Proximitors, RPTs, or DC LVDTs
139554-01	AC LVDT Position I/O Module with Internal Terminations for use with AC LVDTs
139567-01	AC LVDT Position I/O Module with External Terminations for use with AC LVDTs
125808-06	Position-Prox/DC LVDT-Euro
141208-01	Position-Prox/AC LVDT-Euro
128702-01	Recorder ET Block-Euro

Advantage

The 3500/45 Position Monitor supports a wide range of transducers including Proximity, RPTs, DC LVDTs, AC LVDTs, and rotary potentiometers. Each channel conditions its input signal to provide precise measurements such as axial thrust, differential expansion, and valve position. This ensures machinery operators receive highly accurate position data, with typical accuracy of ±0.33% of full-scale. In industrial applications, this capability allows for precise alignment monitoring, turbine shaft tracking, and expansion measurement in power plants, chemical processing, or manufacturing facilities, minimizing risk of equipment damage due to misalignment or thermal growth.

Industrial Applications

Designed for industrial environments, the monitor operates reliably across –40 °C to +85 °C storage and 0 °C to +65 °C operational temperature ranges. It maintains accuracy under non-condensing humidity up to 95% and continues normal operation even if recorder outputs are shorted. This makes it ideal for harsh industrial settings including offshore platforms, chemical plants, or heavy manufacturing sites where environmental extremes and electrical faults could otherwise compromise monitoring.

FAQ

01.What types of transducers are supported by the 3500/45?

The monitor accepts Proximity transducers, Rotary Position Transducers (RPTs), DC LVDTs, AC LVDTs, and rotary potentiometers. This versatility allows for broad application across rotating and linear machinery.

02.How many channels does the 3500/45 monitor have?

The module features four independent channels, each capable of generating multiple measured variables for accurate position monitoring.

03.What is the accuracy of the 3500/45 monitor?

Typical accuracy is ±0.33% of full-scale with a maximum of ±1%, ensuring reliable measurements for critical machinery operations.

04.Can I configure custom alarm setpoints for each channel?

Yes, operators can set alert and danger thresholds for each measured variable, ensuring machinery protection and proactive alarm notification.

05.Is the monitor suitable for harsh industrial environments?

Yes, it operates in 0–65 °C with storage down to –40 °C and humidity up to 95% non-condensing, making it robust for industrial conditions.

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