6. 3500/40M Displacement Monitor

The 3500/40M Proximitor is a 4-channel displacement monitor that receives input from Bentley Nevada displacement sensors. It processes the signals to generate various vibration and displacement measurements and compares the processed signals with user-programmable alarm setpoints. Each channel of the 3500/40M can be configured using the 3500 frame configuration software to perform the following functions: Radial Vibration, Axial Displacement, Differential Expansion, Shaft Eccentricity, and REBAMR Rolling Bearing Vibration.

Note: Channels of this monitor are configured in pairs, and a maximum of two of the above functions can be executed at a time. Channels 1 and 2 perform one function, while channels 3 and 4 perform another function or the same function.

The main functions of the 3500/40M monitor are:

1) To protect the machine by continuously comparing the current vibration value of the machine with the configured alarm value and activating the alarm system;

2) To provide vibration information of critical equipment to operators and maintenance personnel. Through configuration, each channel typically processes the input signal into a "static value." Each static value has a configured warning alarm value, and every two static values can be configured into a danger alarm value. The alarm delay time can be set via software.

Front Panel LEDs (Light Emitting Diodes): OK LED: Indicates 3500/40M is operating normally.
TX/RX LEDs: Indicate 3500/40M is communicating with other modules within the 3500 frame.
Bypass LED: Indicates 3500/40M is in bypass mode.

Sensor Buffer Output: Each channel on the front panel has a coaxial connector, and each coaxial connector has short-circuit protection.

1. Front view of main module-176449-01

2. Status LED

3. Buffer sensor output

4. I/O module

5. Safety barrier I/O module, internal terminals--135489-04

6. I/O module, internal terminals--125680-01

7. I/O module, external terminals--126615-01

7. 3500/42M Displacement, Velocity, and Acceleration Monitor

The 3500/42M displacement/velocity/acceleration monitor is similar in function to the 3500/40M, but with enhanced capabilities. It is also a 4-channel monitor that accepts signals from displacement, velocity, and acceleration sensors. By processing these signals, it can perform various vibration and position measurements and compare the processed signals with user-programmed alarm values.

Each channel of the 3500/42M can be programmed using the 3500 frame configuration software to perform the following functions:

• Radial vibration
• Axial displacement
• Differential expansion
• Eccentricity
• REBAM
• Acceleration
• Velocity
• Absolute shaft vibration
• Circular acceptable zone

Note: Monitor channels are programmed in pairs, allowing up to two of the above functions to be performed simultaneously. Channels 1 and 2 perform one function, while channels 3 and 4 perform another (or the same) function. The meaning of the LEDs (light-emitting diodes) on the front panel of the 3500/42M and the fault diagnosis performed through them are similar to those of the 3500/40M module.

The following diagram shows its front and rear panels:

1. Status LED

2. Sensor buffer output

3. Displacement/velocity/accelerometer I/O module with internal terminals--128229-01

4. Displacement/velocity/accelerometer I/O module with external terminals--128240-01

5. Triple redundancy I/O module with external terminals

8. 3500/45 Differential Expansion/Axial Position Monitor

The 3500/45 Differential Expansion/Axial Position Monitor is a 4-channel monitor that receives input signals from approach eddy current sensors, rotary position sensors (RPTs), DC linear variable differential converters (DCLVDTs), AC linear variable differential converters (ACLVDTs), and rotary potentiometers. The measurement type and associated sensor inputs will determine which input/output (I/O) modules are required. It processes the input signals and compares the processed signals with user-programmable alarm settings. Using the 3500 frame configuration software, the 3500/45 can be programmed to perform the following functions:

• Axial (lateral) position

• Differential expansion

• Standard single-slope differential expansion

• Non-standard single-slope differential expansion

• Double-slope differential expansion

• Compensated differential expansion

• Shell expansion

• Valve position

Note: Monitor channels are programmed in pairs, and a maximum of two of the above functions can be performed at a time. Channels 1 and 2 can perform one function, while channels 3 and 4 can perform another (or the same) function. However, only channels 3 and 4 can perform shell expansion monitoring.

The main functions of the 3500/45 monitor are:

1) To provide mechanical protection by continuously comparing the monitored parameters with the set alarm points and triggering an alarm.

2) To provide basic machine information to operators and maintenance personnel.

Depending on the configuration, each channel can process the input signal into multiple parameters called "proportional values". Each valid proportional value can be configured as an alarm setpoint, and any two valid proportional values can be configured as a hazard setpoint.

Front Panel LEDs (Light Emitting Diodes): OK LED indicates 3500/45 is operating normally.
TX/RX LEDs: Indicate 3500/45 is communicating with other modules within the 3500 frame.
Bypass LED: Indicates 3500/45 is in the bypass off state.

For fault diagnosis via LEDs, 3500/45 is similar to the previously mentioned 3500/40M. Sensor Buffer Output: Each channel on the monitor's front panel has a corresponding coaxial connector. Each coaxial connector is short-circuit protected. When using a DC LVDT, channels 3 and 4 are -10Vdc level shifters. When using an ACLVDT, all channels are DC displays of the AC signal returned by the LVDT.

The left image shows the front view of the differential expansion/axial position monitor and the rear view of the I/O for the eddy current sensor, rotary position sensor, and DC LVDT.

1) Front view of the monitor--176449-04

2) Status LEDs

3) Sensor buffered outputs: Provides unfiltered outputs for four sensors. All outputs are short-circuit protected. When using a DC LVDT, channels 3 and 4 have a –10V level shift. When using an AC LVDT, all channels are DC representations based on the signal processing of the AC LVDT secondary output.

4) Rear view of the various I/O modules for the eddy current sensor, rotary position sensor, or DC LVDT. 5) Position I/O module, internal terminals, for eddy current sensors, rotary position sensors, or DC LVDTs

6) Position I/O module, external terminals, for eddy current sensors, rotary position sensors, or DC LVDTs--135137-01

7) Position I/O module, TMR distributed type, external terminals, for eddy current sensors or DC LVDTs--135145-01

8) Displacement/velocity acceleration I/O module, TMR distributed type, external terminals, for eddy current sensors. (Left image shows rear view of I/O for AC LVDTs and rotary potentiometers)

9) Rear view of various I/O modules for AC LVDTs

10) Position I/O module, internal terminals, for AC LVDTs--139554-01

11) Position I/O module, external terminals, for AC LVDTs

12) Rear view of various I/O modules for rotary potentiometers

13) Position I/O module, internal terminals, for rotary potentiometers

14) Position I/O Module, external terminals, for rotary potentiometer