Introduction
The component with part number 3500/22M 146031-01 is a monitoring module within the Bently Nevada* 3500 Machinery Monitoring System. This part number refers to the 3500/22M 4-Channel Analog Monitor.
This module is designed to monitor up to four analog DC voltage or current signals from a wide variety of process transducers. It converts these signals into engineering units and provides continuous surveillance and protection based on programmable alarm setpoints. It is a versatile module used to integrate non-vibration process parameters into the machinery protection framework.
*Bently Nevada is a part of Baker Hughes.
Parameters
The following table outlines the key technical parameters for the 3500/22M 146031-01 monitor.
| Parameter | Specification |
|---|---|
| Part Number | 3500/22M 146031-01 |
| Module Type | 4-Channel Analog Monitor |
| Compatibility | Bently Nevada 3500 Series Racks |
| Number of Channels | 4 |
| Input Signal Types | DC Voltage (e.g., 0 to +10 VDC) or DC Current (e.g., 4 to 20 mA). |
| Programmable Scaling | Yes, configurable for engineering units (e.g., °C, PSI, μm, mm/s). |
| Primary Function | Monitors non-vibration process parameters, provides programmable alarms (Alert and Danger), and can initiate a machinery shutdown. |
| Power Requirement | Powered directly from the 3500 rack backplane. |
| Communication | Integrates with the 3500 rack framework; status and values accessible via communication modules like the 3500/92. |
| Dimensions (H x W x D) | Approx. 190 mm x 40 mm x 200 mm (7.5 in x 1.6 in x 7.9 in) *Standard 3500 Series full-size module slot.* |
| Weight | Approx. 0.45 kg (1.0 lb) |
Application Scenarios
The 3500/22M Analog Monitor is deployed to monitor various auxiliary process parameters that are essential for the safe and reliable operation of machinery. Key application scenarios include:
Temperature Monitoring:
Accepting 4-20 mA signals from Resistance Temperature Detectors (RTDs) or thermocouple transmitters to monitor bearing temperatures, lube oil temperatures, or motor winding temperatures.
Pressure Monitoring:
Monitoring critical pressure points such as lube oil pressure, seal oil differential pressure, or discharge pressure to ensure they remain within safe operating limits.
Process and Position Monitoring:
Receiving DC voltage or current signals from transducers monitoring flow, level, or valve position, integrating these process values into the overall machinery protection scheme.
Integrated Machinery Protection:
Working in conjunction with other 3500 modules (like vibration and position monitors) to provide a comprehensive protection scheme. For example, if a bearing temperature (monitored by the 22M) exceeds its setpoint, it can trigger an alarm or a Danger shutdown to protect the machine.
Auxiliary Signal Interface:
Acting as a general-purpose interface to bring any standard analog signal from the field into the 3500 system for monitoring, alarming, and data logging.
Typical Machinery and Parameters Monitored:
Turbines & Compressors: Bearing Temperature, Lube Oil Pressure
Pumps & Motors: Bearing Temperature, Discharge Pressure
General: Case Expansion, Differential Expansion, Fuel Gas Pressure, and other critical process variables.
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