125800-01
Product Name
125800 – 01 Keyphasor I/O Module
Product Description
The 125800 – 01 is a Keyphasor I/O module developed by Bently Nevada, which is an integral part of the 3500/25 enhanced keyphasor module system. It plays a crucial role in the state monitoring of rotating machinery.
This half – height, two – channel module is designed to receive keyphasor signals. It uses magnetic pickups or proximity probes to detect when the keyphasor mark on the shaft aligns with the keyphasor transducer. Once detected, it converts the input analog signals into digital keyphasor signals. These digital signals are then transmitted to the monitor modules in a 3500 rack.
In a power generation plant, for example, in a steam turbine system, the 125800 – 01 module can accurately capture the keyphasor signals related to the rotation of the turbine shaft. This information is essential for determining the shaft’s rotational speed, phase, and reference position. By providing precise timing identification, it enables 3500 monitor modules and external diagnostic tools to measure vector characteristics such as 1x vibration amplitude and phase, which are vital for assessing the health and performance of the rotating machinery.
The enhanced keyphasor module, of which 125800 – 01 is a part, not only improves the keyphasor signal processing capabilities compared to previous designs but also maintains full backward compatibility in terms of shape, fit, and functionality. This ensures its usability in older systems without the need for major modifications.
Product Parameters
Input/Output
- Input Channels: Accepts four primary input channels and four alternate input channels.
- Output Channels: Provides four output channels (one per module).
- Input Signal Detection: Utilizes magnetic pickups or proximity probes to detect keyphasor mark – transducer alignment.
- Signal Conversion: Converts input analog signals to digital keyphasor signals.
Electrical
- Power Supply: Powered by the 3500 system backplane (specific voltage details are typically in line with the 3500 system’s power supply, usually 5 V DC and ±15 V DC for related components).
- Power Consumption: Specific power consumption details are often integrated with the overall 3500 system power considerations, but generally, it is designed to operate within the power budget of the module’s role in the system.
Environmental
- Operating Temperature: 0°C to +65°C.
- Storage Temperature: – 40°C to +85°C.
- Relative Humidity: 95%, non – condensing.
Product Specifications
Physical
- Dimensions: 24.2 cm (length)×11.2 cm (width)×2.5 cm (height).
- Weight: 0.38 kg.
- Housing Material: Usually made of materials suitable for industrial environments, which may include durable plastics or metal – alloy combinations to protect internal components from mechanical stress and environmental factors.
- Mounting: Designed for installation in 3500 system frames, which typically support 19 – inch rack mounting.
