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3500/25 Keyphasor Module
The 3500/25 improved keyphasor module is a half height, 2-channel module used to provide keyphasing signals to the monitor modules in the 3500 rack. This module receives input signals from eddy current sensors or electromagnetic sensors and converts this signal into a digital keyphase signal, which can indicate when the keyphase marker on the shaft passes through the keyphase probe. Each keyphasor module has 2 input channels, and the 3500 mechanical protection system can install 2 keyphasor modules to receive 4 keyphasor signals. ??
Note: The keyphase signal is a pulse signal from a rotating shaft or gear that measures the time provided by one or multiple revolutions per revolution. Allow the 3500 monitor module and external fault diagnosis equipment to measure vector parameters such as 1X amplitude and phase. ?
Each keyphasor module can receive 2 signals from eddy current sensors or electromagnetic sensors. The input signal range is -0.8V to -21.0V (non insulated I/O modules) and+5V to -11V (insulated I/O modules). The amplitude can be limited within the module to ensure that the signal does not exceed this range. Passive electromagnetic sensors require a shaft speed greater than 200rpm (3.3Hz). On the front panel of the frame, there are 2 buffered key phase output signals through coaxial connectors. Two buffered key phase outputs can also be obtained on the back of the frame through European connectors. Front panel LED OK indicator: can indicate that a fault has been detected within the Keyphasor module.
TX/RX indicator light: When the Keyphasor module communicates with the Rack Interface Module (RIM), an indication is issued.
1) Buffered sensor output
2) I/O module, insulated internal terminals
3) I/O module, insulated external terminals
4) I/O module, non insulated internal terminals
5) I/O module, non insulated external terminals
6) I/O module with barriers, internal terminals
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