Bently 3500/25 Enhanced Keyphasor Module

Bently 3500/25 Enhanced Keyphasor Module

Description

The 3500/25 Enhanced Keyphasor Module is a half-height, two-channel module used to provide Keyphasor signals to the monitor modules in a 3500 rack. The module receives input signals from proximity probes or magnetic pickups and converts the signals to digital Keyphasor signals that indicate when the Keyphasor mark on the shaft coincides with the Keyphasor transducer. The 3500 Machinery Protection System can accept up to four Keyphasor signals for normal configuration and up to eight Keyphasor signals in a paired configuration.

Specifications

Inputs

Power Consumption：3.2 Watts typical

Signal：Each Keyphasor Module accepts up to two transducer signals from proximity probe transducers or magnetic pickups. The input signal range is +0.8 V to -21.0 V (NonIsolated I/O modules) or +5V to -11V (Isolated I/O modules). Signals exceeding this range are limited internally by the module. Passive magnetic pickups require a shaft rotative speed greater than 200 rpm (3.3 Hz).

Inputs Impedance：21.8 kΩ minimum

Transducer Conditioning

Auto Threshold：Minimum signal amplitude for triggering is 2 volts peak to peak and minimum frequency is 120 rpm (2 Hz).
Manual Threshold：Use for any input above 0.017 Hz (1 rpm for 1 event per revolution).  User-selectable from 0 to -20 volts dc.  Minimum signal amplitude for triggering is 500 millivolts peak to peak.

Hysteresis：User-selectable from 0.2 to 2.5 Volts.

Outputs

Buffered Keyphasor Signals：Two buffered Keyphasor outputs are available at the front of the rack via coaxial connectors. Two buffered Keyphasor outputs are also available at the back of the rack via Euro Style connectors.

Output Impedance：504 Ω maximum buffered output impedance.

Environmental Limits

Storage Temperature：-40°C to +85°C (-40°F to +185°F)

Humidity：95%, non-condensing

Physical

Dimensions：119.9 mm x 24.4 mm x 256.5 mm

Compliance and Certifications FCC

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:

l This device may not cause harmful interference. 

l This device must accept any interference received, including interference that may cause undesired operation.

Ordering Considerations General

External Termination (ET) Blocks cannot be used with Internal Termination I/O modules. 

 When ordering I/O Modules with External Terminations, the External Termination Blocks and Cables must be ordered separately. 

 There are many technical considerations involved in using the expanded signal processing functions of the Enhanced Keyphasor Module. A qualified Bently Nevada sales representative should be consulted prior to specifying or ordering modules for such applications.

APPLICATIONS

• Simulation 

• Instrumentation 

• Industrial control 

• Process control and monitoring 

• Factory automation 

• Intelligent networked PLC controllers 

• Automated test 

• Data acquisition