BENTLY 3500/53 Electronic Overspeed Detection System

BENTLY 3500/53 Electronic Overspeed Detection System

Description

The Bently Nevada™ Electronic Overspeed Detection System for the 3500 Series Machinery Detection System provides a highly reliable, fast response, redundant tachometer system intended specifically for use as part of an overspeed protection system. It is designed to meet the requirements of American Petroleum Institute (API) Standards 670 and 612 pertaining to overspeed protection.3500/53 modules can be combined to form a 2-out-of-2 or a 2-out-of-3 (recommended) voting system.

Specifications

Signal：Each Overspeed Detection module accepts a single transducer signal from a proximity probe transducer or magnetic pickup. The input signal range is +10.0 V to -24.0 V. The module internally limits signals that exceed this range.

Input Impedance：20 k Ω.

Power Consumption：8.0 watts, typical.

Transducers：Bently Nevada 3300 8 mm Proximitor 3300 16 mm HTPS, 7200 5 mm, 8 mm, 11 mm, and 14 mm Proximitor; 3300 RAM Proximitor, or Magnetic pickups.

Front Panel LEDs OK LED：Indicates when the 3500/53 Module is operating properly.

TX/XR LED：Indicates when the 3500/53 Module is communicating with other modules in the 3500 rack.

Bypass LED：Indicates when the 3500/53 Module is in Bypass Mode

Test Mode LED：indicates when the 3500/53 is in Test Mode.   

Alarm LEDs：Indicates that an alarm condition has occurred with the associated relay.

Buffered Transducer Outputs：The front of each module has one coaxial connector for buffered output. Each connector is short circuit and ESD protected.

Output Impedance：550 Ω.

Transducer Power Supply：-24 Vdc, 40 mA maximum.

Recorder：+4 to +20 mA. Values are proportional to module full-scale range (rpm). Module operation is unaffected by short circuits on recorder output.

Voltage Compliance (current output)：0 to +12 Vdc range across load. Load resistance is 0 to 600 Ω.

Resolution：0.3662 µA per bit ±0.25% error at room temperature ±0.7% error over temperature range. Update rate approximately 100 ms.

Type：Single-pole, double-throw (SPDT) relays.

Environmental Sealing：Epoxy sealed.

Arc Suppressers：250 Vrms, installed as standard.

Signal Conditioning：Specified at +25 °C (+77 °F).

Proportional Values：Proportional values are speed measurements used to monitor a machine. The Overspeed Detection Module returns the following proportional values:

Operating Temperature：-30 °C to +65 °C(-22 °F to +149 °F)

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

Humidity：95%, non-condensing.

APPLICATIONS

• Simulation 

• Instrumentation 

• Industrial control 

• Process control and monitoring 

• Factory automation 

• Intelligent networked PLC controllers 

• Automated test 

• Data acquisition

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