Overview

The System Monitor is designed for use in a 3300 monitor rack, performing essential functions for effective machinery management. The monitor provides:

• Common Functions:
  • Alarm setpoint adjustment.
  • Keyphasor® power, termination, conditioning, and distribution.
  • Alarm acknowledgement.
• Connectivity:
  • Connects all installed monitors to an external communications processor (sold separately) via STATIC and DYNAMIC data ports.
• Optional Communication Interfaces:
  • Serial Data Interface (SDI): Transmits transducer and monitor data to process computers, digital/distributed control systems, programmable controllers, and other control systems.
  • Dynamic Data Interface (DDI): Enables communication of data to compatible Bently Nevada machinery management software. This option may eliminate the need for an external communications processor, depending on the required data.

Specifications

Inputs

• Power Consumption:

  • 2 watts; 4.6 watts with interface options.

• Keyphasor® Signal:

  • Accepts up to four proximity probe Keyphasor signals.
  • Input Impedance: 10 kΩ.

• RS422 Communications:

  • Impedance: 4 kΩ.
  • Threshold: 0.2 V.
  • Baud Rate:
    • 19.2 k baud maximum for SDI.
    • 38.4 k baud maximum for DDI.
  • Distance: 1200 meters (4000 feet) maximum.

• RS232 Communications:

  • Impedance: 3 kΩ to 7 kΩ.
  • Input Levels:
    • High: +3 to +25 V.
    • Low: -3 to -25 V.
  • Baud Rate: 19.2 k baud maximum for SDI and DDI.
  • Distance: 30 meters (100 feet) maximum.

Keyphasor® Signals

• Frequency Range: 60 to 30,000 cpm (rpm).

• Duty Cycle: 1% minimum.

• Amplitude: 0.5 V peak-to-peak minimum.

• DC Signal Range:

  • VT = -24 Vdc: 0 to -24 V.
  • VT = -18 Vdc: 0 to -18 V.

• Signal Conditioning:

  • Frequency Range: User-selectable; 10 kHz maximum.
  • Accuracy:
    • Dynamic Signal: ±0.3% of full scale, typical at 25°C (77°F); ±0.7% maximum at 25°C (77°F).
    • Phase: ±0.2° typical, ±1° maximum at 25°C (77°F).
    • Gap: 0.3% of DC Signal Range, typical.
    • RPM: ±1 rpm, typical.

Environmental Limits

• Operating Temperature: 0°C to +65°C (+32°F to +150°F).
• Storage Temperature: -40°C to +85°C (-40°F to +185°F).
• Relative Humidity: Up to 95%, non-condensing.

Physical Specifications

• Rack Space Requirements:

  • One rack position, installs only in position two (next to the Power Supply).

• Weight:

  • 0.9 kg (2.2 lbs).