Overview

The System Monitor in a 3300 monitor rack performs four critical tasks:

• Functions Common to All Monitors in the Rack:

  • Alarm setpoint adjustment.
  • Keyphasor® power, termination, conditioning, and distribution.
  • Alarm acknowledgment.

• Connection to an External Communications Processor:

  • Provides STATIC and DYNAMIC data ports for connection to an external communications processor (sold separately).

• Optional Serial Data Interface (SDI):

  • Facilitates communication of transducer and monitor data to:
    • Process computers.
    • Digital/distributed control systems.
    • Programmable controllers.
    • Other control and automation systems.

• Optional Dynamic Data Interface (DDI):

  • Enables communication of transducer and monitor data to compatible Bently Nevada machinery management software.
  • Depending on data requirements, this option may eliminate the need for an external communications processor.

Specifications

Inputs

• Power Consumption:

  • 2 watts (basic operation).
  • 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 both SDI and DDI.
• Distance: 30 meters (100 feet) maximum.

Rack Space Requirements

• Occupies one rack position.
• Must be installed in position two (next to the Power Supply).

Weight

• 0.9 kg (2.2 lbs).