3300/03-03-00 Bently Nevada System Monitor

System Monitor Description

The System Monitor performs four important tasks in a 3300 monitor rack, providing:

Functions common to all monitors in the rack:

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

Connection of all installed monitors to an external communications processor (sold separately) via STATIC and DYNAMIC data ports.

Optional Serial Data Interface (SDI) for communication of transducer and monitor data to process computers, digital/distributed control systems, programmable controllers, and other control and automation systems.

Optional Dynamic Data Interface (DDI) for communication of transducer and monitor data to compatible Bently Nevada machinery management software. Depending on the type of data required, this option may eliminate the need for an external communications processor.

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: 0 to -24 V (VT = -24 Vdc); 0 to -18 V (VT = -18 Vdc).

Signal Conditioning:

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

Data Interface

OK:

• OFF when either the SDI or the DDI hardware is not functioning properly or is not installed.

RS422 Communications:

• Levels: High 2.5 V, minimum; Low 0.5 V, maximum.
• Baud Rate: 19.2 k baud, maximum, for SDI; 38.4 k baud, maximum, for DDI.
• Distance: 1200 meters (4000 feet), maximum.

RS232 Communications:

• Levels: High +5 V, minimum; Low -5 V, maximum.

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:

• To 95%, non-condensing.