GE / Bently Nevada 79492-01 Main Board

The GE / Bently Nevada 79492-01 is a six-channel temperature monitor main board for the Bently Nevada 3300 and 3500 series machinery monitoring systems. It provides independent monitoring of six external temperature sensors plus one internal local temperature sensor, enabling simultaneous thermal surveillance of critical machinery. The board accepts thermocouple or RTD inputs (supplied separately) and delivers factory-calibrated performance with user-programmable full-scale operating ranges and alert thresholds.

## Technical Specifications

• **Channels:** 6 independent channels + 1 internal sensor (7 total temperature readings)
• **Input Types:** Thermocouple (TC Monitor) or Resistance Temperature Detector (RTD Monitor) variants
• **Transducer Power Supply:** 24 VDC
• **Voltage Compliance:** 0 to +12 VDC
• **Input Signal Range:** +10.0 V to -24.0 V
• **Output Resistance:** 100 Ohm
• **Output Impedance:** 100 Ohm
• **Extension Cable Capacitance:** 69.9 pF/m
• **Operating Temperature:** 0°C to +65°C
• **Frequency Response:** 0 to 10 kHz
• **Field Wiring:** 0.2 to 1.5 mm conductors

## Key Features

• Programmable full-scale operating range at order time
• Programmable alert thresholds across all channels
• Programmable overtemperature thresholds for channels 1, 4, 5, and 6
• Open-drain alarm outputs for OVERT and ALERT conditions
• Factory calibration with recalibration option for spare units
• Self-diagnostic capabilities
• SMBus protocol support (write byte, read byte, send byte, receive byte)
• 2-wire serial sensor interface

## Physical Characteristics

• **Dimensions:** 220 mm × 160 mm × 60 mm (8.66 × 6.30 × 2.36 inches)
• **Weight:** 1.2 kg (2.6 lbs)

## Compatibility & Integration

Designed as a main board for Bently Nevada 3300 and 3500 series systems. Supports SMBus protocols for temperature data retrieval and alarm configuration. Field wiring accommodates standard industrial conductor gauges.