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SPECIFICATIONS:
Part Number: 79492-01
Manufacturer: Bently Nevada
Product Type: Analog Six-Channel Temperature Monitor
Transducer Power Supply: 24 Vdc
VoltageCompliance: 0 to +12 Vdc
Input signal range: +10.0 V to -24.0 V
Operating Temperature: 0�C to +65�C
Output Resistance: 50 Ohm
Extension Cable Capacitance: 69.9 pF/m
Field Wiring 0.2 to 1.5 mm
Output Impedance (voltage outputs): 100 Ohm
Minimum Target Size: 15.2 mm
Dimensions: 5.7 cm x 20.3 cm x 33.0 cm
Frequency Response: (0 to 10 kHz)
Repair: 3-7 Day
Weight: 2.8 kg
Availability: In Stock
Country of Origin: United States
FUNCTIONAL DESCRIPTION:
79492-01 is an Analog Six-Channel Temperature Monitor manufactured and designed by Bently Nevada as part of the 3300 and 3500 Series for machinery vibration monitoring systems. The 3300/30 and 3300/35 Six-Channel Temperature Monitors provide six independent channels of on-line temperature monitoring. Each monitor is suitable for virtually all types of temperature measurements. The monitors accept inputs from up to six thermocouples (3300/30 TC Monitor) or resistance temperature detectors (3300/35 RTD Monitor), which are supplied separately. Monitor full-scale operating range is selected by the user upon ordering. The monitor is factory-calibrated when ordered in a system. When spare monitors or power supplies are installed, the monitor should be checked and recalibrated as needed. Ranges allowing recorder output and computer interface signal to be proportional to the input signal can be subsequently (re)programmed by the user in the field.
The multichannel temperature sensor monitors its temperature and up to six external diode-connected transistors. Each channel features programmable alert thresholds, while channels 1, 4, 5, and 6 also include programmable overtemperature thresholds. When a temperature exceeds its set limit, a status bit is triggered in the status register, activating the corresponding open-drain outputs, OVERT and ALERT. The sensor operates via a 2-wire serial interface, supporting standard SMBus protocols, including write byte, read byte, send byte, and receive byte for temperature data retrieval and alarm configuration. Designed for a -40°C to +125°C range, it comes in a 20-pin package.
ADC CONVERSION SEQUENCE:
In the default conversion mode, the sensor measures temperatures sequentially, starting with channel 1, followed by 2, 3, the local channel, 4, 5, and 6. Each result is stored in the respective temperature data register. For systems requiring faster monitoring of a specific channel, channel 1 can be measured at an increased rate. Enabling this mode (by setting bit 4 of the configuration 1 register) interleaves channel 1 measurements with the others, creating a sequence like channel 1, channel 2, channel 1, channel 3, and so on. This approach extends the total time needed to measure all seven channels compared to the default mode.
LOW-POWER STANDBY MODE:
Enter software standby mode by setting the STOP bit to 1 in the configuration 1 register. Enter hardware standby by pulling STBY low. Software standby mode disables the ADC and reduces the supply current to approximately 30µA. Hardware standby mode halts the ADC clock, but the supply current is approximately 350µA. During either software or hardware standby, data is retained in memory, and the SMBus interface is active and listening for SMBus commands. The timeout is enabled if a START condition is recognized on SMBus. Activity on the SMBus causes the supply current to increase. If a standby command is received while a conversion is in progress, the conversion cycle is interrupted, and the temperature registers are not updated.
WOC maintains the largest inventory of Replacement Parts for Bently Nevada Monitoring systems. Additionally, we offer warranty-backed unused and rebuilt boards and board repairs for damaged ones. Our team of professionals is available around the clock for your OEM needs. We at WOC are happy to help you with any automation needs you may have. Please contact our team by phone or email for pricing and availability on any components and repairs.
What is the Analog Six-Channel Temperature Monitor?
The Analog Six-Channel Temperature Monitor is a multichannel sensor designed to measure its temperature along with up to six external diode-connected transistors. It provides real-time thermal monitoring and ensures accurate temperature management for various applications.
How many channels does it support?
This monitor supports a total of seven temperature readings, including six external channels and an internal local temperature sensor. This allows for comprehensive thermal monitoring across multiple points in a system.
What communication protocol does the sensor support?
The temperature monitor communicates via a 2-wire serial interface that supports the System Management Bus (SMBus) protocol. It implements standard SMBus commands such as write byte, read byte, send byte, and receive byte, allowing external controllers to retrieve temperature data and configure operational parameters efficiently.
