Bently Nevada 26338-52-04 Temperature Monitor Module Product Specification
26338-52-04 is a factory-calibrated plug-in temperature monitoring module designed exclusively for Bently Nevada 3500 rack system, widely deployed for temperature supervision of critical turbomachinery including steam turbines, turbo-generators, centrifugal compressors and large industrial motors in power generation, petrochemical and metallurgical industries. This module receives RTD input signals from field-mounted Pt100 resistance temperature detectors installed on bearing housings and motor stator windings, converts resistance variation into accurate temperature readings and works with the 3500 configuration platform to implement over-temperature warning and equipment safety trip interlock functions. Every finished module undergoes full functional testing, precision calibration and temperature cycling aging test before factory delivery to maintain stable measuring accuracy under industrial cabinet environments with fluctuating ambient temperature, dust accumulation and complex electromagnetic interference from adjacent high-power control equipment. Valid temperature data can be transmitted via rack backplane bus to communication gateway modules for remote data display on DCS and SIS monitoring systems.
Description
Bently Nevada 26338-52-04 Temperature Monitor Module Product Specification
1. Product Overview
26338-52-04 is a factory-calibrated plug-in temperature monitoring module designed exclusively for Bently Nevada 3500 rack system, widely deployed for temperature supervision of critical turbomachinery including steam turbines, turbo-generators, centrifugal compressors and large industrial motors in power generation, petrochemical and metallurgical industries. This module receives RTD input signals from field-mounted Pt100 resistance temperature detectors installed on bearing housings and motor stator windings, converts resistance variation into accurate temperature readings and works with the 3500 configuration platform to implement over-temperature warning and equipment safety trip interlock functions. Every finished module undergoes full functional testing, precision calibration and temperature cycling aging test before factory delivery to maintain stable measuring accuracy under industrial cabinet environments with fluctuating ambient temperature, dust accumulation and complex electromagnetic interference from adjacent high-power control equipment. Valid temperature data can be transmitted via rack backplane bus to communication gateway modules for remote data display on DCS and SIS monitoring systems.
2. Part Number Definition Breakdown
Each segmented code of 26338-52-04 stands for fixed factory-defined hardware configuration parameters. The base code 26338 represents the core series of 3500-series dedicated RTD temperature monitor board; the middle segment 52 defines channel layout, input specification for dual-channel 3-wire Pt100 sensor connection and embedded firmware version; the final segment 04 specifies hardware revision grade, front-panel indicator definition and backplane bus interface standard. Modules with different suffix codes have inconsistent internal circuit parameters and cannot be directly interchanged on-site without professional reconfiguration.
3. Core Functional Characteristics
The module is constructed with two electrically isolated independent measuring channels for 3-wire Pt100 input, ensuring abnormal failure on a single channel will not disturb normal temperature acquisition of the other channel. Users configure pre-alarm and critical trip threshold values through dedicated 3500 configuration software; once measured temperature exceeds preset safety limits, internal relay logic will be activated to trigger local alarm indication and equipment shutdown interlock protection for preventing component burnout caused by excessive overheating. Built-in comprehensive self-diagnosis function continuously monitors sensor open-circuit, short-circuit and internal circuit faults, illuminating corresponding front-panel status indicators and uploading fault diagnostic codes to the host monitoring system upon abnormality detection. Standard hot-swap plug-in structure supports live replacement inside powered 3500 rack without full system outage, greatly shortening maintenance downtime of machinery protection loops. Real-time temperature measurement data is uploaded to upper-level control systems via rack backplane communication bus for centralized remote supervision.
4. Electrical and Metrological Specifications
The module is fully compatible with industry-standard Pt100 RTD featuring the temperature coefficient of 0.00385 per degree Celsius and supports standard three-wire connection design to eliminate measuring error induced by lead wire resistance change. Default factory temperature measuring range covers from -50°C to +250°C, while users can customize segmented measuring span within -200°C ~ +350°C via system configuration software according to field application requirements. The overall measurement accuracy is controlled within ±0.3°C across full calibrated range after factory precision calibration. Internal isolation circuit restrains external power-frequency interference to guarantee stable signal sampling during long-distance field sensor wiring. The module follows unified 3500 rack backplane power and communication specification to realize seamless data interaction with other rack-based monitor and communication modules.
5. Environmental Working Parameters
Continuous permissible operating ambient temperature inside control cabinet ranges from 0°C up to +60°C; spare storage temperature is maintained between -40°C and +85°C under dry non-condensing storage condition with applicable working relative humidity spanning 5%RH to 90%RH, and condensation on circuit board surface is strictly prohibited to avoid insulation degradation and short-circuit faults. The module can withstand regular low-frequency cabinet vibration of 5Hz ~ 1kHz generated by nearby operating rotating equipment. Installation position shall stay away from direct heat radiation and corrosive gas gathering area to extend internal electronic component service life. For installation above 1000 meters altitude, appropriately reduce cabinet surrounding ambient temperature to ensure stable long-term operation.
6. Installation and Routine Maintenance Guidance
The module adopts standard 3500 rack plug-in installation design, aligned with designated slot guide rail and fixed by built-in front-panel locking latch after complete backplane insertion. During periodic maintenance work, maintenance staff regularly check front-panel indicator status, terminal wiring tightness and cabinet ventilation condition, removing accumulated dust on module surface to prevent overheating due to poor heat dissipation. If on-site module breakdown occurs, only spare part with identical part number 26338-52-04 is allowed for direct replacement; cross-use of modules with mismatched part codes is forbidden without factory authorization. All replacement modules complete full-function performance testing and alternating high-low temperature aging screening before delivery to ensure complete interchangeability during equipment overhaul.
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