The Bently Nevada 990-08-XX-01-00 is a loop-powered vibration transmitter with MOD 165353-01. It converts proximity probe signals into a 4-20 mA output for direct PLC/DCS integration, offering a cost-effective machinery protection solution for industrial pumps and fans.
The Bently Nevada 990-08-XX-01-00 serves as a self-contained, loop-powered transmitter that bridges the gap between proximity sensors and control systems. This device accepts high-frequency signals from an 8mm proximity probe and conditions them into a standard 4-20 mA output. By integrating this transmitter, operators can monitor shaft vibration or axial position directly through a PLC or DCS. Consequently, the 990 series eliminates the need for a central monitoring rack, providing a streamlined protection solution for “balance of plant” assets.
Industrial facilities frequently deploy the on pumps, fans, and small compressors where a full 3500 rack is not required. Because the transmitter generates a current loop signal, it successfully transmits data over long distances without suffering from voltage drops or electromagnetic interference. Furthermore, the MOD 165353-01 designation indicates a specialized factory enhancement, often tailored for specific frequency responses or improved surge protection. This reliability ensures that critical machinery receives continuous oversight, thereby reducing the likelihood of unexpected mechanical failures.
Technicians usually install the transmitter in a local junction box near the monitored machine. To ensure measurement integrity, the unit includes a “Not OK” status circuit. If the probe signal fails or the cable disconnects, the transmitter drops the output current below 3.6 mA. This feature allows the control system to instantly distinguish between an actual machinery alarm and a sensor fault. Moreover, the standardized 4-20 mA interface simplifies commissioning, as it uses common twisted-pair shielded cabling for both power and signal transmission
991-06-70-01-00Product datasheet
Model number: | 991-06-70-01-00 | Module Type： | Vibration Transmitter | |
Manufacture: | Bently Nevada | Condition： | Brand New | |
Range of Product: | 990 Vibration Transmitter | Lead time： | In Stock | |
Weight: | 0.46 kg | HS CODE： | 8537101190 | |
Dimension: | 7.3x5.9x9.9cm | MOQ: | 1 | |
Product Origin: | USA | System： | TSI | |
Discontinued on: | active | Communication Service: | Ethernet router |
991-06-70-01-00 Functional Description
The Bently Nevada 991-06-70-01-00 Vibration Transmitteris a loop-powered thrust transmitter designed for OEMs of centrifugal compressors, pumps, and fans. This compact device converts signals from 3300 NSv proximity probes into a 4-20 mA output proportional to axial shaft displacement, enabling seamless integration with control systems for machinery protection. The 991-06-70-01-00 Input and Output Cards Bently Nevadafeatures an integrated Proximitor sensor, eliminating the need for external signal conditioning units.
Key advantages of the Bently Nevada 991-06-70-01-00 PDFinclude non-interacting zero/span adjustments, a test input pin for loop verification, and a Power-up Inhibit circuit to prevent transient-related errors. Its "PROX OUT" terminal and coaxial connector provide dynamic vibration signals for diagnostics, while the Not OK/Signal Defeat circuit avoids false alarms from probe faults.
The 990 Vibration Transmitter 991-06-70-01-00 Bently Nevadaoffers flexible DIN-rail or bulkhead mounting and potted construction for 100% condensing environments. Compatible with 5m/7m 3300 NSv probe systems, it excels in space-constrained installations.
Ideal for OEM applications, the Thrust Transmitter 991 Bently Nevadadelivers reliable thrust monitoring with industry-standard outputs, ensuring machinery safety in demanding industrial settings.
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