990-05-50-03-05

Features:

• Integrated Proximitor Sensor Eliminating External Signal Conditioning Requirements
• 4 to 20 mA Proportional Output with Non-Isolated Diagnostic Terminals
• Not OK/Signal Defeat Circuitry with Potted Construction for High Humidity Environments

The 990-05-50-03-05 functions as a dedicated Vibration Transmitter designed primarily for the original equipment manufacturers (OEMs) of centrifugal air compressors or small pumps, motors, and fans. It continuously accepts input from the 3300 NSv proximity probe and its matching extension cable with a 5.0 meter system length, conditioning the vibration signal into appropriate peak-to-peak amplitude engineering units and delivering this value as a proportional 4 to 20 mA industry-standard signal to the machinery control system. Seamless integration with minimal clearance installations is standard with the 990-05-50-03-05, as its compatibility with the 3300 NSv proximity probe allows transducer installation in small areas typical of centrifugal air compressors. The 990-05-50-03-05 incorporates a full-scale option of 0-5 mils pp (0-125 μm pp) and includes CSA Division 2, ATEX Zone 0, ATEX Zone 2, and ABS maritime approvals within the vibration monitoring system.

The 990-05-50-03-05 provides essential signal conditioning functions critical to the entire machinery protection path, and is a vital component of the monitoring loop, directly affecting the proper, normal operation of the overall control system. One 990-05-50-03-05 transmitter is required per vibration measurement point depending on the specific machinery configuration. The 990-05-50-03-05 occupies a compact installation footprint and is always mounted using either DIN-rail clips or bulkhead mounting screws as standard options, with non-interacting zero and span potentiometers under the transmitter label supporting loop adjustment. Its potted construction ensures reliable performance in high humidity environments up to 100% condensing.

For continuous machinery protection applications, the 990-05-50-03-05 requires proper installation of the 3300 NSv proximity probe and extension cable to maintain measurement integrity. In addition to standard 4 to 20 mA signal transmission, the 990-05-50-03-05 also performs automatic signal defeat through its Not OK/Signal Defeat circuit and includes a test input pin for quick verification of loop signal output using a function generator. The 990-05-50-03-05 executes this protection using internal circuitry that continually monitors the health of the proximity probe and cable connection. Using this method, the 990-05-50-03-05 continually verifies the sensor loop integrity. If the 990-05-50-03-05 detects that the proximity probe is faulty or the connection has become loose, it will automatically prevent high outputs or false alarms and place the loop into a defined safe state for the control system.