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PCB 649A01 Knock Monitor Transmitter - "Intelligent" electronic knock monitoring data processing transmitter for protecting reciprocating machines

PCB 649A01 Knock Monitor Transmitter - The PCB 649A01 series reciprocating machine protection knock monitor transmitter provides safer data acquisition and preliminary data processing with integrated microprocessor data processing for more reliable condition monitoring and protection of reciprocating machines.

Reciprocating machines can develop faults quite rapidly, which can lead to further serious damage. To prevent malfunctions, mechanical or, preferably, electronic vibration switches are commonly used, mostly on the equipment's crankcase. Traditional vibration switches, vibration sensors, and processing methods are not suitable for monitoring elements of reciprocating machines such as the connecting rod, crosshead, piston rod, and valves subjected to strong impact loads due to their physical limitations. The PCB 649A01 series reciprocating machine protection transmitter provides safer data acquisition and preliminary data processing with integrated microprocessor data processing for more reliable condition monitoring and protection of reciprocating machines. The operation of various elements of reciprocating equipment and their faults are related to impact-type vibration phenomena. These impacts generally have very high amplitudes but very narrow widths. Traditional vibration sensors can easily be brought into resonance or saturation by these impulses, giving false alarms, while the operation of mechanical switches can be triggered by lower-frequency vibrations sooner. Therefore, compared to the usual analysis methods for rotating machinery, a different sensor, signal content, and even more effective processing are required for proper evaluation. The PCB 649A01 series sensors were designed according to these criteria to provide protection for reciprocating equipment. For more information on the use and configuration of the 649A01 series reciprocating machine protection transmitter, please request our detailed technical guide! Features

standard 4...20 mA interface for PLC, DCS, ... systems
built-in piezoelectric vibration acceleration sensor
integrated microprocessor data processing
parameterizable processing and output modes: - output proportional to scalable peak value - output proportional to the number of peaks - output divided proportionally by scalable peak value and exceedance
standard supply voltage, minimal power consumption
robust, industrial housing
interchangeable mounting with vibration sensors
MIL-C-5015 connector or assembled (PVC/armored) cable
easy configuration via USB connection
simple installation, cost-effective design

Variants

649A01 MIL-C-5015, 2-pin connector
649A11 cable-connected
649A61 armored cable-connected
649A62 high-temperature, armored cable-connected
EP649A71 explosion-proof housing, with screw terminal
EX649A71 spark-proof version, with screw terminal

Technical Specifications

Built-in sensor: Measurement range: Sampling length: Weighting factors: Knock lower/upper limit: Supply voltage: Output resistance: Output: Temperature range:Enclosure: Connector / design:Size:

piezoelectric vibration acceleration sensor 2.5 ... 80 Hz (150 ... 4800 ¹/_min) for machines 0.2 ... 6.4 s 0.1 ... 20 mA2 ... 50 g (649A62: 8 ... 200 g) 15 ... 30 VDC 50 ohm 4-20 mA; A: (+), B (-) - 40°C ... 100°C - 40°C ... 260°C (649A62) stainless steel, welded as above; MIL-C-5015, 2-pin, or with assembled cable (PVC or steel armored) ~ Ø34 x 71 mm, 148 grams

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PCB 649A01 knock sensor transmitter

PCB 649A01 knock sensor transmitter

PCB 649A01 Knock Monitor Transmitter - "Intelligent" electronic knock monitoring data processing transmitter for protecting reciprocating machines

PCB 649A01 knock sensor transmitter