EPRO CON021 + PR6424/010-040 Eddy Current Sensor Kit

The EPRO CON021 + PR6424/010-040, also cataloged as the CON021 / PR6424 Proximity Sensors, operates as a dedicated hardware component for relative shaft displacement and vibration measurement within turbomachinery protection platforms.

Suffix Breakdown & Model Matrix

The combined kit designation pairs an external signal converter with a non-contact transducer configured by specific suffix dimensions:

• CON021: Rail-mounted signal converter (driver) module that energizes the probe and linearizes raw high-frequency signals into standardized process outputs.
• PR6424: Base model designator for EPRO eddy current proximity transducers.
• 010: Designates a 10 mm probe tip diameter, establishing the effective measuring range and spatial resolution.
• 040: Specifies an integral coaxial cable length of 4.0 meters terminating at the CON021 converter input interface.

Hardware Specifications

Eddy-Current Probe Scaling & Gap Voltage Validation

The PR6424 non-contact transducer emits a high-frequency electromagnetic field from its 10 mm tip, sensing target gap variations through impedance shifts. The matched CON021 converter conditions this raw high-frequency signal into a proportional 4-20 mA current output for direct TSI rack integration. Accurate eddy-current probe scaling requires proper mechanical probe alignment during field installation. Technicians execute gap voltage validation by monitoring the unconditioned DC gap voltage (aiming for standard -10 VDC targets) prior to locking down the threaded sensor probe body. This procedure maintains linear scaling across dynamic rotor excursions and optimizes cross-talk suppression between adjacent radial monitoring channels.

Frequently Asked Questions

Q: What physical parameters do the numbers "010-040" represent in the PR6424 probe part designation?

A: The "010" suffix defines a 10 mm sensor tip diameter, while "040" specifies an integral coaxial cable length of 4.0 meters.

Q: Can the PR6424 probe send linear displacement signals directly to a PLC without the CON021 module?

A: No, the PR6424 is a passive eddy current transducer that outputs a raw high-frequency impedance signal, requiring the CON021 signal converter to generate a standardized 4-20 mA process loop output.

Q: How do environmental conditions affect the PR6424 probe tip versus the CON021 converter housing?

A: The stainless steel PR6424 probe tip withstands fluid exposure and high ambient temperatures up to +180 deg C inside machine casings, whereas the CON021 converter installs in a mild cabinet environment between 0 and +65 deg C.

Field Installation Guidelines

Mount the CON021 converter module onto a standard 35 mm DIN rail inside a protective cabinet junction enclosure. Thread the PR6424 probe body into the machine casing bracket, using a calibrated feeler gauge or multimeter to adjust probe clearance until reading the specified DC voltage gap setting (typically targeting -10 VDC).

Connect the 4.0-meter integral probe cable to the CON021 input terminal block without coiling excess cable tightly, keeping minimum bend radii above 30 mm to preserve coaxial shield impedance. Route output 4-20 mA signals using twisted-shielded pair wiring, terminating the shield conductor strictly at the main cabinet ground bar to block ground loop noise and EMI interference.