Implementing 3-Switch XOR Ladder Logic with Internal Bit
Implement a 3-SPST switch XOR light circuit in LogixPro or RSLogix 500 using an internal relay bit. Includes truth tables, boolean equations, and verified.
Designed for heavy-duty turbomachinery monitoring, this rugged mechanical enclosure facilitates the precise mounting and protection of proximity transducers. The Bently Nevada 21000-34-05-15-026-01-02 serves as a robust barrier against environmental hazards, high-pressure washdowns, and explosive atmospheres, securing a 3300 XL 8 mm proximity probe inside its protective envelope. By utilizing a continuous internal sleeve, it maintains a physical process seal while allowing external access to the probe connection point, minimizing maintenance downtime during sensor replacement or calibration.
| Parameter | Value / Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Part Number | 21000-34-05-15-026-01-02 |
| Probe Option | 3300 XL 8 mm probe with connector protector, multiple approvals (-34) |
| Probe Cable Length | 0.5 meter / 20 inches (-05) |
| Standoff Adapter Length | 1.5 inches / 38 mm (-15) |
| Probe Penetration Depth | 2.6 inches / 66 mm (-026) |
| Fittings Option | One explosion-proof fitting and one plug (-01) |
| Mounting Thread Option | 3/4-14 NPT (-02) |
| Country of Origin | United States (U.S.A.) |
| Shipping Weight (Calculated) | 3.00 kg |
The Bently Nevada 21000 series features a standard aluminum dome configuration, which can be interchanged with the 31000 series when premium stainless steel casing materials are required for highly corrosive or offshore environments. The probe inside this housing is fully compatible with any standard 3300 XL Proximitor sensor loop, provided the total system cable length (including probe and extension cable) equals 5.0 meters or 9.0 meters as matched to the specific Proximitor model.
When dealing with high-temperature environments, engineers must account for thermal expansion of the machine shaft and casing. The differential growth between the housing mounting point and the shaft target can alter the probe's physical gap. Ensure that maximum operating temperatures inside the machine do not push the sensor beyond its native 177 degC thermal limit. Furthermore, condensate accumulation inside explosion-proof conduits is a common cause of high-frequency signal noise; drain loops or certified conduit drains should always be positioned at the lowest physical run point.
To verify the electrical gap during installation, connect the probe to the Proximitor using a calibrated multimeter to monitor the DC output voltage. Loosen the housing locknut, adjust the internal sleeve until the voltage reads exactly -10.0 VDC (the nominal midpoint of the linear range for a 3300 XL 8 mm system monitoring standard AISI 4140 steel), and then torque the locknut to specification. Always use the included connector protector on the coaxial link; failure to seal this connection allows fluid bypass to degrade the high-frequency RF transmission pathway.
Ensure the machinery is completely shut down and de-energized before mounting or servicing proximity housing assemblies. Verify that hazardous gas concentrations are well below flammable thresholds prior to opening any explosion-proof enclosures or pulling field cables.
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Designed for heavy-duty turbomachinery monitoring, this rugged mechanical enclosure facilitates the precise mounting and protection of proximity transducers. The Bently Nevada 21000-34-05-15-026-01-02 serves as a robust barrier against environmental hazards, high-pressure washdowns, and explosive atmospheres, securing a 3300 XL 8 mm proximity probe inside its protective envelope. By utilizing a continuous internal sleeve, it maintains a physical process seal while allowing external access to the probe connection point, minimizing maintenance downtime during sensor replacement or calibration.
| Parameter | Value / Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Part Number | 21000-34-05-15-026-01-02 |
| Probe Option | 3300 XL 8 mm probe with connector protector, multiple approvals (-34) |
| Probe Cable Length | 0.5 meter / 20 inches (-05) |
| Standoff Adapter Length | 1.5 inches / 38 mm (-15) |
| Probe Penetration Depth | 2.6 inches / 66 mm (-026) |
| Fittings Option | One explosion-proof fitting and one plug (-01) |
| Mounting Thread Option | 3/4-14 NPT (-02) |
| Country of Origin | United States (U.S.A.) |
| Shipping Weight (Calculated) | 3.00 kg |
The Bently Nevada 21000 series features a standard aluminum dome configuration, which can be interchanged with the 31000 series when premium stainless steel casing materials are required for highly corrosive or offshore environments. The probe inside this housing is fully compatible with any standard 3300 XL Proximitor sensor loop, provided the total system cable length (including probe and extension cable) equals 5.0 meters or 9.0 meters as matched to the specific Proximitor model.
When dealing with high-temperature environments, engineers must account for thermal expansion of the machine shaft and casing. The differential growth between the housing mounting point and the shaft target can alter the probe's physical gap. Ensure that maximum operating temperatures inside the machine do not push the sensor beyond its native 177 degC thermal limit. Furthermore, condensate accumulation inside explosion-proof conduits is a common cause of high-frequency signal noise; drain loops or certified conduit drains should always be positioned at the lowest physical run point.
To verify the electrical gap during installation, connect the probe to the Proximitor using a calibrated multimeter to monitor the DC output voltage. Loosen the housing locknut, adjust the internal sleeve until the voltage reads exactly -10.0 VDC (the nominal midpoint of the linear range for a 3300 XL 8 mm system monitoring standard AISI 4140 steel), and then torque the locknut to specification. Always use the included connector protector on the coaxial link; failure to seal this connection allows fluid bypass to degrade the high-frequency RF transmission pathway.
Ensure the machinery is completely shut down and de-energized before mounting or servicing proximity housing assemblies. Verify that hazardous gas concentrations are well below flammable thresholds prior to opening any explosion-proof enclosures or pulling field cables.
Global Express Shipping
Returns & Warranty
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| Country of origin |
United States
|