Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 3500/53M 286566-01 |
| Spare Model | 286566-01 |
| Brand | Bently Nevada |
| Product Type | Overspeed Detection Module |
| Series | 3500 Series Machinery Detection System |
| Origin | USA |
| Shipment Location | Xiamen, China |
| Weight | 0.92 kg |
| Dimensions | Estimated shipping size: 2.5 x 25.7 x 24 cm |
| Operating Temp | Not specified in supplied data |
| Power Consumption | 8.0 watts, typical |
| Input Impedance | 20 kOhm |
| Output Impedance | 550 Ohm |
| Transducer Power Supply | -24 VDC, 40 mA maximum |
| Voltage Compliance | 0 to +12 VDC across load |
| Load Resistance | 0 to 600 Ohm |
| Minimum Switched Current | 100 mA at 5 VDC |
| Contact Life | 100,000 operations at 5 A, 24 VDC or 120 VAC |
Mechanical Monitoring and Overspeed Signal Characteristics
The 3500/53M monitors overspeed-related electrical signals within the 3500 Series machinery protection architecture. The specified -24 VDC transducer supply supports the connected sensing circuit with a maximum supply current of 40 mA.
For Bently Nevada machinery monitoring installations, technicians should validate probe wiring and signal scaling before commissioning. Where eddy-current probes are used elsewhere in the monitoring chain, gap voltage verification can help confirm correct probe positioning; a typical Bently Nevada reference target is approximately -10 VDC, subject to the specific probe and monitor configuration.
The module provides a 550 Ohm output impedance and supports a specified load range of 0 to 600 Ohm. Furthermore, the switching circuit specifies a minimum switched current of 100 mA at 5 VDC. Contact performance is rated at 100,000 operations under the stated 5 A, 24 VDC or 120 VAC condition.
Frequently Asked Questions
Q: What transducer supply does the 3500/53M 286566-01 provide?
A: The module provides -24 VDC with a maximum transducer supply current of 40 mA.
Q: What input and output impedance values are specified?
A: The specified input impedance is 20 kOhm, while the output impedance is 550 Ohm.
Q: What switching contact life is specified?
A: The supplied specification states 100,000 operations at 5 A, 24 VDC or 120 VAC.
Field Installation Guidelines
Install the module in the designated 3500 Series rack position and verify mechanical seating before energization. Confirm all field wiring against the approved system drawing before applying power.
Maintain correct polarity for the -24 VDC transducer supply and verify the connected circuit does not exceed the stated 40 mA maximum. Check the external load against the specified 0 to 600 Ohm range.
Route transducer and signal wiring separately from high-current power conductors where practical. Use appropriate cable shielding and terminate shields according to the site grounding design to limit electrical interference.
Before commissioning, verify probe connections, signal continuity, supply voltage, and switching behavior. Where eddy-current probes form part of the measurement chain, confirm probe gap and signal scaling before enabling overspeed protection logic.
Do not apply operating-temperature limits that are not provided by the applicable Bently Nevada documentation. Use the system-specific installation manual and approved engineering drawings for environmental and rack-level requirements.
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