Overview
Suffix Breakdown & Model Matrix
The supplied documentation identifies 87870-01 as a complete catalog number. No official suffix matrix or ordering-code breakdown is specified by the manufacturer. Therefore, no suffix interpretation is provided.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 87870-01 |
| Brand | Bently Nevada |
| Origin | Not specified |
| Weight | Approximately 0.32 kg (0.70 lbs) |
| Dimensions | Not specified |
| Operating Temp | 0 deg C to +65 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Relative Humidity | Up to 95% non-condensing |
| Power Consumption | Not specified |
| Product Type | Serial Data Interface Board Assembly (PWA) |
| Compatible System | Bently Nevada 3300 Series, 3300/03 System Monitor |
| Communication Interface | RS-232C compatible |
| Supported Baud Rates | 300 to 19,200 baud |
| Data Format | 8 data bits, 1 stop bit, no parity |
| Backplane Connection | 32-pin and 64-pin connectors |
| Status Indication | Eight diagnostic LEDs |
| Isolation | 500 VDC output-to-chassis isolation |
| Maximum Cable Length | Up to 5000 ft at cable capacitance not exceeding 50 pF/ft at 19,200 baud |
| Lifecycle Status | Discontinued by manufacturer |
Rotor Monitoring Signal Integrity
Within the Bently Nevada 3300 monitoring platform, communication hardware operates independently of the eddy-current probe measurement path. Probe scaling, gap voltage verification, and rotor dynamic calculations remain functions of the associated monitoring modules, while the 87870-01 transfers acquired values through the serial interface. During maintenance, gap voltage validation is typically performed at the monitor level using the specified probe calibration procedure, with nominal targets commonly referenced around -10 VDC where applicable. Proper cable routing and shield termination also reduce cross-talk between adjacent monitoring channels.
Frequently Asked Questions
Q: Does the 87870-01 support hot replacement while the 3300 rack remains energized?
A: The supplied documentation does not specify hot-swap capability. Replacement should follow the maintenance procedure defined for the 3300 Series system.
Q: Can the board communicate directly with modern control systems?
A: The module provides an RS-232C compatible serial interface. Integration with newer PLC or DCS platforms depends on the receiving system and any required protocol conversion.
Q: Does the module perform vibration or temperature signal processing?
A: No. The board functions as a serial communication interface. Measurement acquisition and signal conditioning remain the responsibility of the installed monitoring modules.
Field Installation Guidelines
- Verify rack power is isolated unless the applicable maintenance procedure explicitly permits servicing under power.
- Insert the board completely into the designated 3300/03 backplane slot to ensure full engagement of both the 32-pin and 64-pin connectors.
- Route serial communication cables separately from high-energy power conductors to reduce induced electrical noise.
- Terminate cable shields according to the installation practice defined for the host control system to minimize ground loop effects.
- Confirm baud rate, data format, and host communication parameters before commissioning.
- After installation, verify communication status using the onboard diagnostic LEDs before placing the interface into service.
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