Configured for Modbus data communication in the Bently Nevada 3500 Series, the Bently Nevada 3500/92 136188-01 (136188-01 Ethernet/RS232 Modbus I/O Module) provides Ethernet and RS232 physical interfaces for transferring rack monitoring data to external systems.

Model Identification

The 136188-01 is identified as the Ethernet/RS232 Modbus I/O module associated with the 3500/92 Communication Gateway. It provides the external communication interfaces; the 3500/92 gateway module performs the rack-level communication function. Bently Nevada documentation lists 136188-01 as the Ethernet/RS232 Modbus I/O module for the 3500/92 system.

Hardware Specifications

The 3500/92 system documentation identifies 136188-01 as the Ethernet/RS232 Modbus I/O module and distinguishes it from 136188-02, which uses an Ethernet/RS485 interface.

Machinery Data Communication

The module provides the physical communication path between the 3500 rack and external control or monitoring equipment. Data originating from machinery monitoring modules can be transferred through the 3500/92 communication architecture.

For vibration and rotor-dynamics applications, the communication path can carry monitored values and status information associated with parameters such as shaft vibration, position, speed, and alarm states. The 136188-01 itself should not be treated as an eddy-current probe signal conditioner; probe scaling and gap-voltage processing are functions of the applicable monitoring channels.

Ordering Information

• 1 x Bently Nevada 3500/92 136188-01 Ethernet/RS232 Modbus I/O Module
• 1 x Installed I/O module assembly
• No separate communication gateway main module is included unless specifically stated in the order
• Cables, firmware kits, mounting accessories, and documentation are not assumed unless specifically listed

Field Installation Guidelines

Rack Position

• Install the module in the designated rear I/O position associated with the 3500/92 configuration.
• Confirm that the installed gateway module and I/O module configuration are compatible before energizing the rack.
• Do not force the module into the rack connector if mechanical alignment is incorrect.

Communication Wiring

• Route Ethernet and RS232 wiring separately from high-voltage switching conductors where practical.
• Maintain shield continuity according to the applicable plant grounding scheme.
• Avoid routing communication cables parallel to high-current motor or contactor wiring over long distances.
• Verify connector seating before applying power or initiating communication.

System Compatibility

• Confirm the installed 3500/92 gateway firmware and I/O configuration before replacing an existing module.
• Bently Nevada documentation notes that older Communication Gateway modules may require a firmware upgrade when used with newer I/O modules.
• Verify the required Modbus interface type before substitution with another 3500/92 I/O variant.

Frequently Asked Questions

• Is 136188-01 the main 3500/92 gateway module?

  No. 136188-01 is the Ethernet/RS232 Modbus I/O module. The 3500/92 communication gateway main module is a separate hardware assembly.

• Which serial interface is provided by 136188-01?

  The specified serial interface is RS232. The module is paired with Ethernet communication for the 3500/92 gateway architecture.

• Does 136188-01 perform vibration measurement directly?

  No. It provides the communication interface for rack data. Vibration measurement and signal conditioning are performed by the applicable 3500 monitoring modules.

• Can 136188-01 be replaced directly by 136188-02?

  Not without checking the required interface configuration. 136188-01 uses Ethernet and RS232, while 136188-02 is listed as the Ethernet/RS485 variant.

• Is the module installed in the front or rear of the rack?

  The supplied specification identifies it as a rear I/O module. Installation should follow the designated 3500 rack position and mechanical keying.

• Is the operating temperature specified for this part?

  No operating temperature is provided in the supplied technical data. A site-specific temperature rating should therefore be confirmed from the applicable Bently Nevada documentation.

• Is power consumption specified for 136188-01?

  No definitive power-consumption value is included in the supplied data. The value should not be inferred from another 3500 module or I/O variant.

• Can older 3500/92 hardware use this I/O module?

  Compatibility depends on the gateway hardware and firmware revision. Bently Nevada documentation states that some older gateway modules require a firmware upgrade for newer I/O modules.