Bently Nevada 3500/92 (P/N 136180-01) – Communications Gateway for 3500 Machinery Protection Racks

The Bently Nevada 3500/92 Communication Gateway (model 136180-01) gives your DCS/PLC direct access to the 3500 rack’s live and latched data over Ethernet. In most cases, it’s the simplest path to bring machine protection variables into SCADA without touching individual monitor channels.

From my experience, plants typically deploy the 3500/92 when they want reliable, read?only Modbus TCP mapping of alarms, statuses, and key values from critical assets—compressors, turbines, big pumps—while keeping the protection layer isolated and stable.

• Modbus TCP data access – Publishes 3500 rack parameters to DCS/PLC/SCADA via standard Modbus TCP, which most control systems natively support.

• Rack backplane integration – Reads from the 3500 backplane; no field transducer wiring to the module itself, which keeps installation clean.

• Live and latched values – Typically provides measurement values, alarm states, channel OKs, and system status for fast diagnostics.

• Industrial Ethernet – Standard 10/100Base?T RJ45 interface for straightforward plant network connection.

• No separate power supply – Draws power directly from the 3500 rack; fewer components to maintain.

• One?slot footprint – Fits into a single 3500 rack slot, preserving cabinet space.

• Configurable point mapping – Point lists can be adjusted to match your tag strategy, which helps avoid DCS rework.

You might notice this module shows up wherever a 3500 rack is guarding rotating equipment and the control system needs a clean data feed:

• Power generation – gas/steam turbines, generator trains; DCS alarm correlation and permissives.

• Oil & gas – compressors and critical pumps; pulling vibration and status data to SCADA.

• Chemical & petrochemical – hot?standby machines where fast alarm visibility helps operators react.

• Pulp & paper, metals – fans, blowers, gearboxes tied into PLC interlocks.

• Straightforward integration – Modbus TCP support means rapid mapping to common DCS/PLC platforms, usually without gateways.

• Operational reliability – The 3500/92 rides on the proven 3500 hardware platform; fewer moving parts, fewer surprises.

• Lifecycle efficiency – No extra power supply, minimal cabling, and standard Ethernet reduce total installed cost.

• Clear separation of duties – Protection stays in the 3500, while the gateway publishes data; in many cases this simplifies compliance reviews.

• Support and spares – Widely deployed in the field; spare strategies and replacement procedures are well established.

• Panel/cabinet – Mount within a standard 3500 rack in a clean, ventilated cabinet. Maintain ambient temperature within spec.

• Networking – Use industrial?grade Cat5e/Cat6. If the network is noisy, shielded cable and proper grounding typically help.

• Slot allocation – Install in an available 3500 rack slot; avoid power and keyphasor slots. Keep Ethernet patching accessible for maintenance.

• Power – No external supply; verify the rack’s power budget is adequate for the added module.

• Commissioning – Configure Modbus mapping to match DCS tag names. After any rack configuration change, re?validate point lists.

• Routine care – Periodically review event logs and comms status, back up configuration files, and apply firmware updates where recommended.

A maintenance lead at a refinery summed it up well: “We dropped in the 3500/92 to see real?time alarms in the DCS. No extra power, no point?to?point wiring, and we were trending values by the next shift.”

• Designed for use within the Bently Nevada 3500 machinery protection system.

• Typical industrial approvals include CE and UL/cUL; RoHS compliance is common for this family.

• Manufacturer’s standard warranty usually applies (commonly 1 year); extended coverage available through service agreements.

Note: Specifications and available protocols can vary by exact ordering options. If you share your rack configuration and DCS/PLC platform, I can confirm protocol support and recommended Modbus point lists for 136180-01 specifically.