What Is SCADA? Supervisory Control Without Replacing the PLC
SCADA sits above PLCs and RTUs: it acquires field data, alarms operators, and issues supervisory commands across plants and remote assets—without replacing local deterministic control.

The Bently Nevada 146031-01 is a 10Base-T/100Base-TX Ethernet I/O Module designed for providing Ethernet interface connectivity and system contact interface functions for the 3500/22M Transient Data Interface (TDI) within the 3500 Machinery Monitoring System. Mounted in the rear slot directly behind the 3500/22M TDI main module, it features an RJ-45 Ethernet port supporting BN Host Protocol and BN TDI Protocol over TCP/IP to route steady-state and dynamic waveform data to host software such as System 1 Condition Monitoring and Diagnostic software. The 146031-01 incorporates an onboard OK Relay for rack status annunciation, system contact inputs for Trip Multiply, Alarm Inhibit, and Rack Reset, as well as a dedicated 2-pin Signal Common terminal for instrument ground connection.
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Part Number | 146031-01 |
| Module Type | 10Base-T/100Base-TX Ethernet I/O Module |
| Rack Space Requirement | 1 full-height rear slot |
| Ethernet Communication | 10Base-T or 100Base-TX Ethernet, autosensing (conforms to IEEE802.3) |
| Connector Type | RJ-45 (telephone jack style) |
| Cable Length | 100 metres (328 feet) maximum |
| Supported Protocols | BN Host Protocol and BN TDI Protocol using Ethernet TCP/IP |
| OK Relay Function | Indicates normal operation or rack faults; user-selectable OPEN or CLOSED contact (Normally Energized) |
| Standard OK Relay Rating | 5A @ 24 Vdc / 120 Vac, 120 Watts / 600 VA Switched Power (maximum) |
| Arc Protection | Integrated arc suppressors |
| Trip Multiply Input | <1 mAdc, Dry Contact to Common |
| Alarm Inhibit Input | <1 mAdc, Dry Contact to Common |
| Rack Reset Input | <1 mAdc, Dry Contact to Common |
| Signal Common Connector | 2-pin connector for single point Instrument Ground connection |
| Operating Temperature | -30 degC to +65 degC (-22 degF to +149 degF) |
| Storage Temperature | -40 degC to +85 degC (-40 degF to +185 degF) |
| Humidity | 95%, non-condensing |
| Dimensions (H x W x D) | 241.3 mm x 24.4 mm x 99.1 mm (9.50 in x 0.96 in x 3.90 in) |
| Weight | 0.20 kg (0.44 lbs) |
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| Color pattern |
Greyish White
|
| Country of origin |
United States
|
| Power source |
DC Power
|