Overview
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 146031-02 |
| Brand | Bently Nevada |
| Product Type | Fiber Optic Ethernet I/O Module |
| Matching Interface Family | 3500/22M TDI |
| Network Standard | 100Base-FX |
| Optical Medium | Multimode fiber |
| Duplex Operation | Full duplex |
| Network Connector | MT-RJ male on I/O module; female mating cable |
| Maximum Cable Length | 2000 m |
| Standard Relay Contact Type | Ag-Ni contacts |
| Relay Rating | 5 A at 24 VDC or 120 VAC |
| Relay Switching Capacity | 120 W or 600 VA |
| Discrete Control Inputs | Trip Multiply, Alarm Inhibit, Rack Reset |
| Dry-Contact Sense Current | Less than 1 mA |
| Operating Temperature | -30 to +65 deg C |
| Storage Temperature | -40 to +85 deg C |
| Humidity Limit | 95%, noncondensing |
Fiber Optic Network Interface
The 146031-02 uses 100Base-FX Ethernet to transmit data over multimode fiber. The optical connection supports full-duplex communication, with a specified maximum cable length of 2000 m. The MT-RJ connector and fiber type must match the installed cabling. This optical configuration differs from copper Ethernet and other I/O variants.
Discrete Control and Relay Functions
The module provides discrete control inputs for Trip Multiply, Alarm Inhibit and Rack Reset. These signals support specified rack control functions rather than direct vibration measurement. The dry-contact sense current is less than 1 mA, which is relevant when checking external contact devices and control wiring.
The standard relay configuration uses silver-nickel (Ag-Ni) contacts. The listed relay rating is 5 A at 24 VDC or 120 VAC, with switching capacities of 120 W or 600 VA. Verify the applicable load conditions and relay limits before selecting the module for a control circuit.
Configuration and Selection Notes
The 146031-02 belongs to the fiber-optic Ethernet I/O configuration for the 3500/22M TDI family. It is not the TDI processor itself and does not serve as an independent vibration-monitoring channel.
Before replacement, verify the complete part number, optical connector, fiber type, relay contact material and associated TDI configuration. Do not substitute a copper Ethernet or gold-contact variant solely because it belongs to the same product family.
Frequently Asked Questions
Q: What is the function of the Bently Nevada 146031-02?
A: It provides a fiber-optic Ethernet interface and discrete control connections for a compatible 3500/22M TDI configuration. It is an I/O module, not the TDI processor.
Q: What fiber and connector does the 146031-02 use?
A: It uses multimode fiber with a 100Base-FX full-duplex interface and an MT-RJ male connector on the module. The mating cable must have the corresponding female connector and match the required fiber specification.
Q: Can the 146031-02 replace a copper Ethernet or gold-contact I/O module?
A: Not without verifying the complete part number and system configuration. The optical interface and relay contact configuration are selection criteria, so confirm the required variant before ordering a replacement.
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