Description
Bently‑Nevada 135031‑01 RIM I/O Daughter‑Board (Built‑in Modem Interface)
Product Overview
135031‑01 is rear‑mounted I/O daughter‑card for 3500/20 Rack Interface Module(RIM). It is equipped with integrated Hayes‑compatible dial‑up modem, RS‑232 / RS‑422 serial ports, system‑OK relay terminal and remote‑reset input. It plugs onto the back of 3500/20 main logic board (125744‑01 /125744‑02), providing external physical communication and relay terminals for the whole 3500 rack. OEM production discontinued, only aftermarket spare for legacy TSI racks.
135031‑01
Key Specifications
| Item | Parameter |
|---|---|
| Part Number | 135031‑01 (RIM I/O board with internal modem) |
| Manufacturer | Bently‑Nevada (Baker Hughes) |
| Installation | Rear‑side daughter‑board, mates with 3500/20 main RIM board |
| Interfaces | Built‑in 14.4k modem, RS‑232, RS‑422, screw terminal block |
| Relay | System‑OK Form‑C dry‑contact relay; remote reset discrete input |
| Protocol | Bently proprietary rack protocol, Hayes AT modem command set |
| Max modem baud rate | 14400 baud |
| Operating Temperature | ‑30 °C ~ +65 °C |
| Storage Temperature | ‑40 °C ~ +85 °C |
| Humidity | 5‑95 % RH non‑condensing |
| Weight | 0.45 kgBaker Hugh… |
| Status | Discontinued original production, aftermarket spare‑part only |
RIM I/O daughter‑board comparison |PN|Description| |—|—| |135031‑01|Rear I/O with built‑in modem + RS232/RS422| |125768‑01|Rear I/O without modem, RS232/RS422 only|
Main Applications
- Steam turbine, gas‑turbine, centrifugal compressor 3500 TSI machinery‑protection racks
- Power‑plant & petrochemical sites for remote dial‑up rack configuration & event log retrieval
- Connect to System‑1 monitoring software via dial‑up / serial link for machinery diagnostic
- Spare‑part replacement for legacy racks configured with modem‑capable RIM
135031‑01
Related Series Models
- 135031‑01 Modem‑equipped RIM rear I/O daughter‑board
- 125768‑01 Standard RS232/RS422 I/O (no modem)
- 125744‑01 TMR‑RIM main logic board
- 125744‑02 Standard‑RIM main logic board
- 3500/15 3500 rack power supply
- 3500/25 Keyphasor timing reference module
Core Features
- Integrated dial‑up modem: Supports Hayes AT‑command set, allows remote dial‑in to 3500 rack for configuration download/upload, reading alarm/event history, suitable for sites without network infrastructure.
- Dual serial interfaces RS‑232 / RS‑422: RS‑422 supports long‑distance multi‑drop serial communication to TDIX / TDXnet communication processors.
- System‑OK relay & remote‑reset input: Screw terminals provide dry‑contact rack‑health alarm output to DCS/annunciator; accepts external dry‑contact signal for remote rack alarm reset.
- Rear‑slot hot‑swap design: Installed on rack rear side, pairs with front‑mounted 3500/20 main board. Not part of protection trip path, failure will not affect monitor trip‑output logic.
- Full backward compatibility: Works with both standard‑RIM(125744‑02) and TMR‑RIM(125744‑01) main boards.
Main Functions
- Provides physical external connectors for 3500/20‑RIM main board: modem telephone‑line port, RS‑232/RS‑422 serial ports, relay & remote‑reset screw terminals.
- Realizes remote dial‑up connection: off‑site engineers can dial into rack to read vibration data, event logs, modify rack configuration.
- Outputs System‑OK dry‑contact alarm signal for external plant alarm system; receives remote‑reset contact signal to clear rack latched alarms.
- Converts internal RIM backplane signals to industry‑standard serial signals for connection to TDIX/TDXnet or host System‑1 diagnostic platform.
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