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Technical specifications for 3500/20 125768-01
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Manufacturer:Bently Nevada
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Product Category:Machinery Monitoring Systems
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Spare Part Number:125768-01
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Estimated shipping dimensions:2.5x11.2x24.2cm
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Weight:0.45 kg
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Tariff Code:8537101190
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Counliy of origin:USA
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Interface:RS232 or RS422
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Protocol:Bently Nevada proprietary
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Maximum data rate:38.4 kbaud
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RS232 cable length:30 m maximum
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RS422 cable length:1200 m maximum
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Operating temperature:-30 to +65 degC
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Storage temperature:-40 to +85 degC
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Humidity:95% non-condensing
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Rack space:1 full-height rear slot
Information
Overview
Manuals
Common Applications
Product Precautions
Bently Nevada 125768-01 is the rear I/O module for a 3500/20 Rack Interface Module, providing selectable RS232 or RS422 host communication. It supports rack configuration and machinery-information retrieval through the Bently Nevada proprietary protocol.
- Selectable RS232 or RS422 host interface
- 38.4 kbaud maximum serial communication
- Up to 1200 m RS422 cable length
- Full-height rear-slot installation
Pair 125768-01 with the documented 3500/20 RIM and set its RS232/RS422 selector to match the installed physical layer. Verify rack address, cable length, shield and host communication before enabling remote configuration.
Important Notice: Confirm quotation scope, physical marking, included accessories and installed-system compatibility before work.
Apter Power 125768-01 Manuals and Guides
Apter Power 125768-01 Product Technical ReferenceBently Nevada 3500/20 Rack Interface Module Datasheet 141531 Rev. D
Important Notice: The first document is an Apter Power model-specific technical reference; the second link is the unmodified official manufacturer publication.
Local rack configuration
Provides a serial path for approved 3500 rack setup and retrieval.
Long-distance RS422 host link
Extends the manufacturer host connection to the published 1200 m maximum.
RS232 service connection
Supports a direct host interface within the 30 m published limit.
3500/20 installed-base maintenance
Restores the exact rear I/O execution behind the documented RIM.
Read the applicable Bently Nevada documentation before work. Verify 125768-01 from the physical marking and the installed system record.
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Read the 125768-01 rear-module marking before removal.
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Match the rear slot to the installed 3500/20 RIM.
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Record the selector position and every connector pin assignment.
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Keep RS232 cable length within 30 m.
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Keep RS422 cable length within 1200 m and verify termination practice.
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Preserve shield, signal-common and rack-ground routing.
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Confirm the rack address is unique before reconnecting host software.
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Prove configuration access and data retrieval before release.
Technical notes
Pair 125768-01 with the documented 3500/20 RIM and set its RS232/RS422 selector to match the installed physical layer. Verify rack address, cable length, shield and host communication before enabling remote configuration.
FAQ View All FAQ
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Which front module must 125768-01 accompany?It is the RS232/RS422 I/O module for the 3500/20 Rack Interface Module; verify the documented front/rear pairing.
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How is RS232 or RS422 selected on 125768-01?Use the I/O module's physical RS232/RS422 selector and record its as-found position before disturbance.
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What is the maximum serial rate for 125768-01?The official 3500/20 datasheet specifies 38.4 kbaud maximum with automatic baud capability.
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What distance limit governs an RS232 link from 125768-01?The manufacturer limit is 30 metres or 100 feet.
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How far may the RS422 interface on 125768-01 run?The published RS422 cable-length limit is 1200 metres or 4000 feet.
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Does 125768-01 use a general-purpose Modbus protocol?No. The official record identifies the communication protocol as Bently Nevada proprietary.
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What contact current should be expected at the system contacts on 125768-01?Trip Multiply, Alarm Inhibit and Rack Reset use dry contacts to common with less than 1 mA dc maximum current.
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What should a host-link acceptance test for 125768-01 prove?Confirm selector position, rack address, serial rate, configuration access, machinery-data retrieval and a fault-free final rack state.
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