Bently Nevada 3500/61 Six-Channel Temperature Monitor with Recorder Outputs
A six-channel RTD or thermocouple monitor with proportional recorder outputs for every channel.
Product Overview
3500/61 monitors machinery or process temperature through resistance-temperature detectors and thermocouples. It conditions each input, compares the result with programmed alarms and provides a recorder output for every channel.
Sensor technology, isolation and termination style are selected through the matching rear I/O module, so the family model alone does not define a complete hardware set.
Performance
- Six independently configured temperature channels.
- Selectable RTD, thermocouple or mixed-input operation with the non-isolated I/O options.
- Isolated thermocouple I/O available for applications that need channel-to-channel separation.
- Triple Modular Redundant operation supported when three monitors are installed adjacently.
Technical Details
| Manufacturer | Bently Nevada, a Baker Hughes business |
|---|---|
| Model | 3500/61 |
| Product Family | 3500 Machinery Protection System |
| Monitor Role | Temperature monitor with recorder outputs |
| Input Channels | Six |
| Supported Thermocouples | Types E, J, K and T |
| Supported RTDs | 100 Ω platinum, 120 Ω nickel and 10 Ω copper |
| Recorder Load Range | 0 to 600 Ω |
| Recorder Voltage Compliance | 0 to 12 V DC |
| Main Monitor Spare | 163179-02 |
| Configuration | 3500 Rack Configuration Software |
System Integration
- Choose non-isolated RTD/TC, isolated thermocouple or internal-barrier I/O according to the field circuit.
- Use the dedicated recorder-output termination and cable arrangement when analog outputs leave the rack.
- Configure sensor type, range and alarm behavior for each used channel.
- Group three adjacent monitors when implementing the documented TMR arrangement.
Applications
- Bearing-metal and winding temperature protection.
- Process-temperature alarms within a 3500 machinery-protection rack.
- Multi-point thermocouple installations requiring recorder outputs for plant systems.
FAQ
How does 3500/61 differ from 3500/60?
The 3500/61 adds proportional recorder outputs for all temperature channels; that changes the monitor and associated output hardware.
Which I/O module should be ordered with 3500/61?
Choose from the non-isolated, isolated-thermocouple or internal-barrier options according to sensor type and termination method.
Can RTDs and thermocouples be mixed on 3500/61?
A mixed arrangement is possible with the appropriate non-isolated I/O, provided every channel is configured for its sensor.
When should the isolated I/O option be considered for 3500/61?
Use it when thermocouple circuits require the documented channel-to-channel isolation against external interference.
What must be specified for 3500/61 recorder connections?
Identify termination-block style, cable length, assembly option, receiving-system scaling and loop load.
What commissioning checks apply to 3500/61?
Verify sensor type, cold-junction behavior, displayed temperature, alarm setpoints and each recorder loop.
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