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The 3500/60 (133827-01) is a versatile input/output interface designed for the 3500 Machinery Protection System by Bently Nevada. This hardware revision is engineered for External Termination (ET) architectures, enabling simplified field wiring...
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The 3500/60 (133827-01) is a versatile input/output interface designed for the 3500 Machinery Protection System by Bently Nevada. This hardware revision is engineered for External Termination (ET) architectures, enabling simplified field wiring through remote terminal blocks and dedicated signal cables.
The module provides the essential interface for thermal monitoring of critical rotating machinery, supporting both Resistance Temperature Detectors (RTDs) and Thermocouples (TCs). A key technical advantage of the 133827-01 is its flexible input configuration: engineers can configure the module for six channels of identical sensor types or mix RTD and TC inputs to meet specific casing, bearing, or process temperature monitoring requirements.
Unlike the isolated version, this model is non-isolated, making it suitable for high-density cabinet environments where common-mode voltage control is managed at the system or plant grounding level.
| Item | Specification |
|---|---|
| Module Part Number | 133827-01 |
| System Compatibility | 3500/60 Temperature Monitor |
| Termination Style | External Termination (ET) – requires external signal cable and terminal block |
| Supported Inputs | 100 Ω Platinum RTDs; Thermocouples Type J, K, E, T |
| Resolution | 1°C or 1°F (software selectable) |
| Operating Temperature | -30°C to +65°C (-22°F to +149°F) |
| Fault Tolerance | Supports Triple Modular Redundant (TMR) configurations |
When deployed in high-reliability applications, the 3500/60 (133827-01) supports Triple Modular Redundant (TMR) grouping. In this architecture, three monitors operate in parallel using 2-out-of-3 voting logic.
This ensures that a single sensor or module failure does not result in a false protective trip, thereby maintaining plant availability while preserving machinery protection integrity. Such configurations are common in gas turbines, steam turbines, and critical compressor trains.
The module is widely used in:
Gas and steam turbine casing temperature monitoring
Bearing metal temperature supervision
Compressor and motor thermal protection
Safety-critical machinery requiring TMR-based protection logic
What is the difference between this and the isolated 133835-01 version?
The 133827-01 is a non-isolated module intended for applications with shared grounding or external isolation. The 133835-01 version provides channel-to-channel galvanic isolation for enhanced noise immunity and ground loop protection.
Can I use this module for Internal Termination?
No. The 3500/60 (133827-01) is specifically designed for External Termination (ET) configurations. It is not mechanically or electrically compatible with internal termination assemblies.
