Description
Bently Nevada 122407-01 RTD Input and Record Terminal Module
Configured for sensor termination and alarm signal routing in the 3300 Series Monitoring System, the Bently Nevada 122407-01 (122407-01 RTD Input and Record Terminal Module) provides direct physical/electrical execution of RTD interface wiring, recorder output routing, and alarm relay terminal aggregation across rack-mounted machinery protection architectures.
Suffix Breakdown & Model Matrix
No structured suffix segmentation is defined for model 122407-01. The identifier represents a fixed 3300 Series terminal module configuration.
Hardware Specifications
| Parameter |
Specification |
| Model |
122407-01 |
| Brand |
Bently Nevada |
| Origin |
USA |
| Weight |
0.6 kg |
| Operating Temp |
-30 deg C to +65 deg C |
| Power Consumption |
Passive (loop powered via monitor) |
| Inputs |
RTD sensors, pressure transducers, vibration sensors |
| Outputs |
Alarm relay outputs, recorder outputs |
| Monitoring Functions |
Temperature, pressure, overspeed, vibration, position |
| Storage Temperature |
-40 deg C to +85 deg C |
| Humidity |
5–95% RH non-condensing |
| Design |
Rack-mounted modular terminal interface |
Bently Nevada RTD Lead Resistance Compensation and Signal Integrity Behavior
The 122407-01 module is positioned at the termination layer of RTD measurement chains within 3300 Series racks. RTD input wiring is routed through shielded conductors to minimize lead-wire resistance influence on temperature conversion accuracy. The module does not perform active signal conditioning; compensation is handled at the monitoring module level.
In multi-channel measurement topologies, separation of RTD and relay wiring paths reduces induced coupling from adjacent alarm output switching events. Shield termination practices are required to maintain stable resistance-to-temperature conversion under variable EMI/RFI field conditions. Improper grounding introduces offset drift due to common-mode interference across long RTD lead runs.
Frequently Asked Questions (FAQ)
Q: Does the 122407-01 provide internal signal conditioning for RTD inputs?
A: No. It functions as a passive termination interface. RTD excitation and linearization are performed in the associated 3300 Series monitor module.
Q: Can alarm relay outputs share the same wiring harness as RTD inputs?
A: No. Relay outputs generate switching transients that can induce noise into low-level RTD measurement circuits. Separate routing is required.
Q: Is the module compatible with 3500 Series systems?
A: No. The electrical and mechanical interface is designed specifically for 3300 Series rack architecture.
Field Installation Guidelines
The module must be installed in a compatible 3300 Series rack slot with verified mechanical seating across all backplane contacts before energization. RTD wiring should use twisted, shielded pairs with single-point grounding at the control cabinet reference plane.
Relay output wiring must be segregated from low-level sensor wiring to avoid inductive coupling during switching events. Shield continuity should be maintained across cable glands and terminated according to standard industrial grounding topology practices.
