Bently Nevada 3701/44 177990-01 Prox Accel Aero (PAA) Module

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The 177990-01 Prox Accel Aero (PAA) Module is an input module used in the Bently Nevada 3701/44 ADAPT Aeroderivative Monitor system.
It interfaces with proximity probes (“Prox”), accelerometers, and aeroderivative-specific transducers to enable protection and condition monitoring in aeroderivative gas turbines and their driven equipment.
The module supports multiple channel types (vibration, acceleration, radial vibration, displacement, etc.), plus a Keyphasor or speed input in addition to the sensor channels.

Parameter	Value / Description
Number of sensor input channels (dynamic)	Up to 6 channels for Proximity probes, Accelerometers, or Differential Aeroderivative-interface sensors
Keyphasor / Speed input channel	1 dedicated (channel 7), configurable for Proximitor sensors or magnetic pick-ups
Signal types supported	Accelerometer, Proximitor (proximity probe), dynamic pressure sensors, velocity, radial vibration, thrust position, etc.
A/D conversion resolution	24-bit sigma-delta converter
Bandwidth	0.5 Hz to 40 kHz (depending on configuration) for dynamic channels
Signal-to-Noise Ratio	Approx. 110 dB at 102.4 ksps (kilo-samples per second)
Output / buffered signal interface	Buffered transducer outputs via multi-pin D-Sub connector; accessory cables available to convert to BNC or SMA/SMC
Environmental operating temperature	−30 °C to +65 °C (continuous operation at 65 °C may reduce lifespan to about 11 years)
Storage temperature	−40 °C to +85 °C
Relative humidity	0-95 % non-condensing
Shock / Vibration	Vibration: 5 g at 57-500 Hz; Shock: 15 g, 11 ms
Mounting / Physical	Module plugs into the terminal base of the 3701/44; part of a skid-mounted monitor; the whole system (simplex base + modules) has approx. 26.7 × 20 × 18.2 cm size, weight ~4.5 kg in the simplex configuration

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