The Bently Nevada 3701/55 323073-01, also cataloged as the 3701/55 Relay Output Module, operates as a dedicated hardware component for relay contact execution within the Bently Nevada ADAPT ESD system.
Hardware Specifications
Parameter
Specification
Model
3701/55 323073-01
Brand
Bently Nevada
Product Type
Relay Output Module
System Platform
ADAPT ESD System
Module Function
Relay contact output execution for shutdown and annunciation circuits
Relay Contacts
5 relay contacts per module
Relay Configuration
2 independent CPU-driven relays, 2 configurable relays, 1 system relay
Voting Architecture
Supports 2oo3 relay voting configuration
Logic Execution Time
2 ms nominal
Relay Toggle Time
8 ms
System Response Time
Less than 10 ms
Operating Voltage
18 to 36 VDC
Power Consumption
24 W typical, 35 W maximum
Operating Temp
-30 deg C to +65 deg C
Storage Temp
-45 deg C to +85 deg C
Relative Humidity
0% to 95%, non-condensing
Vibration Resistance
IEC 60068-1 compliant, 3 g at 3-57 Hz, 5 g at 57-500 Hz
Weight
Approx. 1.5 kg
Dimensions
Not specified
Housing Material
Cast aluminum module housing with industrial protective coating
Certifications
SIL 3 (IEC 61508), API 670, API 612, ATEX, IECEx, cULus, CE
Eddy-Current Signal Processing and Machinery Protection Interface
The Bently Nevada 3701/55 platform is designed for machinery protection applications where relay outputs are driven by processed vibration, speed, and shutdown logic signals. The ADAPT ESD architecture supports integration with rotating equipment monitoring functions, including overspeed detection and emergency shutdown execution.
The system design supports verification of proximity probe input conditions, including eddy-current probe scaling and gap voltage validation. The typical proximity measurement reference uses -10 VDC gap voltage targets for probe operating range verification. Signal processing functions are configured to maintain rotor dynamics monitoring accuracy and reduce measurement errors caused by cross-talk between adjacent sensing channels.
Frequently Asked Questions
Q: Does the 323073-01 Relay Output Module support redundant relay operation? A: Yes. The module supports configurable relay arrangements, including 2oo3 voting logic when integrated within the TMR architecture of the ADAPT ESD system.
Q: What is the maximum electrical response time of the relay output function? A: The nominal logic execution time is 2 ms, the relay toggle time is 8 ms, and the combined system response time is less than 10 ms.
Q: Can the relay output module operate independently without the ADAPT ESD system controller? A: No. The 323073-01 is designed as a system component and requires integration with the ADAPT ESD platform for logic processing and relay control.
Field Installation Guidelines
Install the relay output module inside an enclosure that meets the required environmental protection level for the application.
Verify correct module orientation and mechanical mounting before applying system power.
Route relay output wiring separately from high-voltage power cables and high-frequency switching conductors to minimize electrical interference.
Use appropriate shield grounding practices for connected machinery protection signal circuits.
Confirm relay contact assignments and safety logic configuration before commissioning.
Verify proximity monitoring channels, shutdown logic, and relay actuation paths during functional testing.
Follow the applicable API 670 machinery protection installation requirements when integrating with rotating equipment systems.
