Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 323174-01 |
| Associated System | 3701/55 ADAPT ESD |
| Brand | Bently Nevada |
| Product Type | Emergency Shutdown CPU Module |
| Assembly Function | ADAPT ESD CPU module |
| Protection Architecture | One of three processors in a TMR system |
| Speed Inputs per CPU | 2 independent channels |
| Common Input Array | 32 channels |
| Configurable Input Channels | 12 channels configurable as DI or 4-20 mA |
| Ethernet Connections per CPU | 2 ports |
| Ethernet Data Rate | 10/100 Mbps |
| IP Addressing | Static IP or DHCP |
| Configuration Software | Bently Nevada Monitor Configuration |
| Trip-Logic Capacity | Up to 500 steps |
| Nominal Logic Processing Time | 2 ms |
| Recorder Outputs per CPU | 2 internally powered 4-20 mA outputs |
| Time Synchronization | NTP |
CPU Architecture and Shutdown Logic
The 323174-01 performs CPU-level processing within the ADAPT ESD emergency shutdown system. Its role includes processing shutdown inputs and executing configured trip logic. The stated TMR architecture uses three processors, so this module represents one processor within the protection arrangement rather than a complete standalone shutdown system.
The documented capacity of up to 500 logic steps and nominal processing time of 2 ms describe the CPU’s logic-processing characteristics. Actual system response also depends on input acquisition, configuration, and the overall shutdown-system design.
Communication and Signal Handling
The two Ethernet ports provide network connectivity for the CPU, with support for static IP addressing or DHCP. The specified 10/100 Mbps rate identifies the Ethernet link speed. Network redundancy behavior and port configuration should be verified against the installed system documentation rather than inferred from the port count alone.
The common input array contains 32 channels, including 12 channels configurable as digital inputs (DI) or 4-20 mA inputs. In addition, each CPU provides two internally powered 4-20 mA recorder outputs. These outputs support analog recording functions; their specific signal assignments depend on the system configuration.
Configuration and Time Synchronization
The supplied specifications identify Bently Nevada Monitor Configuration as the configuration software and NTP as the time synchronization method. Correct software compatibility, firmware revision, and network settings should be confirmed before commissioning or replacing an installed CPU.
Frequently Asked Questions
Q: Can one 323174-01 CPU form a complete TMR shutdown system?
A: No. The documented architecture uses three processors for TMR operation. One spare CPU is a replacement component, not a complete independent shutdown system.
Q: How many speed inputs and Ethernet ports does this CPU provide?
A: Each CPU has two independent speed input channels and two Ethernet ports rated at 10/100 Mbps. Confirm the required wiring and network configuration against the installed system documentation.
Q: Does the 323174-01 include the terminal base and relay-output modules?
A: The supplied product information identifies the 323174-01 as a CPU module separate from the terminal base and relay-output modules. Verify the contents of the specific order before installation or system replacement.
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