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Technical specifications for P0972VA
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Manufacturer:Invensys
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Product Category:DCS Systems
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Spare Part Number:P0972VA
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Estimated shipping dimensions:3.5x44.7x22.8cm
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Weight:1.06 kg
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Tariff Code:8537101190
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Counliy of origin:USA
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Nodebus transmission rate:10 Mbps; CSMA/CD
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ATS-to-switch rate:100 Mbps; full duplex
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Maximum packet throughput:1000 packets/s
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Nodebus station limit:63 stations per ATS
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Mesh network station limit:1920 combined Nodebus and Mesh stations
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Redundant module changeover:Less than 1 s
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Typical supply voltage:39 V DC
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Maximum power per module:15 W
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Optical connector:LC
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Optical cable:62.5/125 µm multimode fiber
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Maximum switch-to-ATS fiber distance:2 km
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Copper connector:RJ-45
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Copper cable:Shielded copper
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Maximum switch-to-ATS copper distance:100 m
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Operating temperature:0 to +60 °C
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Storage temperature:-40 to +70 °C
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Relative humidity:5–95%, noncondensing
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Operating altitude:-300 to +3000 m
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Storage altitude:-300 to +12000 m
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Vibration:0.5 g; 5–500 Hz
Information
Overview
Manuals
Common Applications
Product Precautions
Foxboro P0972VA enables an existing Nodebus installation to expand with FCP270 or ZCP270 control stations while retaining communication with its earlier stations.
- Supports single-module or redundant primary/backup arrangements.
- Provides LAN Interface and Nodebus extender operating modes.
- Assigns soft letterbugs through an infrared configurator.
- Displays module state, Nodebus activity and Ethernet A/B link activity.
A Mesh-connected workstation hosts the ATS. Compound and block parameter data can cross the bridge through interprocess communication, but a Mesh workstation cannot boot-host Nodebus stations through it.
Important Notice: Check whether a LAN Interface is already present on the node before selecting the ATS operating mode.
Foxboro P0972VA Manuals & Downloads
Foxboro P0972VA Manufacturer Technical Reference — Selected Pages (PDF)Foxboro P0972VA Installation & Commissioning Guide (PDF)
Use the technical reference for bridge modes, cable limits and station capacity. The installation guide follows network surveying, letterbug assignment and redundant-role testing.
Nodebus system expansion
Add Mesh control stations while maintaining communication with existing Nodebus stations.
Carrierband migration
Replace LAN Interface backbone connections with the Mesh network in a planned migration.
Redundant network bridge
Use a primary/backup ATS pair where automatic role transfer is required.
Mixed network data exchange
Exchange compound and block parameter data between Nodebus and Mesh stations.
Retain the node hosting and network-route arrangements when installing Foxboro P0972VA.
1
Identify the existing LI on the node and retain the selected bridge mode.
2
Reserve adjacent mounting slots and fit the P0926DF connector for a redundant pair.
3
Confirm the Mesh workstation assigned to host the ATS is available.
4
Keep Ethernet A and B routes identified independently throughout cable work.
5
Check optical connector cleanliness and the complete switch-to-ATS path length.
6
Retain Nodebus boot-host arrangements independently of Mesh data forwarding.
7
Verify the soft letterbug and hardware ID with the infrared configurator.
8
Test primary/backup role transfer and restore both network paths before release.
Technical notes
Redundant ATS modules occupy adjacent slots in a 1x8 or 2x8 mounting structure and use the P0926DF connector. Keep the local interlink connected so the pair can exchange health and state information.
FAQ View All FAQ
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When does P0972VA operate as a LAN Interface instead of a Nodebus extender?The ATS operates in LAN Interface mode when no LI is present on the same node. When an LI is present, it operates as a Nodebus extender.
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Can a Mesh workstation boot Nodebus stations through P0972VA?No. The bridge supports interprocess communication for compound and block parameter data, but boot hosting Nodebus stations from Mesh workstations is not supported.
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How does the backup P0972VA detect that it should take over?The two modules exchange health and state information through the network and a local interlink. If the backup no longer receives the periodic healthy indication from the primary, it assumes primary responsibilities automatically.
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How far can the optical connection between P0972VA and its Ethernet switch extend?The total optical path may reach 2 km using 62.5/125 µm multimode fiber and LC connectors. The corresponding shielded-copper connection is limited to 100 m.
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Does the 1 Gbps switch backbone make the P0972VA port a gigabit interface?No. The ATS-to-switch link operates at 100 Mbps full duplex, while the Nodebus side operates at 10 Mbps. The 1 Gbps rate applies to interswitch communication.
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Which station counts must be separated when sizing a P0972VA network?One ATS supports up to 63 stations on its Nodebus. The Mesh control network limit is up to 1920 combined Nodebus and Mesh stations; it is a system-wide limit rather than an additional per-ATS allocation.
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What hardware is needed to form a minimal network around P0972VA?The minimum arrangement includes an ATS, optionally redundant, a Mesh-based workstation to host it, and Mesh Ethernet switches.
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How is the letterbug identity of P0972VA assigned or read?The I/A Series Letterbug Configurator communicates with the module by infrared. It assigns the soft letterbug and reads the letterbug or hardware ID.
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