Controller to nodes
A2FV50D-A412000 communicates with up to 32 N-IO nodes. The node is the controller-facing level of the N-IO architecture.
CENTUM VPN-IO field controller
N-IO and FIO communication platform
Yokogawa A2FV50D-A412000 Duplexed N-IO Field Control Unit
Section 01
01
Product Information
Yokogawa A2FV50D-A412000 is a duplexed N-IO field control unit for CENTUM VP. It executes field control functions with two CP471 processors and connects the controller to N-IO nodes as well as supported FIO communication modules through the interfaces assigned in its rack.
A2FV50D-A412000 separates network scale into distinct limits: the controller can address up to thirty-two N-IO nodes and 108 N-IO I/O units, while the supported FIO side is limited to eight nodes. These counts describe different levels of the I/O architecture and must not be combined as one interchangeable total.
The A2FV50D-A412000 order code selects dual Vnet/IP, dual power supplies and a 220–240 V AC feed. Operational memory has a seventy-two-hour backup after the specified charging period, while the READY contact provides a separate dry-contact indication at the external terminal.
Section 02
02
Technical Data
| Specification | Specification details |
|---|---|
| Brand | Yokogawa |
| Model | A2FV50D-A412000 |
| Product type | Duplexed N-IO field control unit |
| Country | Not specified |
| Processor modules | Two CP471 |
| Network | Dual Vnet/IP |
| Power input | 220–240 V AC |
| Power consumption | 230 VA |
| Maximum N-IO nodes | 32 |
| Maximum N-IO I/O units | 108 |
| Maximum supported FIO nodes | 8 |
| Memory backup | 72 hours after required charging |
| READY contact | NC/C, 30 V DC at 0.3 A |
| Approximate weight | 7.7 kg |
| Mounting | 19-inch rack |
Section 03
03
N-IO Communication Hierarchy
A2FV50D-A412000 connects control processing to field signals through nodes and I/O units at different layers. Its published limits describe each layer independently.
Nodes to I/O units
Across those nodes, A2FV50D-A412000 supports up to 108 N-IO I/O units. The unit count therefore cannot be substituted for the node count.
Supported FIO path
A2FV50D-A412000 can also use supported FIO communication modules, with a separate limit of eight FIO nodes. This path does not increase the N-IO node limit.
Section 04
04
Processor, Memory and Status Paths
The A2FV50D-A412000 controller pair executes the application while retained memory and the external READY contact report different aspects of controller state.
Duplexed execution
A2FV50D-A412000 contains two CP471 processor modules and two power supply modules. The duplicate hardware is part of the selected duplexed construction.
Memory backup
A2FV50D-A412000 retains operational memory for seventy-two hours after the required minimum charging period. The backup specification applies to retained controller data, not to field power.
READY contact
A2FV50D-A412000 provides an NC/C READY contact rated at 30 V DC and 0.3 A. This dry contact is wired separately from the dual Vnet/IP data paths.
Section 05
05
Product Questions
How should the 32-node and 108-unit limits of A2FV50D-A412000 be interpreted?
A2FV50D-A412000 supports up to 32 N-IO nodes and up to 108 N-IO I/O units across that architecture. A node and an I/O unit are different hierarchy levels.
Can the eight FIO nodes of A2FV50D-A412000 be counted as extra N-IO nodes?
No. A2FV50D-A412000 gives the supported FIO path its own eight-node limit; it does not increase the separate 32-node N-IO limit.
What processor construction is used by A2FV50D-A412000?
A2FV50D-A412000 uses two identical CP471 processor modules together with dual Vnet/IP and two power supply modules.
What does the READY wiring on A2FV50D-A412000 provide?
A2FV50D-A412000 provides a separate NC/C READY dry contact rated at 30 V DC and 0.3 A for external status wiring.
How long is operational memory backed up in A2FV50D-A412000?
A2FV50D-A412000 specifies a seventy-two-hour memory backup after the required charging period; this concerns retained operational data, not the AC power feed.
What identifies the exact A2FV50D-A412000 power version?
The full A2FV50D-A412000 code specifies 220–240 V AC, dual power, dual Vnet/IP, no explosion-protection option and the basic construction.
Section 06
06
Service Support
Moore Automation
https://www.mvme.cn
Moore Automation can coordinate model confirmation, requested product literature and enquiry updates through one contact record. The review keeps manufacturer codes and customer notes together without changing the requested suffix.
Model and suffix review
Product literature coordination
Enquiry status communication
Commercial details consolidated
Section 07
07
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