NFCP050

The Yokogawa NFCP050 is a CPU module for a Yokogawa control unit, combining real-time processing, IEC 61131-3-compliant programming support, a Java virtual machine, and integrated I/O. It uses an SH-4A (SH7730) processor operating at 256 MHz and provides Ethernet, serial communication, and an SB bus interface. Its built-in I/O includes digital, analog, and pulse input channels, reducing the need to treat all field signals as separate external I/O modules.

Technical Specifications

Parameter	Specification
Model	NFCP050
Brand	Yokogawa
Module Type	CPU module with built-in I/O
Processor	SH-4A (SH7730), 256 MHz
Main Memory	128 MB with ECC
Static RAM	1 MB with ECC, battery-backed
System Memory	128 MB on-board flash memory
Serial Interfaces	3 x RS-232; 1 x RS-422/RS-485
Ethernet Interface	1 x 10/100 Mbps Ethernet, 10BASE-T or 100BASE-TX
Built-in Digital Inputs	16 channels
Built-in Digital Outputs	8 channels
Built-in Analog Inputs	12 channels, 1-5 V
Additional Analog Input	1 channel, 0-32 V
Built-in Analog Outputs	2 channels, 4-20 mA; external power supply required
Pulse Inputs	2 channels
I/O Interface	Single SB bus
Battery	2700 mAh lithium battery
Supply Voltage	5 VDC +/- 5%
Power Consumption	1.16-2.30 W
Dimensions (W x H x D)	65.8 x 130 x 142.5 mm
Weight	0.57 kg
Slot Occupancy	2 slots
CPU Status Indicators	3 LEDs
LAN Status Indicators	2 LEDs
Serial Port Status Indicators	2 LEDs
Controls	RESET, SHUTDOWN, NETWORK ON/OFF
RAS Functions	Watchdog timer, temperature monitoring, and other functions

Processing and Memory

The NFCP050 runs a real-time operating system and supports programming languages compliant with IEC 61131-3. Its Java virtual machine provides an additional software execution environment. The processor and ECC-protected main memory support control processing, while the on-board flash memory stores system data. The battery-backed static RAM is a separate memory resource; its retention behavior depends on the module's specified battery and memory design.

Built-in I/O and Signal Handling

The integrated I/O combines 16 digital inputs, 8 digital outputs, 12 analog inputs rated for 1-5 V, one additional analog input rated for 0-32 V, two analog outputs rated for 4-20 mA, and two pulse inputs. The analog outputs require an external power supply. These channel types and signal ranges should be checked against the actual field devices before assigning signals, particularly where voltage-level or current-loop requirements differ.

Communication Interfaces

The module provides three non-isolated RS-232 ports and one non-isolated RS-422/RS-485 port, all using RJ45 modular jacks. The serial interfaces operate asynchronously. RS-232 duplex mode is configured through software, while RS-422/RS-485 duplex mode is selected using DIP switches. The RS-422/RS-485 interface includes a built-in 120-ohm terminating resistor that can be switched on or off.

The Ethernet interface supports 10BASE-T and 100BASE-TX at 10 or 100 Mbps and includes a network power switch. Separate LED groups indicate CPU, LAN, and serial-port status. The module connects to the control unit through a single SB bus interface.

Serial Communication Settings

The supported baud rates differ by port. SERIAL 1 and SERIAL 4 support rates up to 115.2 kbps, while SERIAL 2 and SERIAL 3 support rates up to 38.4 kbps. Serial connections require specially made cables according to Yokogawa's port-specific wiring assignments; an RJ45 connector alone does not establish Ethernet-style pin compatibility.

Model Suffix Identification

Yokogawa documentation lists the following NFCP050 suffix codes. Confirm the complete ordering code on the nameplate before selecting a replacement, as the suffix identifies a different configuration.

Suffix	Configuration
-S	Standard type
1	Extended type
5	Basic type without explosion protection
6	ISA Standard G3 option, without explosion protection
E	Basic type with explosion protection
F	ISA Standard G3 option, with explosion protection

The extended type refers to additional functions documented separately in the FCN-RTU Low Power Autonomous Controller Functions specification, GS 34P02Q02-01E. Do not assume these suffix variants are interchangeable.

Frequently Asked Questions

Q: Can the NFCP050 operate as a standalone CPU module?

A: The NFCP050 is specified as the CPU module for the FCN-RTU control unit. It is installed in a compatible control-unit configuration and requires the corresponding base module and power supply; it is not specified as a standalone controller independent of that hardware.

Q: What connection hardware is required for the built-in I/O?

A: Yokogawa specifies two MIL 40-pin connectors for the built-in I/O interface. The KMS40 cable and TAS40 terminal block can be used for the corresponding connections. Verify terminal assignments and signal wiring before connecting field devices.

Q: Does the NFCP050 support a redundant CPU configuration?

A: No. The published specifications state that duplex configuration is not possible. Do not assume that installing two NFCP050 modules provides a supported redundant CPU arrangement.

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