F3CU04-1S Yokogawa FA-M3 Temperature Control and PID Module

Overview

The Yokogawa F3CU04-1S, also identified as the F3CU04 Temperature Control and PID Module, executes multi-loop temperature control using time-proportional PID outputs or continuous 4-20 mA outputs. Designed for the Yokogawa FA-M3 PLC platform, it supports up to four control loops, auto-tuning, fuzzy-logic overshoot suppression, heating and cooling control, and cascade control. The module occupies two slots and provides isolated input channels.

Hardware Specifications

Process Control and Signal Isolation

The F3CU04-1S supports temperature regulation through independent PID control loops. Its auto-tuning function adjusts control parameters, while the fuzzy-logic super function suppresses output overshoot. The module also supports cascade and other compound loop configurations.

For heating and cooling applications, the F3CU04-1S can provide both heating and cooling outputs without reducing the number of supported control loops. Depending on the selected output configuration and wiring, time-proportional outputs can interface with relays or solid-state relays (SSRs). Continuous PID output is available as a 4-20 mA signal.

Input channels are isolated from one another and from the internal circuitry. This isolation arrangement separates the input circuits electrically; the specific isolation voltage is not stated in the supplied data.

Setpoints, PID constants, and other control parameters are stored in the module. However, updated setpoints are not automatically written to EEPROM. Execute the specified setpoint backup procedure when nonvolatile retention of updated setpoints is required.

Frequently Asked Questions (FAQ)

Q: How many control loops does the F3CU04-1S support?

A: The module supports up to four control loops and occupies two slots in the FA-M3 PLC system.

Q: Which control output signals are available?

A: The module provides time-proportional PID control outputs and continuous PID outputs of 4-20 mA. Relay or SSR connections depend on the output configuration and wiring.

Q: Are updated setpoints automatically saved to EEPROM?

A: No. A specific setpoint backup procedure must be executed to store updated setpoints in EEPROM. Otherwise, changes to setpoints are not retained there.

Field Installation Guidelines

• Verify that the PLC base unit supports the F3CU04-1S and provides the required two-slot allocation.
• Confirm terminal assignments and output wiring against the official Yokogawa FA-M3 hardware manual before connecting field devices.
• Separate analog signal wiring from power and switching circuits to reduce electrical interference.
• Apply appropriate shield termination and grounding practices according to the system grounding design and the manufacturer’s instructions.
• Check relay and SSR interface compatibility before connecting time-proportional outputs. Verify the load and electrical ratings using the module documentation.
• Allow a minimum warm-up period of 30 minutes before evaluating control performance.
• Maintain ambient temperature change rates within the specified maximum of 10 deg C/h.
• Execute the required setpoint backup procedure after changing setpoints when EEPROM retention is needed.
• Confirm the 5 VDC backplane supply capacity for the module’s specified current consumption of 470 mA.

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