Description

Yokogawa F3LC11-1F RS-232-C Communication Module

Configured for RS-232-C serial communication in Yokogawa FA-M3 control systems, the Yokogawa F3LC11-1F (F3LC11 Communication Module) provides direct physical and electrical execution of half-duplex data exchange between a PLC CPU and higher-level devices such as personal computers, FA computers, or operator displays.

Suffix Breakdown & Model Matrix

The supplied documentation identifies F3LC11-1F as a fixed model designation. No official suffix decomposition or option matrix is specified in the provided data.

Hardware Specifications

Parameter	Specification
Model	F3LC11-1F
Brand	Yokogawa
Product Type	RS-232-C Communication Module
Interface	EIA RS-232-C compliant
Transmission Mode	Half-duplex
Synchronization	Start-stop synchronization
Transmission Speed	300 bps to 115.2 kbps
Transmission Distance	15 m maximum
Number of Ports	1 (non-isolated)
Start Bit	1
Data Length	7 or 8 bits
Parity	None, Even, Odd
Stop Bit	1 or 2 bits
Error Detection	Parity check, checksum
Control Lines	RS always ON, ER always ON
XON/XOFF Control	Not supported
Protocol	Proprietary protocol
Ending Character	Configurable (Enabled/Disabled)
Protection Function	Configurable (Enabled/Disabled)
Access Range	Sequence devices, BASIC common area, ladder upload/download, RUN/STOP control, error log reading, user log reading
Maximum Module Quantity	2 modules with F3SP21 CPU; 6 modules with specified F3SP/F3BP CPUs
Current Consumption	320 mA
External Connection	D-sub 9-pin female connector, M2.6 screw
Dimensions	28.9 mm x 100 mm x 83.2 mm
Weight	110 g
Origin	Japan

Channel Communication and DCS Connectivity Characteristics

The F3LC11-1F performs serial communication through a dedicated RS-232-C interface and exchanges data using a proprietary protocol. Communication parameters including transmission speed, parity, data length, stop bits, checksum handling, ending character processing, and communication protection can be configured to match connected supervisory devices.

The module provides direct access to controller resources including sequence devices, BASIC common memory areas, ladder program upload/download functions, RUN/STOP commands, error logs, and user logs. Communication is implemented through a single non-isolated serial port and supports transmission rates up to 115.2 kbps over cable lengths up to 15 m.

Frequently Asked Questions

Q: Does the F3LC11-1F support hot swapping during operation?
A: The provided documentation does not specify hot-swap capability. Module replacement should follow the CPU and rack maintenance procedures defined for the applicable FA-M3 system.

Q: Is electrical isolation provided on the RS-232-C port?
A: No. The module is specified as having one non-isolated communication port.

Q: What communication parameters can be configured?
A: Transmission speed, data format, checksum handling, ending character settings, and communication protection functions are configurable.

Field Installation Guidelines

• Verify CPU compatibility and maximum allowable communication module count before installation.
• Use a properly terminated RS-232-C cable with a D-sub 9-pin connection matching the connected equipment.
• Maintain communication cable lengths within the specified 15 m maximum distance.
• Route serial communication cables separately from motor power wiring, contactor circuits, and variable-frequency drive output cables.
• Terminate cable shields according to the facility grounding standard to minimize conducted noise.
• Confirm parity, baud rate, stop bit, checksum, and protocol settings on both communicating devices before commissioning.
• Verify available backplane current capacity when multiple communication modules are installed in the same system.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems