F3LC51-2N Yokogawa Communication Module

F3LC51-2N FA-M3 Yokogawa UT Link Communication Module

F3LC51-2N FA-M3 Yokogawa UT Link Communication Module

Availability: 10 left in stock

Yokogawa F3LC51-2N Communication Module The Yokogawa F3LC51-2N, also cataloged as the F3LC51 UT Link Communication Module, operates as a dedicated...

SKU: F3LC51-2N

Manufacturer: Yokogawa
Product No.: F3LC51-2N
Product Type: Communication Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 150g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa F3LC51-2N Communication Module

The Yokogawa F3LC51-2N, also cataloged as the F3LC51 UT Link Communication Module, operates as a dedicated hardware component for field instrument data exchange and RS-422/RS-485 serial integration within Yokogawa FA-M3 PLC platforms.

Hardware Specifications

Parameter	Specification
Model	F3LC51-2N
Brand	Yokogawa
Origin	Japan
Weight	0.15 kg
Dimensions	28.9 x 100 x 83.2 mm
Operating Temp	0 to +55 deg C
Power Consumption	290 mA (draws from 5 VDC backplane supply)
Interface Standards	EIA RS-422-A / RS-485
Transmission Speed	300 to 38400 bps (selectable)
Network Topology	Half-duplex, 2-wire or 4-wire multidrop
Max Distance	1200 m (via shielded twisted-pair AWG20-16)
Max Connected Nodes	Up to 32 stations
Terminating Resistor	Built-in 220 ohm (dip switch selectable)

DCS Process Control & Serial Loop Protocols

The F3LC51-2N interface board coordinates continuous cyclic polling over half-duplex RS-422/RS-485 serial physical layers, offloading protocol parsing entirely from the central PLC processor. Designed to stream continuous variable registers from process temperature controllers and digital field transmitters, the module executes automatic background memory mapping into internal sequence buffers. Built-in optocoupler barriers establish galvanically isolated channel-to-channel isolation between the external field wiring bus and the internal backplane bus. Furthermore, onboard dip switches activate internal 220 ohm line termination resistors to suppress high-frequency signal reflections across long-distance multidrop networks.

Frequently Asked Questions

Q: Does installing the F3LC51-2N require custom communication ladder logic program blocks to read field registers?

A: No, the hardware automatically maps serial frame registers directly into designated CPU memory locations through continuous background hardware polling routines.

Q: How is line termination configured when the F3LC51-2N acts as the physical end node on an RS-485 bus?

A: Technicians toggle the onboard DIP switch to engage the integrated 220 ohm terminating resistor without attaching external discrete resistors across the screw terminals.

Q: What happens to the backplane power rail if a short circuit occurs on the external RS-422/RS-485 signal line?

A: Integrated optical isolation barriers decouple the external field communication loop from the backplane bus, preventing field circuit faults from damaging internal PLC rack electronics.

Field Installation Guidelines

Insert the card vertically into the designated FA-M3 base module slot until the top latch engages the locking mechanism with a click.
Strip shielded twisted-pair signal cables (AWG20-16) and secure conductors to the 6-point M3.5 terminal block using a tightening torque of 0.8 Nm.
Ground the cable shield drain wire at a single point on the main protective earth terminal bar inside the control enclosure.
Maintain a minimum physical spacing of 100 mm between the RS-422/RS-485 signal cables and high-voltage AC power distribution wiring in cabinet wire ducts.
Verify that total end-to-end cable run distance across all connected multidrop nodes does not exceed 1200 m.

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