2: M
ODULE
S
PECIFICATIONS
2-90
FC5A MicroSmart User’s Manual FC9Y-B1268
Expansion RS485 Communication Module Terminal Arrangement and Wiring Diagrams
FC5A-SIF4 — Screw Terminal Type
Applicable Terminal Block:
FC4A-PMT10P (supplied with the expansion RS485 communication module)
PWR
SD
RD
RS485
NC
A
A
B
B
SG
SG
•
Two A terminals are interconnected.
•
Two B terminals are interconnected.
•
Two SG terminals are interconnected.
•
Three
terminals are interconnected. The
terminals can be used as junction terminals of
functional ground.
Terminal
I/O
Description
NC
—
—
A
Input and Output
Data A
A
Input and Output
Data A
B
Input and Output
Data B
B
Input and Output
Data B
SG
—
Signal Ground
SG
—
Signal Ground
—
Functional ground
—
Functional ground
—
Functional ground
Wiring Example
Caution
• Use a recommended cable or a similar shielded cable for wiring the expansion RS485 communica-
tion terminals. For the recommended cable, see page 2-87 and prepare the cable.
• When the expansion RS485 communication module may malfunction due to external noise, con-
nect the shield of the cable to a proper ground.
• Before wiring, read the user’s manual for the remote device connected to the expansion RS485
communication module.
• Insert appropriate termination resistors matched to the characteristic impedance of the cable.
When the recommended cable is used, insert 100
1/2W resistors.
FC5A-SIF4
Terminal
NC
A
A
B
B
SG
SG
RS485
Remote Device
Shield
Termination
Termination Resistor
Resistor
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]