I/O Relays [X, Y]; Numbers Of I/O Relays - Mitsubishi Electric MELSEC FX3U Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
4.2

I/O Relays [X, Y]

Some input relays and output relays are secured in the main unit, and others are assigned to extension
devices according to the connection order. Because I/O replays are numbered in octal, numeric values such
as "8" and "9" do not exist.
4.2.1

Numbers of I/O relays

The table below shows input relay (X) and output relays (Y) numbering (Relay numbers are assigned in
octal.)
FX (D, DSS) PLC
3UC
FX -32MT-LT(-2) PLC
3UC
Model
name
FX Input
3U
PLC
Output
Model
name
FX
3G
Input
PLC
Output
*1. A number inside ( ) indicates the number of occupied points. The difference from the number of valid
points is unused.
Model
FX -16M
3UC
name
X000 to X007
Input
8 points
Y000 to Y007
Output
8 points
Model FX -32MT-LT
3UC
name (-2)
X000 to X017
Input
16 points
Y000 to Y017
Output
16 points
FX -16M FX -32M FX
3U 3U
X000 to X000 to X000 to
X007 X017 X027
8 points 16 points 24 points
Y000 to Y000 to Y000 to
Y007 Y017 Y027
8 points 16 points 24 points
FX -14M FX -24M
3G 3G
X000 to X015
X000 to X007
*1
8 points
14 points(16)
Y000 to Y005 Y000 to Y011
*1 *1
6 points(8) 10 points(16)
FX -32M FX -64M
3UC 3UC
X000 to X017 X000 to X037
16 points 32 points
Y000 to Y017 Y000 to Y037
16 points 32 points
When
extended
256
X000 to X357
points
240 points
in total
Y000 to Y357
240 points
-48M FX -64M FX -80M
3U 3U 3U
X000 to X000 to
X037 X047
32 points 40 points
Y000 to Y000 to
Y037 Y047
32 points 40 points
FX -40M FX -60M
3G 3G
X000 to X043
X000 to X027
24 points
36 points(40)
Y000 to Y017 Y000 to Y027
16 points 24 points
4 Devices in Detail
4.2 I/O Relays [X, Y]
When
FX -96M
3UC
extended
X000 to X057 X000 to X367
48 points 248 points
Y000 to Y057 Y000 to Y367
48 points 248 points
When
FX -128M
3U
extended
X000 to X000 to
X077 X367
64 points 248 points
Y000 to Y000 to
Y077 Y367
64 points 248 points
When
extended
128
X000 to X177
points
*1
128 points
in total
Y000 to Y177
128 points
1
2
3
256
points
in total
4
5
256
points
in total 6
7
8
9
10
89