User`s manual

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MELSEC-Q
1 GENERAL SPECIFICATIONS OF INPUT AND OUTPUT MODULES AND
INSTRUCTIONS FOR SELECTING THEM
(16)Instructions for use of QY22
It is recommended to fit a fuse to each external terminal in order to prevent the
external device and module from being burnt if a load short-circuit occurs.
The fuse recommended for fitting is the one conforming to IEC60127 Sheet 1.
The following fuses have been confirmed by Mitsubishi to operate properly.
Fuse Model 216 02.5 216 002
Rated current 2.5A 2A
Manufacturer Littelfuse, Inc
(17)Caution points when using QY68A
Installing a fuse to the external terminal to prevent burn out of external devices and
modules in the case of a load short is recommended.
A rated voltage 3A fast type fuse is recommended.
Fuses confirmed for operation by this company are listed below.
Fuse Model 216 3.15 312 003
Rated current 3.15A 3A
Manufacturer Littelfuse, Inc
(18)I/O numbers of combined I/O modules
There are two types of combined I/O modules:
• Module using same I/O numbers for input and output
Since same number is used for input and output, the I/O numbers to be used can
be saved.
• Module using sequential I/O numbers for input and output
Since I/O assignments are the same for A series, it is useful when replacing
modules from those of A series.
Vacant
32 points
Input (X) Output (Y)
X00
X1F
Y00
Y1F
00
1F
X00
X1F
00
1F
Vacant
Y20
Y3F
20
3F
Input (X) Output (Y)
32 points
32 points
Module using same I/O numbers for input
and output (QH42P)
Module using sequential I/O numbers for input
and output (QX41Y41P)
(19)Precaution when Connecting the Uninterruptive Power Supply (UPS)
Use an on-line UPS with 5 % or less voltage fluctuation.
Do not use an off-line UPS.