74
External
Power
Supply
(TYP
24VDC)
External
Connections
Common
Terminal
Arrangement
Surge
Suppression
Fuse
Rating
Error
Display
Current
Internal
Current
Consumption
Number of
Occupied
I/O Points
40-pin
connector
×
2
32 points/
common
None None
None
*12
0.3A
0.3A 64
points
Varistor 2A
*6
Display
*10
0.06A
20 terminal
block
connector
8 points/
common
Surge
absorbing
diode
0.11A
0.115A 16
points
Varistor 0.05A
38 terminal
block
connector
16 points/
common
0.22A
0.23A 32
points
40-pin
connector
×
2
32 points/
common
Surge
absorbing
diode
None None
0.05A 0.29A 64
points
The following specifications apply to all modules:
Isolation method
: Photocoupler
Input indication
: LEDs
*1 : The ON/OFF status of the first or latter half is indicated by the LEDs in
accordance with the setting of the selector switch on the front panel of the
module:
FH setting: First half (Y00 to Y1F), LH setting: Latter half (Y20 to Y3F)
*2 : When 12/48 VDC is used as the load power supply, a separate 24 VDC
power supply must be used as an external power supply.
*3 : When 12 VDC is used as the load power supply, a separate 24/48 VDC
power supply must be used as an external power supply.
*4 : When the module is installed adjacent to the power supply module, the value
indicated in parentheses applies.
*5 : The maximum load current differs depending on the number of
simultaneously ON points.
*6 : Fast-melting fuse (one per common)
*7 : Normal fuse (two per common)
*8 : Fast-melting fuse (two per 8-per-common unit)
*9 : Fast-melting fuse (two per common)
*10 : LED comes on when a fuse blows or the external power supply is turned off.
*11 : Since this is a built-in fuse directly fixed to the module, replace the entire
module if it blows.
*12 : TYP. 12 VDC
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