3 REPLACEMENT OF I/O MODULE
3 - 88
(2) Specifications comparison between A1SH42P and QH42P
: Compatible, : Partially changed, : Incompatible
Specifications A1SH42P QH42P
Compat-
ibility
Precautions for replacement
Input specifications
Number of input points 32 points 32 points
Isolation method Photocoupler Photocoupler
Input format Sink type
Sink type
(positive common)
Rated input voltage 12V/24VDC 24VDC 12VDC is not applicable.
Operating voltage range
10.2 to 26.4VDC
(ripple ratio within 5%)
20.4 to 28.8VDC
(ripple ratio within 5%)
12VDC is not applicable.
Rated input current
Approx. 2mA (12VDC)
Approx. 5mA (24VDC)
Approx. 4mA
The rated input current is
reduced.
*1
Maximum number of
simultaneous input
points
60% (20 points/common)
Simultaneously on (24VDC)
Refer to the derating chart.
*2
On voltage/on current 8VDC or more/2mA or more 19VDC or more/3mA or more
12VDC is not applicable.
*1
Off voltage/off current 4VDC or less/0.6mA or less 11VDC or less/1.7mA or less
12VDC is not applicable.
*1
Input resistance Approx. 5k Approx. 5.6k
The input resistance is
increased.
*1
Response
time
Off on 10ms or less (24VDC)
1ms/5ms/10ms/20ms/70ms or less
(Configure
the setting in the PLC
parameter dialog box.
)
10ms is set by default.
Set the input response time of
parameter to the default value
(10ms).
On off 10ms or less (24VDC)
1ms/5ms/10ms/20ms/70ms or less
(Configure
the setting in the PLC
parameter dialog box.
)
10ms is set by default.
Common terminal
arrangement
32 points/common
(common terminal: 1B1, 1B2)
32 points/common
(common terminal: 1B01, 1B02)
Output specifications
Number of output points 32 points 32 points
Isolation method Photocoupler Photocoupler
Output format Sink type Sink type
Rated load voltage 12/24VDC 12-24VDC
Operating load voltage
range
10.2 to 30VDC
(peak voltage 30VDC)
10.2 to 28.8VDC
(ripple ratio within 5%)
Voltage exceeding 28.8VDC is
not applicable.
Maximum load current 0.1A/point, 2A/common 0.1A/point, 2A/common
Maximum inrush current 0.7A 10ms or less 0.7A 10ms or less
Leakage current at off 0.1mA or less 0.1mA or less
Maximum voltage drop
at on
0.1VDC (typ.) 0.1A
0.2VDC (MAX.) 0.1A
0.1VDC (typ.) 0.1A
0.2VDC (MAX.) 0.1A
Response
time
Off on 1ms or less 1ms or less
On off
1ms or less
(resistance load)
1ms or less
(rated load, resistance load)
Surge suppressor Zener diode Zener diode
Protection function
Available
(overheat protection function,
overload protection function)
• The overheat protection function
is activated in increments of 1
point.
• The overload protection function
is activated in increments of 1
point.
Available
(overheat protection function,
overload protection function)
• The overheat protection function
is activated in increments of 1
point.
• The overload protection function
is activated in increments of 1
point.
Common terminal
arrangement
32 points/common
(common terminal: 2A1, 2A2)
32 points/common
(common terminal: 2A01, 2A02)
External
power
supply
Voltage
12/24VDC
(10.2 to 30VDC)
12-24VDC
(10.2 to 28.8VDC
ripple ratio within 5%)
Voltage exceeding 28.8VDC is
not applicable.
Current
12mA
(typ. 24VDC for each common)
MAX.15mA/common
(24VDC, all points on)
The current value is increased.
Operation indication
On indication (LED)
32-point switching indication with
the switch
On indication (LED)
32-point switching indication with
the switch
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