Specifications

30
System Monitor Modules
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AS91 system monitor module
The AS91 is a system monitor module which is loaded in an
I/O slot of an QnA/A Series base unit. These modules monitor
the I/O bus by inserting a fixed sequence program in front of
the user program to monitor specific Y outputs. When using
these modules, outputs are possible from an I/O bus error
contact, a RUN contact and general purpose contacts. A 5 VDC
check is also performed.
Further features include:
Self test function: This function serves to check that the
module itself is functioning normally with the CPU in the STOP
status.
Reset function: Allows an error output to be cleared (by
pressing the reset push-button switch) when a bus fault occurs.
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Specifications
Item Specifications
Applicable QnA/A Series PLC QnA/A Series
Output type Contact output
RUN output contact 1 point (ON in RUN status)
Error output contact 1 point (“OFF” when normal / “ON” on error occurrence)
General-purpose output contacts 3 points (switched “ON” and “OFF” by the program)
Rated switching voltage/current
24 VDC, 2A (resistance load)
240 VDC 2A (COSø=1) / 1 point
Response time
OFF→ON 10 msec max.
ON→OFF 12 msec max.
Mechanical Min. 20,000,000 operations
Rated switching voltage / current load: Min. 100,000 operations
Life
Electrical
200 VAC, 1.5A /240 VAC, 1A (COSθ=0.7): Min. 100,000 operations
200 VAC, 0.75A / 240 VAC, 0.5A (COSθ=0.35): Min. 100,000 operations
24 VDC, 1A / 100 VDC, 0.1A (L/R=7 msec Min. 100,000 operations
Maximum switching frequency 3600 times/hr
Operation indicator ON state indicated by LED
External power
Voltage 24 VDC±10%, ripple voltage less than 4 VP-P
supply
Current 30 mA
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