2 ANALOG INPUT MODULE REPLACEMENT
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2.4.1 Performance comparison
2.4 A68AD (Upgrade to Q68AD-G)
Item A68AD
Analog input
Voltage
-10 to 0 to +10VDC
(Input resistance value: Hardware version K or later: 1M, Hardware version J or earlier: 30k)
Current
+4 to +20mADC (Input resistance value: 250)
*Usable current input: -20 to 0 to +20mA
Digital output 16-bit signed binary (-2048 to +2047)
I/O characteristics
Maximum resolution
Voltage: 5mV (1/2000)
Current: 20µA (1/1000)
Overall accuracy (Accuracy in
respect to maximum digital
output value)
±1% (±20)
Maximum conversion speed Max. 2.5ms/channel
Response time -
Absolute maximum input
Voltage: ±15V
current: ±30mA
Analog input Digital output
+10V +2000
+5V or +20mA +1000
0V or +4mA ±0
-5V or -12mA -1000
-10V -2000