2.2.6
Analog Input Modules
Specifications
MELSEC ST Series
17
Item
ST1AD2-V
ST1AD2-I
Number of input channels
2 (1 when differential input signals are used)
Input characteristics
Single-End or differential connection
Analog input
-10 to +10 V
0 to 10 V
0 to 5 V
1 to 5 V
0 to 20 mA
4 to 20 mA
Input resistance
at Single-End
1.0 M
⏲
125
⏲
at differential
2.0 M
⏲
250
⏲
Resolution
12 bit + sign
Conversion time
max. 0.1 ms per channel
Maximum input
±
15 V
±
30 mA
Total error
±
0.2 % (ambient temperature: 20
°
C to 30
°
C),
±
0.4 % (ambient temperature: 0
°
C to 20
°
C and 30
°
C to 55
°
C)
Digital output
16 bit
Isolation method
The input channels are isolated against the backplane bus by
photocouplers. There is no isolation between the channels.
Dielectric withstand voltage
500 V AC for 1 minute across the external DC terminals and FG
Insulation resistance
≥
10 M
Ω
( (across external DC terminals and FG,
checked with insulation resistance tester)
Noise durability
Tested with noise simulator (Peak-to-peak noise voltage: 500 V,
noise width/noise frequency: 1
µ
s/25 to 60 Hz)
First transient noise compliant to IEC61000-4-4: 2 kV
Indication of operating status
With LEDs RUN and ERR
Number of occupied slices (Width)
1 slot (12.6 mm)
Number of occupied
I/O points
Inputs
2
Outputs
2
Internal power consumption
(5 V DC)
110 mA
110 mA
Weight
0.03 kg