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iSMA-B-AAC20 Hardware User Manual
www.ismacontrolli.com
DMP239en | 1st Issue rev. 0 | 02/2022
page 5 of 42
3 Technical Specification
Power Supply
Voltage
24 V AC/DC ± 20%
Power consumption
7 W at 24 V DC; 10.5 VA at 24 V AC
Universal Inputs
Number of inputs
8
Temperature input
Measurement with attached RTDS
Accuracy ±0.1˚C
For sensors PT1000 and NI1000 use 16-bit
resolution
Voltage input
Voltage measurement from 0 to 10 V
Input impedance 100 kΩ
Measurement accuracy ±0.1%
Measurement resolution 3 mV at 12-bit and
1 mV at 16-bit
Current input
Current measurement 0-20 mA
Required external resistor 200 Ω
Measurement accuracy: ±1.1%
Measurement resolution: 15 μA at 12-bit
and 5 μA at 16-bit
Resistance input
Measurement of resistance: 0-1000 kΩ
Measurement resolution for 20 kΩ load: 20
Ω at 12-bit and 1 Ω at
16-bit
Measurement resolution for PT1000 and
NI1000: 0.1 Ω at 16-bit
Resistance measurement method: voltage
divider
Digital input
Output current ~1 mA
Measurement resolution
12-bits (default) or 16-bits
Processing time
10 ms/channel at 12-bits
140 ms/channel at 16-bits
Digital Inputs
Number of inputs
4
Type
Dry contact or fast pulse counter up to 100
Hz
Analog Outputs
Number of outputs
6
Voltage range
0-10 V DC
Max. load current
20 mA (A6 up to 5 mA)
Resolution
12-bits
Accuracy
±0.5%