Hitachi MICRO-EHV+ - Page 57

Chapter 2 Specifications
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Analog input specifications (OBV-AIG / AIOG)
Item
Specifications
Model name
OBV-AIG
OBV-AIOG
Number of channel
Single-ended 4 channels
Single-ended 2 channels
Input range
Voltage input
0 to 10 V (Max. 10.24 V)
Current input
0 to 20 mA (Max. 20.48 mA)
Resolution
Voltage input
0 to 10 V: 0 to 4,000 / 0 to 16,000
Current input
0 to 20 mA: 0 to 4,000 / 0 to 16,000
Accuracy *1
At 25±3 C
±0.2 % (FS)
±0.4 % (FS)
Temperature coefficient
±0.01 % / C (FS)
Conversion time
8 ms  1 to 10
4 ms  1 to 20
Input
impedance
Voltage input
150 k
Current input
250 
Cable
Shielded cable (length: Max. 20 m)
Isolation
Channel - internal circuit
Isolated
Between channels
None-isolated
*1 e.g. Accuracy at 35 C in voltage input of OBV-AIOG without noise is calculated as follows.
Accuracy: (0.4 %＋0.01 %  10 [Difference form 25 C] )  10 V [Full scale] = ±0.05 V
Analog output specifications (OBV-AIOG)
Item
Specifications
Number of channel
Single-ended 2 channels
Output range
Voltage output
0 to 10 V (Max. 10.24 V)
Current output
0 to 20 mA (Max. 20.48 mA)
Resolution
Voltage output
0 to 10 V: 0 to 4,000
Current output
0 to 20 mA: 0 to 4,000
Accuracy *1
At 25±3 C
±0.4 % (FS)
Temperature coefficient
±0.01 % / C (FS)
Conversion time
4 ms  1 to 20 (2 channels）
Output load
impedance
Voltage output
Min. 1 k
Current output
1 to 500  (Max. 10V)
Cable
Shielded cable (length: Max. 20 m)
Isolation
Channel - internal circuit
Isolated
Between channels
None-isolated
*1 e.g. Accuracy at 35 C in voltage input of OBV-AIOG without noise is calculated as follows.
Accuracy: (0.4 % + 0.01 %  10 [Difference form 25 C])  10 V [Full scale] = ±0.05 V
RTD input specifications (OBV-RTD)
Item
Specifications
Supported RTD type
Pt100 (3-wire or 2-wire)
Number of channel
4 channels (2-wire) or 2 channels (3-wire)
Measurement temperature range
-200 to 850 C
Resolution
0.1 C
Accuracy *1
Measured temperature under 0 C: Max. ±0.3 C
Measured temperature over 0 C:
Max. ± (0.3 + Measured temperature  0.2 %) C
Measurement current
0.49 mA
Conversion time
80 ms
Diagnostic error
Conversion value: H7FFF.
Cable
Shielded cable (Ohmic value of cable: Max. 5)
Isolation
Channel - internal circuit
Isolated
Between channels
None-isolated
*1 e.g. In the case of measured temperature is 100 C, Accuracy without noise is calculated as follows.
Accuracy: 0.3 C + 100 C  0.2 % = ±0.5 C