Features:
The AI-10 high performance analog input module for the Series II Remote Terminal Unit provides eight individually isolated input channels, each capable of converting an analog input signal to a digital signal for use as required by your application. There is also high isolation between the field terminals and the RTU logic.
The AI-10 provides a 24 volt output for use with loop powered sensors. If the module +24V is used to supply two or more inputs, channel isolation is disabled between those inputs (inputs supplied by the module +24V must use the same ground connection which prevents channel isolation). However, isolation is still maintained between the field and the RTU logic.
The AI-10 is fully compatible with previous analog input modules (AI-1 and AI-4) allowing for 8 input channels of 0-20mA or 4-20mA. However, the input wiring has been changed to allow for enhanced channel isolation and the raw scaling of each input is now 0-32767 instead of 0-32760 due to the greater resolution of the ADC.
- 8 Analog Inputs
- 16-Bit Resolution
- Isolated DC Output For Loop Power
- 5kV Field to Logic Isolation
- Channel to Channel Isolation
- Various Current and Voltage Inputs (software configurable)
- 10ms Scan Rate per channel
- AI-10-1 (Analog Input - 8 channel, 14 bit bi-directional (+ or - 0-20 mA)
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Product specifications: |
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General
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| Sub System Isolation |
The analog subsystem of the AI-10 is fully isolated from the RTU and digital system. |
| Isolation |
5000 Volts field to RTU logic |
| Channel Isolation |
Yes. Note: channel isolation is disabled between channels commonly powered by the module 24V supply. |
| Input Voltage ranges |
*0-5, 2.5, 5, 10 Volts DC (software selectable) |
| Input Current ranges |
0-20, ±10, 20, 40 mA (software selectable) |
| Live Zero |
Software configurable (e.g. 0-20 becomes 4-20mA) |
| Input |
Fully differential inputs |
| Input bias current |
< 2 nA |
| Input impedance |
250 Ohm (default)1 Gigaohm / 100 pF (optional: the internal load resistors can be factory removed if high impedance voltage inputs are required) |
| Maximum sensor source impedance |
10k ohms if high speed scanning is used, 100k ohms if medium speed scanning in use. |
| Common mode range: active selected channel |
12 Volts on 10V range, 7 on other ranges |
| Common mode range - non selected channel |
15 Volts |
| Common mode rejection |
80 dB minimum |
| Accuracy |
0.1 %, 0-50C |
| Resolution |
16 bit (15 data bits and 1 sign bit) |
| Scanning Rate |
The actual measurement sub-system is capable of scanning at better than 10 millisecond per channel (after doing internal zero and calibration checks). In the 50Hz rejection mode this reduces to one channel per 20 milliseconds (plus time to make the zero and calibration checks). |
| DC Fast Mode |
>100 readings per second |
| Fast 50Hz Rejection Mode |
Average rate of 25 channels per second |
| Fast 60Hz Rejection Mode |
Average rate of 30 channels per second |
Fault Mode - protection |
The input multiplexer integrated circuits are designed to withstand pulses of up to 100 Volts. In addition the input protection circuit will clamp differential mode voltages above 12 Volts and common mode input pulses above 28 Volts to ground using high speed Tranzorbs. |
Fault Mode – interference with other channels |
The channel in fault mode (e.g. 50 Volts different to common potential) cannot be measured while in fault mode. The effect on other channels will depend on the input impedance of the other channel. With an input impedance of less than 1000 ohms the effect of leakage currents from channels in fault condition of 50 Volts is likely to cause less than 0.1% error to the other channel. |
| AC Measurements |
Not available in release version 1. |
| Output Power |
Isolated 24VDC @ 160mA |
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| * Analog inputs can be modified from current inputs to voltage inputs by lifting one leg of the 250 ohm channel resistor. Each channel has its own resistor, so any combination of channels can be converted. Please refer to the Kingfisher Hardware manual for more information. |
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Environmental
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| Operating Temperature |
-20C to 70C / -4F to 158F |
| Storage Temperature |
-40C to 85C / -40F to 185F |
| Operating Humidity |
5 to 98% RH non-condensing |
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