900A01-0202 Honeywell Universal Analog Input Module
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900A01-0202 Universal Analog Input Module
The 900A01-0202 Universal Analog Input module supports up to 8 user-configurable inputs on a per-point basis for thermocouple, RTD, resistance, voltage (V), millivolt (mV), and milliampere (mA). It provides point-to-point isolation and back-plane isolation. The modules perform analog-to-digital conversion in synchronization with CPU control execution, eliminating data interchange latency. All analog input modules are processed in parallel, eliminating scan time increases as modules are added. A green blinking status LED on the module indicates when the module is being scanned, while a red status LED indicates when module diagnostics exist. A user-selectable BURURNOUTN value is supported on a per-channel basis. A warning signal is provided for thermocouple inputs to indicate maintenance is needed prior to sensor failure, and a sensor failure signal is also provided.
Item Specification
| Item | Specification |
|---|---|
| Inputs per Module | 8 (isolated) |
| Input Types | mV, V, T/C, RTD, ohms, mA |
| Signal Source |
- Thermocouple with cold junction compensation - RTD, PT100 3 wire, 40 ohms balanced maximum - Thermocouples: 100 Ohms/Leg - 100 (except Low), 500 & 1000 RTD: 100 Ohms/Leg - 100 YIS: 100 Ohms/Leg - 100-Low RTD & 10-ohm Cu: 10 Ohms/Leg |
| Input Impedance |
10 megohms for T/C and mV inputs; >1 megohm for volts and 250 ohms for mA inputs |
| Galvanic Input Isolation | 400 VDC point to point, 1K VDC to logic |
| Noise Rejection | Series Mode >60dB.<br>Common Mode >130dB at 120VAC |
| Burnout | T/C, mV, V configurable to upscale, downscale, defined value, or none |
| Over-range Limit | +/- 10% for linear ranges (volts). +/-1% for non-linear ranges (T/C, RTD) |
| T/C Break Detection | Via current pulse |
| Faulty Thermocouple Detection | If greater than 100 ohms, a warning status is provided as an output for the AI block |
| Accuracy |
Factory configured accuracy = ± 0.1 % of range (± 0.2 % of range for 0V to 10V and -10V to 10V) Cold junction accuracy = ± 0.7 °C |
| Reference Conditions |
Temperature = 25 °C ± 3 °C (77 °F ± 5 °F) Humidity = 45 % to 55 % RH non-condensing<br>Line voltage = Nominal ± 1 % Source resistance = 0 ohm<br>Series mode and common mode = 0 V Frequency = Nominal ± 1 % |
| Temp. Effect on Accuracy | ± 0.01% of full scale per degree Celsius maximum |
| A/D Converter | One per module |
| A/D Resolution | 15 Bits |
| Reference Junction Sensing | Via 2 RTDs at top/bottom of module |
| Update Rate | 500ms (Analog to Digital Converter per module) |
| Long Term Stability | 0.1% per year |
| Calibration |
Data is stored in non-volatile memory Redundant Factory Calibration Individual |
| Diagnostics | Monitoring of Factory Calibration, 24 VDC supply, and configuration |
| Channel Configuration Data | Stored in non-volatile memory |