Description
Overview
The AI845 ABB Analog Input S/R HART 8-Channel Module is a high-performance device designed to measure and convert analog signals into digital signals for industrial applications. This versatile module supports various input types, including 0–20 mA, 4–20 mA, 0–5 V, and 1–5 V d.c., and is suitable for both single-ended and redundant operation. It provides isolated channels to protect against ground loop interference, making it ideal for precise signal conversion in demanding environments.
Technical Specifications
- Brand: ABB
- Model: AI845
- Series: Analog Input S/R HART
- Input Signal Types: 0–20 mA, 4–20 mA, 0–5 V, 1–5 V d.c.
- Resolution: 12 bits
- Input Impedance: 10 MΩ (voltage input), 250 Ω (current input)
- Isolation: Isolated from ground for each group of 8 channels
- Under/Over Range:
- 0/ +15% (0–20 mA, 0–5 V)
- -12.5% / +15% (4–20 mA, 1–5 V)
- Error Margin: Max. 0.1%
- Temperature Drift: Max. 50 ppm/°C
- Input Filter Rise Time: 290 ms (0–90%)
- Update Cycle Time: 10 ms
- Current Limiting: Built-in current-limited transmitter power
- Maximum Field Cable Length: 600 meters (656 yards)
- Max Input Voltage: 11 V d.c. (non-destructive)
- NMRR: > 40 dB at 50 Hz, 60 Hz
- Rated Insulation Voltage: 50 V
- Dielectric Test Voltage: 500 V a.c.
- Power Dissipation: 3.5 W
- Current Consumption:
- +5 V Modulebus: 100 mA
- +24 V Modulebus: 50 mA
- +24 V External Max: 265 mA (22 mA + transmitter current × 1.32)
- Dimensions:
- Width: 45 mm (1.77″)
- Depth: 102 mm (4.01″), 111 mm (4.37″) including connector
- Height: 119 mm (4.7″)
- Weight: 0.23 kg (0.51 lbs.)
