AI801 Analog Input Module, 0(4)...20 mA

Description

The AI801 Analog Input Module has 8 channels for current input. The current input is able to handle a short circuit to the transmitter supply at least 30 V d.c without damage. Current limiting is performed with a PTC resistor. The input resistance of the current input is 250 ohm, PTC included.

The module distributes the external transmitter supply to each channel. This adds a simple connection to distribute the supply to 2-wire transmitters. There is no current limiting on the transmitter power terminals. All eight channels are isolated from the ModuleBus in one group. Power to the input stages is converted from the external 24 V.

Features

• 8 channels for 0...20 mA, 4...20 mA d.c., single ended unipolar inputs.
• 1 group of 8 channels isolated from ground.
• 12 Bit resolution.
• Input shunt resistors protected to 30 V by PTC resistor.
• Analog inputs are short circuit secured to ZP or +24 V.
• The input withstands HART communication.
• Process and power connections via detachable connectors.

Appendix A Specifications

AI801 Analog Input Module, 0(4)...20 mA
3BSE020924-510 B 65

Technical Data

AI801 Analog Input Module Specifications at 25°C

Feature: AI801 Analog Input Module
Number of Channels: 8
Type of Input: Unipolar single ended
Measurement Range: 0...20 mA, 4...20 mA (1)
Under/Over Range: -0% / +15%
Input Impedance (at Current Input) (Including PTC): ≥230 Ω, ≤270 Ω
Maximum Field Cable Length: 600 meters (656 yd.)
Voltage Input, Maximum Non-Destructive: 30 V d.c.
NMRR, 50 Hz, 60 Hz: >40 dB
Error: Max. 0.1%
Resolution: 12 bit
Temperature Drift: Typ. 50 ppm/°C, Max. 80 ppm/°C
Update Cycle Time: 1 ms
Current Consumption 24 V (Process Power Supply, UPx): 30 mA
Current Consumption 5 V (Modulebus): 70 mA
Power Dissipation: 1.1 W
Input Filter Cut Off Frequency: Second order filter, 3.5 Hz
Input Filter (Rise Time 0-90%): 140 ms
Isolation: Groupwise isolated from ground
Rated Insulation Voltage: 50 V
Dielectric Test Voltage: 500 V a.c.
Acceptable Wire Sizes:

• Solid: 0.05-2.5 mm², 30-12 AWG
• Stranded: 0.05-1.5 mm², 30-12 AWG
  Recommended Torque: 0.5-0.6 Nm
  Stripping Length: 6-7.5 mm, 0.24-0.30 in