ABB AI820 3BSE008544R1 Analog Input module

Type: Analog Input Module
Module:  AI820 3BSE008544R1
Number of Channels: 4
Signal Type: Bipolar differential
Current Input Ranges: –20…+20 mA, 0(4)…20 mA
Voltage Input Ranges: –10…+10 V, 0(2)…10 V
Under/Over Range: ±15%
Resolution: 14-bit plus sign
Input Filter (Rise Time, 0–90%): 40 ms
Error: Max. 0.1%
Dielectric Test Voltage: 500 V AC
Power Dissipation: 1.7 W
Maximum Field Cable Length: 600 m (656 yards)

The AI820 Analog Input Module has 4 differential, bipolar current/voltage inputs.  Each channel can be either a voltage or current input.  The current inputs can withstand an accidental maximum normal mode 30 V d.c. connection.  To protect the current input circuit against dangerous input levels, that is, by accidentally connecting a 24 V source, the resistor rating of the 250W current sense resistors is about 5 Watts.  This is intended only to temporarily protect one channel at a time.
The module distributes the external transmitter supply to each channel.  This adds a simple connection (with extended MTUs) to distribute the supply to external 2 wire transmitters.  There is no current limiting on the transmitter power terminals.
All 4 channels are isolated from the ModuleBus in one group.  Power to the input stages is converted from the 24 V on the ModuleBus.

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