Schneider Electric AS-B846-002 800 Series Analog Input Multiplexer

The Schneider Electric Modicon AS-B846-002 (ASB846002) is a 16-channel current input multiplexer module designed for the Modicon 800 Series I/O system. It acquires analog signals across 16 channels and routes them to a single shared analog output path to save PLC rack space and reduce conversion hardware costs.

Channel Multiplexing and Signal Conditioning

The module supports up to 16 current input channels, typically accepting standard 4-20 mA current loop signals. Channel selection is controlled via PLC register addressing, allowing sequential routing with a break-before-make switching behavior and rapid 3 ms channel response times.

Rack Integration and Mechanical Form Factor

Designed for installation into a single 800 Series I/O rack slot, the AS-B846-002 weighs approximately 2.45 lbs (1.11 kg). It interfaces directly with the backplane bus to draw its required 5 VDC power, maintaining reliable connection integrity within high-density control enclosures.

Frequently Asked Questions

Q: What is the main difference between the AS-B846-002 and the AS-B846-001 module? A: The AS-B846-002 is designed for current loop input signals (4 to 20 mA), whereas the AS-B846-001 model is configured for voltage input signals.

Q: How many PLC rack slots does this analog multiplexer occupy? A: The AS-B846-002 occupies a single slot within a standard Modicon 800 Series I/O rack.