This product is no longer available and has been replaced by: AM16/32B. Some accessories, replacement parts, or services may still be available.
AM16/32 16 or 32 Channel Relay Multiplexer
Services Available
Repair No
Calibration No
Free Support No


The AM16/32 increased the number of sensors that could be measured by a Campbell Scientific data logger. The AM16/32 sequentially multiplexed 16 groups of four lines (a total of 64 lines) through four common (COM) terminals. Alternately, a manual switch setting (switch is surrounded by red border in the image) allowed the AM16/32 to multiplex 32 groups of two lines (also a total of 64 lines) through two COM terminals. Depending on sensor type, the AM16/32 typically multiplexed 16, 32, or 48 sensors.



Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Data Loggers

Compatible Note
21X (retired)
CR10 (retired)
CR1000 (retired)
CR10X (retired)
CR200 (retired)
CR205 (retired)
CR205 (retired)
CR206 (retired)
CR23X (retired)
CR295 (retired)
CR3000 (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR800 (retired)
CR850 (retired)
CR9000 (retired)
CR9000X (retired) Although compatible, the AM16/32 does not support the CR9000X's fastest communication rates and therefore is not practical for most CR9000X applications.

Additional Compatibility Information

A series of data logger instructions control the AM16/32 operation (measurement instructions that are repetitive are generally contained within a programming loop; in CRBasic data loggers, this functionality is available in the SubScan instruction).

Short Cut software (available at no charge from our website) supports simple programming and generates wiring diagrams for AM16/32 applications; early versions of Short Cut did not support multiplexers.

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