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F.8 DAISY CHAIN OPERATION
Up to 8032’s may be ”daisy chained” together using a common RESET and CLOCK control
line. This may be advantageous in situations where either there are not enough control ports
available on the Micro-800/MICRO-1000 datalogger for the number of multiplexers desired, or
to reduce the number of cables required to implement a large multichannel system.
SW1 located on the Terminal Block side of the circuit board determines the address of each
multiplexer and the corresponding signal channels. As many as 256 two conductor channels or
128 four conductor channels may be accessed per RESET line.
SW1 Setting
Channels Accessed
2
3
4
OFF
OFF
OFF
1-32 (32 channel mode) , 1-16 (16 channel mode)
DEFAULT MUX1
OFF
OFF
ON
33-64 (32 channel mode) , 17-32 (16 channel mode)
MUX2
OFF
ON
OFF
65-96 (32 channel mode) , 33-48 (16 channel mode)
MUX3
OFF
ON
ON
97-128 (32 channel mode) , 49-64 (16 channel mode)
MUX4
ON
OFF
OFF
129-160 (32 channel mode) , 65-80 (16 channel mode)
MUX5
ON
OFF
ON
161-192 (32 channel mode) , 81-96 (16 channel mode)
MUX6
ON
ON
OFF
193-224 (32 channel mode) , 97-112 (16 channel mode)
MUX7
ON
ON
ON
225-256 (32 channel mode) , 113-128 (16 channel mode)
MUX8
Daisy chain Operation/Channels Accessed
The example on the next page is a schematic representations of the daisy chain configuration
with multiplexers configured for 32 channels. This example shows three multiplexers sharing the
same control ports, and a single cable is used to interconnect them.
