ICP DAS USA I-7521, User Manual

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I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
140
Application 8: Multiplex Control (Master type)

Refer to Applications 1 and 2 for more information

The onboard DO of the I-7521 module can directly drive a relay. The
onboard DI can be linked to photo sensors to allow for event triggering.
The I-7521+DN-PR4 can be triggered by a photo-sensor and can control
the multiplex to select the expected analog signal

All control operations are performed in the I-7521 module. The Host PC
is able to read the 3-channel A/D signals without requiring the multiplex
control

Refer to the 7521ODM4.c file for the source code of the firmware
I-7521
(#01)
photo sensor
D/I
DN-PR4
D/O
A/I
I-7520
RS-485
photo sensor
D/I
DN-PR4
D/O
A/I
I-7521
(#AA)
RS-232
device
RS-232
device
RS-232