ICP DAS USA I-7521 User Manual page 138

Application 5: Real time DI Monitoring and DO Alarm (Master
type)
 Refer to Applications 1 and 2 for more information
 The I-7521 module will scan and analyze the onboard DI. If the DI shows
a match with the alarm states, the onboard DO will trigger the alarm
device to allow for alarm or safety control
 All DI and DO control operations are performed in the I-7521 module.
The Host PC only reads the DI and DO values as part of its system
monitoring function
 Refer to the 7521ODM1.c file for the source code of the firmware
RS-232
Application 6: Real time A/D Monitoring and D/A Control
(Master type)
 Refer to Applications 1 and 2 for more information
 An X301 daughter board supports a single A/D and a single D/A and can
be connected the I-7521 module. The I-7521+X301 combination can read
and analyze the A/D in real time. The D/A output is controlled based on
the A/D value
 All A/D and D/A control operations are performed in the I-7521 module.
The Host PC only reads the A/D and D/A values as part of its system
monitoring functions
 Refer to the 7521ODM2.c file for the source code of the firmware
RS-232
I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User's Manual,Ver2.5 Aug.2015
I-7520
I-7521
(#01)
DI
DO
RS-232 Device
I-7520
I-7521
(#01)
D/A
A/D
RS-232 Device
RS-485
I-7521
(#AA)
DI
RS-232 Device
RS-485
I-7521
(#AA)
A/D
RS-232 Device
DO
D/A
138