ICP DAS USA I-7521 User Manual page 5

ICPDAS I-752N products are unique. In that they are Master-type
converters, while most other converters are Slave-type, which are
helpless without a Host PC. In real industrial applications, many users
are not satisfied with Slave-type converters as they cannot be adapted
to individual requirement. The powerful I-752N series analyzes the DI /
DO of local RS-232 devices without the need for a Host PC. Refer to
Applications 7~9 in Sec.6.2 for more information.
Onboard 1Kb Queue buffer
I-752N series modules are equipped while a 1Kb queue buffer for its
local RS-232 device. All input data can be stored in the queue buffer
until the Host PC has time to read it. These features allow the Host PC
to be linked to thousands of RS-232 devices without any loss of data.
(Refer to Sec.5.3.30)
Onboard DI signal trigger
I-752N series modules are equipped with 1/2/5 DI channels for sensor
interfacing. These DI channels are linked to a photo sensor/switch to
act as a signal. They also can be used as general purpose DI. I-752N
series modules provide ODM and applicatin demos for a user to
modify them to read and analyze these DI signals without the need for
a Host PC.
Onboard DO channels for emergency control
I-752N series modules equipped with 1/3/5 DO channels for
emergency control. The DO channels can directly drive either relay or
an LED, and can be used to control the local devices in the event of an
emergency. I-752N series modules provide ODM and applicatin
demos for a user to modify them to control these DO channels without
the need for a Host PC.
3000V isolation on the RS-485 side
I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User's Manual,Ver2.5 Aug.2015
5