ICP DAS USA I-7521 User Manual page 6

COM2 of the I-7521/I-7522/I-7523 modules is an isolated RS-485 port
with 3000V isolation, which will protect the local RS-232 devices from
transient noises coming from the RS-485 network.
Self-Tuner ASIC inside
The interned I-752N Self-Tuner ASIC for the RS-485 port can auto
detect and control the send/receive direction of the RS-485 network,
meaning that there is no need for application programs to be
concerned about direction control of the RS-485 network.
A Wide range available for selection
RS-232
I-7521(D)
I-7522(D)
1
I-7523(D)
2
I-7522A(D)
I-7524(D)
3
I-7527(D)
6
Note: I-752N means any one of seven kinds of modules above.
Order Information

Order item choice
Order item
I-7521(D)
I-7522(D)
I-7523(D)
I-7522A(D) Intelligent communication controller
I-7524(D)
I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User's Manual,Ver2.5 Aug.2015
RS-232/
RS-485
RS-485
1 1
1 1
1 1
1 1
1 1
1 1
Module name
Intelligent communication controller
(1 channel of RS-232)
Intelligent communication controller
(2 channel of RS-232)
Intelligent communication controller
(3 channel of RS-232 )
(1 channel of RS-232 and 1 channel
Of RS-422/485)
Intelligent communication controller MiniOS7
RS-422/
DI
RS-485
2
2
1
1 5
1
1
DO
3
1
0
5
1
1
O.S
MiniOS7
MiniOS7
MiniOS7
MiniOS7
6