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Introduction
There
are many RS-232 devices in industry applications. Nowadays it becomes
important to link all those RS-232 devices together for automation &
information. Usually those RS-232 devices are far away from the host-PC
& widely distributed in the factory. So it is not a good idea to use
multi-serial cards to connect all these RS-232 devices together. Our
I-752x series products can be used to link multiple RS-232 devices by
single RS-485 network. The RS-485 is famous for it¡¦s easy maintenance,
simple cabling, stable, reliable and low cost. When the user want to
connect RS-232 devices to 10BASE T, our I-7188EN can meet this demand.
Refer to I-7188EN literatures for further information.
Onboard
1K bytes Queue-buffer
The
I-752X equips 1K bytes queue-buffer for its local RS-232 device. So all
input data can be stored in queue-buffer until the host-PC has time to
read. These features will make the host-PC link thousands of RS-232
devices without lose any data.
Onboard
D/I for event trigger
The
I-7521 and I-7522 equip three digital input channels, while I-7523 equips
one digital input channel for sensor interface. These D/I can be
used to link with photo sensor/switch for event trigger. They also can be
used as general purpose D/I. The 752X can read & analyze these D/I
without the help of host-PC.
Onboard
D/O for emergency control
The
I-7521 equips three digital output channels, while I-7522 equips one
digital output channel for emergency control. The D/O can directly drive
relay or led. They can be used to control the local devices for emergency
event. The 752x can control these D/O without the help of host-PC.
3000V
isolation on RS-485 site
The
COM2 of the I-752x is an isolated RS-485 port with 3000V isolation. This
isolation will protect the local RS-232 devices from transient noises
coming from RS-485 network.
Self-Tuner
ASIC inside
The
I-752X equips a Self-Tuner ASIC for RS-485 port. This chip can auto detect
and control the send/receive direction of the RS-485 network. Therefore
the application programs don¡¦t have to take care of the direction
control of the RS-485 network. The advanced technology which makes this
possible is covered by R.O.C. Patent 103060, 132457.
Can
used as Addressable RS-485 to RS-232 Converter
Most
RS-232 devices don¡¦t support device address. The I-752X series can
assign a unique address to any RS-232 device installed in the RS-485
network. Host-PC can send command with device address to RS-485 network,
the destination-752x will remove the address field & pass the other
fields of command to its local RS-232 device. The response of this local
RS-232 device will be passed to host-PC via this destionation-752x.
Master-type
Addressable RS-485 to RS-232 Converter
Basically
our 752X products are Master-type converters. The 752X use our R.O.C.
Patent 086674. Other competitor¡¦s converter is Slave-type and can¡¦t
work stand alone without host-PC. In real industrial application, the
demand is different case by case and customers are not satisfied with
Slave-type. The 752x are very powerful and can analyze the local RS-232
device, D/I or D/O without host-PC. Refer to Application 5 to Application
9 for more information.
Can
be used as an Embedded Controller
Besides
Intelligent Communication Controller, the I-752X series products can be
used as an embedded controller. Every I-752X controller has an, MiniOS7,
embedded O.S. . The MiniOS7 provides equivalent functions of ROM DOS
and has more features. The user can use well-developed libraries and demo
programs to implement his controller.
Can
be used as RS-485 to RS-232 Device Server
The
Device Server is an appliance that network enables any device with a
serial communication port. Our Intelligent Communication Controllers allow
those devices to become connected to the RS-485 network If the user want
to use Ethernet work, he can choose I-7188EN series products.
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