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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 two 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-7521/22/23 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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» Features
● The COM 1 of the I-7521, I-7522,I-7522A, I-7523, I-7524 and I-7527can be used as
RS-232 port or RS-485 port
● The COM1 can be used to download program.
● Built-in “Addressable RS-485 to RS-232 Converter” firmware
● Support about 30 well-defined commands
● Support Dual-Watchdog commands
● Support Power-up value & safe value for D/O
● The source code of firmware is open & well-document
● User can modify the source code according to his special requirement.
● The firmware can real-time monitor the onboard D/I and control the onboard D/O according
to user’s requirement
● The firmware can real-time monitor the RS-232 device and control the onboard D/O according
to user’s requirement
● 7521 support one RS-232 device
● 7522 support two RS-232 devices
● 7522A support one RS-232 and one RS-422devices
● 7523 support three RS-232 devices
● 7524 support four RS-232 devices
● 7527 support seven RS-232 devices
● Watchdog timer provides fault tolerance and recovery
● Low power consumption
● R.O.C. Invention Patent No. 086674, No.103060, No. 132457
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» Specifications
● CPU : 80188
20M Hz; for I-7521/7522/7523
40M Hz; for I-7522A/7524/7527
● SRAM :
128K bytes for I-7521/7522/7523
256K bytes for I-7522A/7524/7527
● Flash ROM :
256K bytes for I-7521/7522/7523
512K bytes for I-7522A/7523/7524/7527
● EEPROM : 2048 bytes
Communication speed: 115.2K BPS max.
● RS-232 interface connector: Male DB-9
● RS-485 interface connector for I-7521/7522/7523: 13-pin screw terminal block
( accepts 16~26 AWG wires ); 3.81mm pitch
● RS-485 interface connector for I-7522A/7524/7527: 14-pin screw terminal block
( accepts 16~22 AWG wires ); 3.5mm pitch
● D/I : 3.5V ~ 30V
● D/O : 100mA/30V
● Accessories : One download cable, one mini screw driver
● Operating temperature : -25℃ to +75℃
● Storage temperature : -40℃ to +80℃
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» Command Sets
● Note3 : RS-485 ( D2+, D2- ; self-tuner inside);
● 3000V isolation
● Note4 : RS-232 (TXD, RXD, RTS, CTS )
● Note5 : RS-232 ( TXD, RXD )
● Dimensions : 123mm x 72mm x 33mm
● Power requirement : Unregulated 10~30 VDC with protection from power reversals
● Power consumption : 2W (without display)
3W (with display)
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» Applications
● Factory Automation
● Building Automation
● Home Automation
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» Ordering Information
| I-7522A |
Embedded communication controller with one RS-485, one RS-422 and one RS-232 |
| I-7522AD |
I-7522A with seven segment display |
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» Optional Accessories
PWR-24/110  |
wall-plug power Adapter / 110VAC, 60Hz, 2.4W |
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PWR-24/220F |
wall-plug power Adapter / 220VAC, 50Hz, 2.4W |
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KA-52F |
Wide range power Adapter / 100-250 VAC, 50-60Hz, 25W |
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DIN-KA52F |
KA-52F with DIN-RAIL Mounting Adaper |
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