Download Now

Enter your information or login to view the document.

Intelligent Communication Controller with one RS-485 port, one RS-232 port and one RS-422 port. Supports operating temperatures between -25 to 75°C.


Intelligent Communication Controller with one RS-485 port, one RS-232 port and one RS-422 port. Supports operating temperatures between -25 to 75°C.

  Price:  $349.00  

Fastest Delivery: (Details) X Delivery Details
We ship via UPS and fastest delivery is with Next Day Air. UPS Next Day Air Early typically gets their product to them as early as 8am, Next Day Air gets their product typically there by 10:30am and Next Day Air Saver typically by 3pm. We ship same day for in stock items and the lead time is up to one week for out of stock items. Delivery is dependent on UPS and your shipping method.


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-752N 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 1Kb Queue buffer
The I-752N modules are equipped whith 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.

Onboard DI for event trigger
The I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 are equipped with 2/2/5/1/1/1 digital input channels for sensor interfacing. These DI channels are linked to a photo sensor/switch to act as a event trigger signal. They also can be used as general purpose DI. The I-752N modules can read and analyze these DI signals without the need for a Host PC.

Onboard DO channels for emergency control
The I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 are equipped with 3/1/5/0/1/1 digital output 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. The I-752N modules can control these DO channels without the need for a Host PC.

3000V isolation on RS-485 side
COM2 of the I-752N 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.The advanced technology which makes this possible is covered.

Can be used as Addressable RS-485 to RS-232 Converter
Most RS-232 devices don't support device addressing. The ICPDAS I-752N series assigns a unique address to any RS-232 device installed on an RS-485 network. When the Host PC sends a command with a device address to the RS-485 network, the destination I-752N module will remove the address field, and then pass the other commands to its local RS-232 devices. The response from the local RS-232 devices will be returned to the Host PC via the I-752N.

Master-type Addressable RS-485 to RS-232 Converter
ICPDAS I-752N products are unique. In that they are Master-type converters which use our R.O.C. Patent 086674, 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 local RS-232 devices,DI and DO without the need for a Host PC. Refer to Applications 5~9 on pages 31~34 for more information.

Can be used as an Embedded Controller
In addition to Intelligent Communication Controller functions, I-752N modules can also be used as an embedded controller. Each I-752N controller includes the MiniOS7 embedded operating system, which provides the equivalent functions of ROM DOS and has more features. A variety of professionally developed libraries and demo programs can be implemented on the 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.


  • CPU: 80188
  • 20MHz; for I-7521/7522/7523
  • 40MHz; for I-7524/7527
  • SRAM:
    • 128K bytes for I-7521/7522/7523
    • 256K bytes for I-7524/7527
  • Flash ROM:
    • 256K bytes for I-7521/7522/7523
    • 512K bytes for I-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-7524/7527:
      14-pin screw terminal block ( accepts 16~22 AWG wires ); 3.5mm pitch
  • D/I: 3.5V~30V
  • D/O: 150mA/30V
  • Accessories: One download cable, one mini screw driver
  • Din Rail Mount
  • Environment:
    • Operating temperature: -25°C to +75°C
    • Storage temperature: -40°C to +80°C
  • 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)
    • Selection Guide

    Model Number I-7521/7521D
    I-7522/7522D I-7523/7523D I-7524/7524D I-7527/7527D
    CPU (80188) 40M 40M 40M 40M 40M
    SRAM 156k 156k 156k 156k 156k
    Flash 256k 256k 256k 256k 256k
    COM 1 Port
    Program download
    COM 2 Port RS-485(Note3)
    RS-485(Note3) RS-485(Note3) RS-485(Note3) RS-485(Note3)
    COM 3 Port - RS-422(Note4)
    RS-232(Note4) RS-232(Note4) RS-232(Note5)
    COM 4 Port - - RS-232(Note5) RS-232(Note4) RS-232(Note5)
    COM 5 Port - - - RS-232(Note4) RS-232(Note5)
    COM 6 Port - - - - RS-232(Note5)
    COM 7 Port - - - - RS-232(Note5)
    COM 8 Port - - - - RS-232(Note5)
    D/O 3 1 - - -
    D/I 3 3 2    
    User defined I/O 3 - - - -
    Real Time Clock - - - Y Y
    Embedded O.S. MiniOS7 MiniOS7 MiniOS7 MiniOS7 MiniOS7
    Note1: RS-232 /RS-485
    • RS-485: D2+, D2-; Self-tuner inside
    • RS-232: TXD, RXD, RTS, CTS
    DB-9 male connector

    Note2: RS-232 / RS-485
    • RS-485: D1+, D1-; Self-tuner inside
    • RS-232: TXD, RXD, RTS, CTS

References and Support

Customer Reviews (0)

Be the first to leave a review.

Recently Viewed Items


Write a Review




Rating: out of 5 Stars
Review (max 1000 characters)

characters left