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Isolated RS-232 to RS-485 Converter
113306 - I-7520 CR
New product
The ICP DAS I-7520 CR is an industrial converter designed to convert serial RS-232 signals to RS-485, providing a simple and reliable connection between equipment using different serial interfaces.
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ICP DAS I-7520 CR
The ICP DAS I-7520 CR is an industrial converter designed to convert serial RS-232 signals to RS-485, providing a simple and reliable connection between equipment using different serial interfaces.
It is particularly suitable where an RS-232 port on an industrial computer, PLC or other controller needs to communicate with devices installed on an RS-485 network.
RS-485 technology overcomes many of the limitations of RS-232, particularly in terms of transmission distance, networking capability and resistance to electromagnetic interference, making the I-7520 CR suitable for industrial and distributed systems.
Why Choose the ICP DAS I-7520 CR?
The I-7520 CR makes it possible to create long-distance industrial serial communication using conventional hardware equipped with RS-232. Conversion is transparent, simplifying integration without significant changes to existing hardware or software.
More Stable RS-232 to RS-485 Communication
RS-232 ports are widely used on industrial computers, controllers and automation equipment. However, they are generally intended for point-to-point communication over relatively short distances.
RS-485 uses differential signalling, providing improved electrical noise immunity and significantly greater transmission distances. The I-7520 CR performs this conversion transparently.
The specified maximum distance is 1,200 m at 9.6 kbps and 400 m at 115.2 kbps using Belden 9841 2P cable. Actual transmission distance may vary depending on cable, installation, communication speed and network conditions.
Isolation and Protection for Increased Reliability
The I-7520 CR provides 3000 VDC isolation on the RS-232 side, helping protect connected equipment against potential differences, ground loops and other undesirable electrical conditions in industrial installations.
RS-485 is also particularly suitable for industrial environments because differential signalling provides improved robustness against electromagnetic interference.
Self-Tuner ASIC – Automatic RS-485 Control
The integrated Self-Tuner ASIC automatically controls RS-485 transmission direction. This simplifies installation and eliminates the need for additional manual control of communication direction.
Typical Applications
Technical Specifications
| Model and Communication | |
| Model | I-7520 CR |
| Function | RS-232 to RS-485 Converter |
| RS-232 | TxD, RxD, GND |
| RS-485 | DATA+, DATA- |
| Baud Rate | 300 to 115200 bps |
| Self-Tuner ASIC | Yes |
| Distance at 9.6 kbps | Max. 1,200 m |
| Distance at 115.2 kbps | Max. 400 m |
| Isolation and Protection | |
| Isolation | 3000 VDC on RS-232 side |
| ESD Protection | Yes |
| Connections | |
| RS-232 Connector | 9-Pin Female D-Sub |
| RS-485 Connector | Removable 10-Pin Terminal Block |
| LED Indicators | Power / Communication |
| Power | |
| Input Voltage | +10 VDC to +30 VDC, non-isolated |
| Power Consumption | 1.2 W |
| Mechanical | |
| Casing | Plastic |
| Dimensions | 72 × 35 × 118 mm |
| Installation | DIN-Rail Mounting |
| Environment | |
| Operating Temperature | -25 °C to +75 °C |
| Storage Temperature | -30 °C to +75 °C |
| Humidity | 10 to 90% RH, non-condensing |
ICP DAS I-7520 CR FAQ
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