Operating Voltage:24 V DC
Current Consumption:≤ 100 mA per channel
Number of Channels:16 digital inputs / 16 digital outputs
Communication Interface:RS-485
Operating Temperature Range:-25°C to 60°C
Enclosure Type:IP20
Dimensions (mm):100 x 100 x 100
Weight:0.5 kg
The HOLLYSYS SM3330 Terminal I/O Block is a versatile component designed to enhance the performance of industrial control systems. Its robust design and advanced features make it suitable for a wide range of applications in manufacturing, process control, and automation industries.
Featuring a modular architecture, the SM3330 allows for easy expansion and customization, ensuring that your system can adapt to evolving requirements without significant downtime or costly reinstallation.
With an operating voltage of 220 V AC and a high input/output capacity, this block is capable of handling demanding industrial environments. Its compatibility with MODBUS RTU protocol ensures seamless communication with other devices in your network.
Engineered for durability and reliability, the SM3330 is rated IP65, which means it can withstand harsh environmental conditions including dust and water splashes. This makes it ideal for use in outdoor or industrial settings where dust and moisture are concerns.
In addition, the SM3330 Terminal I/O Block consumes a maximum of 10 watts of power, making it energy-efficient and cost-effective for long-term operation. It supports up to 8 input channels and 4 output channels, providing ample flexibility for complex system configurations.

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