UN 321-1BH02-0AA0, UNIMAT, digital input module SM321, 16DI, 24 V DC, NPN, UN300

UN 321-1BH02-0AA0 Unimat – digital input module SM321, 16DI, 24 V DC, NPN, UN300

UN 321-1BH02-0AA0 is a digital input module of the UN300 series with 16 NPN inputs 24 V DC. It is a component of the series UniMAT UN300 designed for industrial control systems, machine modernisation, switchboards and distributed I/O assemblies.

The product is suitable for sensing the digital states of sensors, push buttons, limit switches and other binary signals in machine automation. When choosing, it is important to compare the full order number, number of channels, signal type, supply, connector and the parameters of the specific PLC project.

Typical applications

Sensing the digital states of sensors, push buttons, limit switches and other binary signals in machine automation. The module can be used when building a new control system as well as when servicing and modernising existing automation, provided the electrical and system parameters meet the application requirements.

Technical specifications

Wiring and integration into the PLC assembly

The module is designed for 24V DC NPN digital input signals. When wiring, the polarity, common potential and compatibility of the sensors used must be verified. The manufacturer specifies galvanic isolation of the input channels from the backplane bus.

Compatibility and choosing a replacement

UniMAT lists the module in the UN300 series for S7-300. architecture applications. For a correct replacement, compare the NPN input type, number of channels, voltage level and 20-pin front connector.

When replacing an existing module, a similar name is not enough. Compare the full order number, number and type of I/O, voltage and current levels, resolution, connector, wiring, parameterisation and support in the PLC configuration used.

Official UniMAT documentation

• Official UniMAT product page / source for UN 321-1BH02-0AA0
• Official UniMAT UN Series PLC catalogue and selection guide

Frequently asked questions

Co je UN 321-1BH02-0AA0?

This is a digital input module SM321 of the UniMAT UN300 series in the version 16DI, 24 V DC, NPN.

Where is this module used?

Typically for sensing the digital states of sensors, push buttons, limit switches and other binary signals in machine automation.

What to watch out for when wiring?

Before connecting, verify the voltage level of the inputs and the sensor type. The specific terminals and common potentials must match the manufacturer's wiring diagram.

How do I verify the correct variant?

Compare the full order number UN 321-1BH02-0AA0, number of channels, signal type, supply, connector and PLC configuration. If any of these data differ, the replacement cannot be confirmed just by the appearance or name of the module.