Inputs and Outputs

The UAC28-IP is equipped with 28 inputs and outputs:

• 12 universal inputs,

• 4 digital inputs,

• 6 analog outputs,

• 6 digital outputs.

Universal Inputs

The UAC28-IP device is equipped with 12 universal inputs.

Universal inputs support four types of input signals:

• voltage (0-10 V DC, input impedance 100 kΩ);

• current (0-20 mA);

• resistance and temperature measurement (10k thermistor, a full list of supported temperature sensors is available here: List of Supported Temperature Sensors);

• dry contact (output current 1 mA).

Universal Input Voltage Connection

Universal Input Current Connection

Current measurement is realized by voltage measurement and 200 Ω resistance. According to Ohm’s law, the current is directly proportional to the voltage, and the resistance is the constant of proportionality. (I = U / R). According to the Ohm’s law equation, for 20 mA current with 200 Ω resistance the output voltage is 4 V. It means that the 4 V voltage measured on the universal input corresponds to 20 mA current. The result is expressed in millivolts.

Universal Input Resistance Connection

Universal Input Dry Contact Connection

Digital Inputs

The UAC28-IP device is equipped with 4 digital inputs.

Digital inputs operate as standard dry contact inputs and, additionally, as high speed pulse counters up to 100 Hz.

Digital Input Counter

A digital input can work as a counter of dry contact pulses up to 100 Hz. The connection is identical as in case of the dry contact input.

Analog Outputs

The UAC28-IP is equipped with 6 analog outputs.

Analog outputs provide a 0-10 V DC output with maximum load up to 20 mA. They support three types of output signals:

• voltage (0-10 V DC) with maximum load up to 20 mA;

• digital;

• Pulse Width Modulation (PWM): 0.01 Hz, 0.1 Hz, 1 Hz, 10 Hz, 100 Hz.

Analog Output Voltage Connection

Analog Output Relay Connection

Analog Output Actuator Connection

Digital Outputs

The UAC28-IP device is equipped with 6 digital outputs.

Digital outputs operate as relay outputs with maximum loads of:

• resistive load: 3 A at 230 V AC, and 3 A at 30 V DC;

• inductive load: 75 VA at 230 V AC and 30 W at 24 V DC.

Digital Output Electrovalve Connection

Digital Output Resistive Load Connection

Digital Output Inductive Load Connection