The RAC18-IP is equipped with 18 inputs and outputs:
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4 universal inputs;
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4 digital inputs;
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3 analog outputs;
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5 digital outputs;
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2 triac outputs.
Universal Inputs
The RAC18-IP device is equipped with 4 universal inputs.
Universal inputs support four types of input signals:
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voltage (0-10 V DC, input impedance 100 kΩ);
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current (0-20 mA);
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resistance and temperature measurement (10k thermistor, a full list of supported temperature sensors is available here: List of Supported Temperature Sensors);
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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 RAC18-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 RAC18-IP is equipped with 3 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:
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voltage (0-10 V DC) with maximum load up to 20 mA;
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digital;
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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 RAC18-IP is equipped with 5 digital outputs.
Digital outputs operate as relay outputs with maximum loads of:
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resistive load: 3 A @ 230 V AC, and 3 A @ 30 V DC;
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inductive load: 75 VA for 230 V AC and 30 W for 24 V DC.
Digital Output Electrovalve Connection
Digital Output Resistive Load Connection
Digital Output Inductive Load Connection (DC)
Digital Output Inductive Load Connection (AC)
Triac Outputs
The RAC18-IP device is equipped with 2 triac outputs.
Triac outputs work as typical binary outputs or in Pulse Width Modulation (PWM) mode: 0,01 Hz, 0,1 Hz, 1 Hz, 10 Hz.
