Technical Manual 5050 / MAN000539 Page 24/92
Epec Oy reserves all rights for improvements without prior notice
Epec Oy Postiosoite/Postal address Puhelin/Phone Fax Internet
Tiedekatu 6 PL/P.O.Box 194 +358-(0)20-7608 111 +358-(0)20-7608 110 www.epec.fi
FIN-60320 Seinäjoki FIN-60101 Seinäjoki, Finland
4.3.4 PWM/DO/DI/CM_Type008
Output (PWM/DO)
• This type of pin is a current sourcing output with a current and voltage measurement
features (the pin connects the load to a positive supply voltage through the shunt resistors).
• These outputs have a switching element called a smart FET. It has integrated features to
protect itself and also the external pin, wiring and actuator.
• These outputs are capable of generating pulse width modulated (PWM) output signals.
• When used as an output, the input feature indicates the output FET's state
Before the supply voltage can be connected to an output pin, the related power
switch must be switched on as well.
The FET outputs are grouped into pairs:
• The maximum continuous current for a single output in the pair is 2,5 A.
• The maximum continuous current for the pair is 4 A.
The pairs are indicated with upper case characters in the pin table's Group column
Input (DI/AI)
• This pin can be used as a digital input (DI)
• A pin of this type can also be used as an input by using the output state monitoring feature.
• In this case, the output functionality of the pin must be kept in the off state.
• These pins may also be used as analog inputs (AI)
• It must be taken care in system design that the output unintentionally switching to on state
causes no harm to the system.
• It’s highly recommended to use closed loop connections when the output pin is used as an
input. By keeping this simple principle in mind, will help avoid problems later on.
Voltage measurement
• When the pin is used as an output, the application can control the voltage with
the voltage measurement feature
• When the pin is used as an input, the application can measure the input voltage
level
The measured voltage must not exceed the operating voltage!
Current measurement
• When the pin is used as an output, the application can control the current with
the current measurement feature
• The firmware limits the maximum current to 2,5 A (when the current exceeds the
value more than 200 ms, the output is switched off)
To Next Page
