5050 CONTROL UNIT
Technical Manual & Cabling Instructions
19.10.2012
Epec Oy reserves all rights for improvements without prior notice
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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 those cases the output functionality of the pin must be kept in 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
input. By keeping this simple principle in your mind you will avoid many unknown 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)
Electrical characteristics
Symbol Parameter Conditions Min Max
Units
R
Shunt
Shunt resistance
typ. 68 mΩ
I
o-range
Nominal Current
0 3,5 A
f
Cut-Off
Cut-off frequency
Output current
measuring
typ. 50 Hz
Iacc-zero
Offset error Calculated 'worst case'
I
acc-prop
Accuracy
Proportional factor
Calculated 'worst case'
I
o
Nominal Output
Current
Output On
(Note 6, 8)
0 2,5 A
I
o-lim
Internal current
limitation
Output On
(Note 7)
2,5 A
f
PWM
PWM Frequency
In current
measurement mode
50 200 Hz
In PWM mode
10 3000 Hz
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