Table of Contents
Advertisement
• External protection units
The EP104 has a function to test external protection units. The test is run before every operation to ensure there are no
problems with the safety edge unit. Only one safety edge unit with external testing can be connected to each safety edge input.
To satisfy the safety requirements, the connected unit must have at least performance level C (PLc) in "EN ISO 13849-1
Safety of machinery - Safety-related parts of control systems". If the connected unit is a category 2 device, its test input must
be connected to the test output of the EP104 (terminal 38). Note that the test output of the EP104 is connected to GND,
+24V or set to high impedance (open), which can permanently damage units that are not designed to handle this. If a number
of units are used, they are all connected to the common output signals for testing. Check with the unit manufacturer that this
is permitted.
The EP104 is supplied without testing of the external protection unit for safety edges or photocells activated. When using
external testing, activate by setting channels C102, C103, C113, C123, C133, C343, P643. See channel list for specific
settings.
Note that the factory setting of channel C102 is 0. To test external protection units, set C102 according to the instructions
!
of the manufacturer of the external protection unit.
Settings for external protection
Before changing the other settings, you will need the following information about the unit to be tested.
•
Check supply voltage to which the unit will be connected.
•
Check the required current – the maximum current for the 24 VDC of the EP104 is 300 mA, so an external
transformer may be needed depending on what other equipment is connected.
•
Check whether the external unit has an internal resistor at the output. If not, fit a 8.2 kohm 0.5 W resistor to the
output. FAAC recommends that this input should be short-circuited when the protection is activated.
•
Check the active and inactive levels of the test input on the unit. Set C102 to the right polarity.
•
Check that the resistance read off in the EP104 for the safety edge input to which the external unit is connected is
correct.
•
Check the resistance of the output of the unit when the test input is activated. Enter this into C103.
•
Specify to which input, S.E1, S.E2, S.E3 or PHOTO, the external protection unit is to be connected. This is done
via channels C113, C123, C133, C343 and P643.
C102, controls how the test output works when external units are used with the test input according to the channel
reference.
C103, indicates the resistance the safety edge inputs must have when the test signal is active. The procedure is the same for
all inputs. For the photocell the voltage level is low and cannot be adjusted.
Make sure the system is serviced twice a year, even if external protection is used with daily function testing. Note that
!
the test input only tests the external unit – not the safety edge/photocell connected to the unit.
22
DAAB AUTOMATIC CONTROL UNIT EP104
Bruksanvisning utgåva 1 för Programversion 4.06
Advertisement
Table of Contents
