Siphon or interlock between two gates or between a gate and a barrier
Safety buffer connection
• Resistors must always be placed in safety circuits to enable the system to fail safe.
• The resistance value must be 2kΩ with 1% tolerance and power resistance at least ½W.
There is a built in safety buffer monitor on the board which functions with both mobile and static safety
buffers. The EP102 monitors itself by an autotest, which takes place before each start and after every
stop. An error message is received if there is a fault. A 2.0KΩ resistor must be installed in the safety
buffer circuit. The principal of the safety system is that this resistance is measured and any variation
from this standard signals an alarm.
When mechanical switching type buffers are used, resistors must be connected in series with buffer.
If more than one DAAB type safety buffer is connected, these should be connected in parallel, and the
number of buffers set in the control panel. If more than one resistance switching buffer is used, these
can be connected in parallel, and the number of buffers set in the control panel. If resistance
switching buffers are connected in series, use only one final resistor. See drawings below for details.
DAAB mechanical switching type safety buffer.
3
2
2,0k
Red
Black
Solid state (resistance switching) safety buffer
series connection.
2,0k
Control panel
Connection between two DAAB panels
To ensure correct communication between two DAAB panels it is important to take note of the
following:
• Choose a twisted two-core screened cable.
• Cable size should not be less 0,2mm
2,
• Choose a low capacitance cable with capacitance 50-70 µF/m.
• Check the polarity.
• We recommend cable FKAR-PG, E 01 721 20.
•
EP102 EP102
31 32 31 32
1 2 21
Solid state (resistance switching) safety
buffer parallel connection.
Control panel
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