7
GB
PHOTO, PHOTO1 and PHOTO2 connections (The auxiliary
input AUX must be programmed as PHOTO2)
2.3.6) Examples of photocell connections with
the phototest function.
The programmable PHOTO-TEST function is a feature on the POA1
control unit (this function is not activated initially). This is an excellent
solution as regards the reliability of safety devices and places the
control unit and safety devices in “Category 2” of UNI EN 954-1
standard (ed. 12/1998). The safety devices are checked whenever a
manoeuvre is started, and will only begin if everything is in order.
This is only possible using a special configuration of the safety device
connections. The “TX” photocell transmitters are basically powered
separately from the “RX” receivers.
When the phototest is activated, the FOTO, FOTO1 and FOTO2 inputs will
be subjected to testing. If one of these inputs is not being used, it must be
connected to terminal n°8. Please consult the following figures for examples
of connections.
Connecting the PHOTO photocell only.
PHOTO and PHOTO1 connections
PHOTO, PHOTO1 and PHOTO2 connections (The auxiliary
input AUX must be programmed like PHOTO2)
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