21
GB
7.3) Adding or removing devices
Devices can be added or removed at any time on an automation
using SPIN. In particular the inputs STOP and PHOTO can be con-
nected to various types of device as indicated in paragraphs “7.3.1
STOP Input” and 7.3.2 Photocells. The figure shows the wiring dia-
gram for connection of the various devices.
7.3.1) STOP input
STOP is the input that causes immediate shutdown of the move-
ment followed by a brief inversion of the manoeuvre. This input can
be connected to devices with contact types Normally Open (NO),
Normally Closed (NC) or devices with a constant resistance of
8.2KΩ, such as sensitive edges.
The control unit recognises the type of device connected to the
STOP input during the self-learning phase (see paragraph “4.2 –
Learning the door opening and closing positions”); after which a
STOP command is activated whenever a variation with respect to
the learned status is detected.
When set accordingly, more than one device can be connected to
the STOP input, also different from one another:
• Several NO devices can be connected in parallel with no limit to
number.
• Several NC devices can be connected in parallel with no limit to
number.
• Several devices with a constant resistance of 8,2KΩ can be con-
nected “in cascade” with a single terminating resistance of 8,2KΩ
• It is possible to combine two NO and NC contacts, placing them
in parallel, taking care to place a resistance of 8,2KΩ in series with
the NC contact (this also enables the combination of 3 devices:
NO, NC and 8,2KΩ).
If the STOP input is used to connect devices with safe-
ty functions, only the devices with a constant resistance
of 8,2KΩ guarantee safety category 3 against faults in
accordance with the standard EN 954-1.
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