Nice PP7124, Instructions And Warnings For Installation And Use

22 

– ENGLISH

FURTHER INFORMATION 

(Accessories)

9

9 

FURTHER DETAILS (Accessories)

9.1  ADDING OR REMOVING DEVICES

Once the automation has been assembled, it is possible to add 

or remove devices at any time. In particular, various types of de-

vices can be connected to the “

BlueBUS

” and “

STOP

” inputs, 

as described in the following paragraphs.

m 

After having added or removed devices, these must 

be learned as described in the “Learning of other 

devices” paragraph.

9.1.1 BlueBUS

BlueBUS is a technique that allows for connecting compatible 

devices with only two wires which carry the electrical power and 

the communication signals. All devices are connected in paral-

lel on the same 2 BlueBUS wires and without having to observe 

the polarities; each device is recognised because it is assigned 

a univocal address during the installation phase.

The following devices can be connected to the BlueBUS: photo-

cells, safety devices, control buttons, signalling lights, etc. The 

control unit recognises all the connected devices individually 

through an appropriate learning phase, and can detect all pos-

sible anomalies with absolute precision.

For this reason, whenever a device is connected to or removed 

from BlueBUS, the learning phase must be carried out on the 

control unit, as described in the “

Learning of other devices

” 

paragraph.

9.1.2 STOP input

STOP is the input that causes immediate stoppage of the ma-

noeuvre followed by its brief reversal. Devices with output fea-

turing normally open “NO” and normally closed “NC” contacts, 

as  well  as  devices  with  8.2  kΩ  fixed  resistor  output,  such  as 

sensitive edges, can be connected to this input.

As with the BlueBUS, the control unit recognises the type of 

device connected to the STOP input during the learning phase 

(see the “

Learning of other devices

” paragraph); subsequent-

ly the control unit gives a STOP command when it detects a 

variation with respect to the recognised status.

Multiple devices, even of different types, can be connected to 

the STOP input if suitable arrangements are made:

–

Any number of NO devices can be connected to each other 

in parallel.

–

Any number of NC devices can be connected to each other 

in series.

–

Two devices with 8.2 kΩ fixed resistor output can be connect-

ed in parallel; if there are more than 2 devices then they must 

all be connected in cascade, with a single 8.2 kΩ terminating 

resistor.

–

It is possible to combine two NO and NC contacts by placing 

them in parallel, while also mounting a 8.2 kΩ resistor in series 

with the NC contact (this also allows for combining 3 devices: 

NA, NC and 8.2 kΩ).

a 

If the STOP input is used to connect devices with 

safety  functions,  only  those  devices  with  8.2  kΩ 

fixed resistor guarantee Category 3 safety against 

faults in accordance with the EN 13849-1 standard.

9.1.3 Photocells

To allow the control unit to recognise the devices connected 

through  the  “BlueBUS”  system,  these  devices  must  be  ad-

dressed.

This operation can be carried out by correctly positioning the 

electrical jumper present in each device (also refer to the in-

struction manual of each device). Shown below is an address-

ing diagram for photocells, based on their type.

FOTO 1

FOTO

FOTO II

FOTO 1 II

FOTO 2 II

FOTO 2

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Table 10

PHOTOCELL ADDRESSES

Photocell

Position of the 

jumpers

FOTO (PHOTO)

External photocell h = 50 activated during 

the closing phase (stops and reverses the 

gate’s movement)

FOTO II (PHOTO II)

External photocell h = 100 activated 

during the closing phase (stops and 

reverses the gate’s movement)

FOTO 1 (PHOTO 1)

Internal photocell h = 50 cm with 

activation both during closing (stops 

and reverses the movement) and during 

opening (stops and restarts when the 

photocell disengages)

FOTO 1 II (PHOTO 1 II)

Internal photocell h = 100 cm with 

activation both during closing (stops 

and reverses the movement) and during 

opening (stops and restarts when the 

photocell disengages)

FOTO 2 (PHOTO 2)

Internal photocell triggered during the 

opening phase (stops and reverses the 

gate’s movement)

FOTO 2 II (PHOTO 2 II)

Internal photocell triggered during the 

opening phase (stops and reverses the 

gate’s movement)
FOTO 3 (PHOTO 3)

CONFIGURATION NOT ALLOWED

m 

At the end of the installation procedure, or after 

photocells or other devices have been removed, the 

learning procedure must be carried out (see para-

graph “Device learning“).