Carel srl: pCO Stage Controller
page 26
Connection between terminal unit and main board
The connection between the terminal and the main board is performed by means of a 6-way telephone cable
supplied by Carel.
The connection is carried out by plugging the telephone connector
into the terminal J19 of the main board and into the terminal B of
the terminal unit. Plug the connector thoroughly into the terminal
until a click is heard.
To unplug the connector, push gently the prominent plastic tab and
remove the cable.
Carel serial connection have three different lengths:
S90CONN002: length 0.8 m
S90CONN000: length 1.5 m
S90CONN001: length 3 m
The main board can operate also in the absence of the terminal
unit; do not disconnect and then connect the terminal to the
main board before about 5 seconds have elapsed (if the
operation is carried out when the unit is ON).
Installation of EPROM
Before connecting / disconnecting the EPROM, power off the pCO board. For a proper functioning of the system, the
EPROM must be connected into its socket on the main board, keeping a correct alignment of the notch on the
surface of the EPROM with the corresponding notch on the socket.
To be sure, check that the glazed side of the EPROM coincide with the glazed side of the socket or with the
reference notch serigraphed on the board.
Connect the EPROM to the corresponding main board socket so that all the pins are properly inserted into their
seats.
Fig. 27 Position of the EPROM
When removing the EPROM do not touch the SMD electronic components mounted on the board in the
internal space of the socket.
Caution: using the EPROM and the pCO main board
Electrical damages of the electronic components are usually due to electrostatic charges induced by the user.
The utmost care is needed when using these components, and particularly:
•
before handling any electronic component or card, touch a ground reference (avoiding to touch the materials is
not enough, as a discharge of 10000 V, a common event in the presence of static electricity, causes an arc of about
1 cm)
•
materials should be left as long as possible inside their original packaging. If it is necessary to take a main board
from a packaging, transfer the product into an antistatic packaging without touching the back side of the board
with the hands
•
absolutely do not use plastic bags, polystyrene or non-antistatic sponges
•
take out of the original antistatic packaging one EPROM at a time
•
do not touch the pins of the EPROM.
A
B
cable
Terminal unit
Main board
Fig. 26
Notches of
reference