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MOD485K
Chiller card serial interface
Fig.1
Fig.2
8
EN
DESCRIPTION
MOD485K
The
card is an accessory for the en re PCO3 control series (PCO3B
excluded), which allows the direct interface of an RS485 network. The card
provides the op cal isola on of the controller in rela on to the RS485 serial
net-work. The maximum achievable baud rate is 19200 baud (se able via so
ware).
ASSEMBLY
With reference to Figs. 1 ... 4, the connec on to the PCO3 is obtained following
this procedure:
1.
remove the "serial card" of the electronic controller with a screwdriver (see
Figure 1);
2.
with a pair of nippers, remove the plas c knockout sec on from the cover,
obtaining the opening for the 3-way connector (see Figure 2);
3.
insert the op onal card into the corresponding comb connector, taking care
that the card is correctly inserted and to is in contact with the two plas c
supports of the PCO3 container (see Figure 3);
4.
close the cover with a screwdriver, lining up the connector of the serial
card with the hole on the cover (Fig. 4).
The connec on to the RS485 network is obtained using the connector with
removable terminals on the card.
The meanings of the pins on the connector (Fig. 5) are indicated
by the serigraphy on the card and listed in Fig. 6.
If the card occupies the last posi on in the serial supervision line,
a termina ng line resistor with a value of 120 Ω - 1/4 W is connected
to the terminals of pins 2 and 3 as in the diagram of Figure 7.
Technical characteristics
Cable sec on:
Opera ng condi ons:
Storage condi ons:
Degree of pollu on:
Dimensions (mm)
Warnings. Care in handling the card
Electrical damage may occur on electronic components is almost always due to
electrosta c discharge caused by the operator. It is therefore necessary take suit-
able steps for these type of components, in par cular:
•
before handling any electronic component or card, touch a grounded ob-
ject (trying to avoid touching a component is not suffi cient as a discharge
of 10,000 V, which is quite easily achieved by sta c electricity, produces an
arc of about 1 cm);
•
the materials must remain in their original packaging as far as possible. If
necessary, remove the card from its package and place it in an an sta c bag,
without touching the back of the card with the hands;
•
the use of plas c, polystyrene or non an sta c bags should be strictly
avoided;
•
avoid at all cost the direct handling of the card from one operator to an-
other (to avoid electrosta c induc on and discharges).
EN
use AWG20/22 twisted two wire shielded
cable with a 2 mm sec ons at the terminals:
min. 0.2 - max. 2.5.
-10T60 °C; 90 % RH.
-20T70 °C; 90 % RH.
normal.
60x29x20, (60x29: terminal strip,
20: overall width of components).
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