Carel c.pCO, Руководство пользователя, Страница: 17 / 64

17
ENG
c.pCO sis tem a + 0300057EN re l. 1.2 - 29.05.2017
Electrical installation
Important: before servicing the equipment, disconnect the controller
from the power mains by moving the system main switch to OFF.
Make sure the system is provided with a power disconnector conforming to
regulations. Use cable lugs that are suitable for the terminals used. Loosen each
screw and insert the cable lugs, then tighten the screws. There is no limit to the
number of wires that can be connected to each individual terminal. When
tightening the terminal screws apply a tightening torque no greater than 0.6
Nm. For information on the maximum allowable length of the connections
to the analogue/digital inputs and to the analogue outputs please refer to
the “Technical Specifications” (chapter 12). In environments subject to strong
disturbance use shielded cables with the braiding bonded to the earthing
conductor in the electrical panel. After making the connection, gently tug on
the cables to make sure they are sufficiently tight.
Note:
•
secure the cables connected to the controller with clamps placed at
3cm from the connectors;
•
if the power transformer secondary winding is earthed, make sure
the earth conductor is bonded to the conductor that goes to the
controller and is connected to terminal G0. This applies to all the
devices connected to the controller through a serial network.
Important:
•
using a supply voltage other than specified can seriously damage the
system;
•
connect the fuse close to the controller;
•
the controller should only be installed, serviced and inspected
be qualified personnel and in compliance with national and local
regulations;
•
all the extra low voltage connections (24 Vac/Vdc or 28 to 36 Vdc
analogue and digital inputs, analogue outputs, serial bus connections,
power supplies) must have reinforced or double insulation from the
power mains;
•
avoid touching or nearly touching the electronic components
mounted on the boards to avoid electrostatic discharges from the
operator to the components, which may cause considerable damage;
•
do not press the screwdriver on the connectors with excessive force, to
avoid damaging the controller;
•
using the device in any way other than specified by the manufacturer
can compromise its protection;
•
use only optional boards and connectors supplied by Carel.
4.3 Preliminary operations
Installing the serial cards
If the Fieldbus and BMS serial cards built into the c.pCO are insufficient
for the required application, you can add a Fieldbus serial port and a BMS
serial port, which are available as accessories (see chap.1).
To install them, proceed as follows:
•
Locate the Fieldbus or BMS serial port.
•
using a screwdriver, take off the cover;
•
using a pair of nippers, cut out the plastic knock-out to create an
opening;
•
plug the optional card into the edge connector, making sure it is firmly
secured and makes contact;
•
put the cover back so that the serial card connector is aligned with
the opening;
•
make the required electrical connections.
F ie l dB u s card
BMS card
Fig. 4.c
Note: see the technical leaflets for the cards being installed.
c.pCOe expansion board installation
See the technical l0500059IE.
Ultracap module installation
See the technical le0500042IE and +0500041IE.
4.4 Electrical connections
Ethernet network
Connections:
• use CAT-5 STP shielded cables;
• always make the earth connection using the male spade near the
Ethernet connectors;
• the maximum length of an Ethernet connection is 100 m between
consecutive devices
J25 BMS2 J26 FBus2
J11 pLAN
c. pCO
MASTER
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
J25 BMS2 J26 FBus2
J11 pLAN
c.pCO
MASTER MASTER
PC
max 100 m max 100 m max 100 m
Fig. 4.d
RS 485 network
To improve the controller immunity against electromagnetic interference,
the serial connection cable should be a shielded twisted pair cable,
2-wire or 3-wire depending on the isolation of the serial connection. The
following rule applies:
•
if the serial port is isolated (functionally) from the power supply, a third
wire is required in the serial cable to act as a common reference for the
controllers. If the serial port is not optically isolated and the common
reference is already present, no third wire is required.
For the RS485 network, use a twisted pair cable with the specifications
shown in the table.
Master
device
HW Lmax(m) Wire/wire
capaci-
tance
(pF/m)
Resistor on
first and last
devices
Max. no.
of slave
devices
on bus
Data
rate
(bit/s)
c.pCOmini
FBUS
RS485
2/500 (not
shielded/
shielded
AWG 24)
< 90 120 Ω 64 19200
PC 120 Ω 207 38400
c.pCO Small...Extralarge
FBUS
RS485
1000 < 90 120 Ω 64 19200
PC 1000 < 90 120 Ω 207 38400
Note: in case of a Master–Slave network the max. allowable length
is 1000 m. If the network is longer than 100 m, apply 120Ω, 1/4W
terminating resistors to the first and last devices in the network.
N on-optically-isolated serial port
c.pCOmini: Fieldbus (J4) and BMS (J6).
c.pCO Small...Extralarge: serial ZERO - pLAN (J11), FieldBus 2 (J23 and
J26), and BMS2 if not optically isolated (on models with built-in ports that
are not optically isolated).
Case 1: multiple boards connected to a Master/Slave network powered
by the same transformer. Network length <100 m, terminating resistors
are not required (for example, multiple boards connected inside the
same electrical panel).