Carel MPXone ACS00CB000010, Руководство пользователя

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2.7 Positioning
inside the panel
The position of the controller in the electrical cabinet must be chosen so as to guarantee correct physical
separation from the power components (solenoids, contactors, actuators, inverters, ...) and the connected
cables. Proximity to such devices/cables may create random malfunctions that are not immediately
evident. The structure of the panel must allow the correct flow of cooling air.
2.8
Electrical
installation
Important:
When laying the wiring, "physically" separate the power part from the control part. The proximity of
these two sets of wires will, in most cases, cause problems of induced disturbance or, over time,
malfunctions or damage to the components. The ideal solution is to house these two circuits in two
separate cabinets. Sometimes this is not possible, and therefore the power part and the control part must
be installed in two separate areas inside the same panel. For the control signals, it is recommended to
use shielded cables with twisted wires. If the control cables have to cross over the power cables, the
intersections must be as near as possible to 90 degrees, always avoiding running the control cables
parallel to the power cables.
Pay attention to the following warnings:
l
use cable ends suitable for the corresponding terminals. Loosen each screw and insert the cable ends,
then tighten the screws. When the operation is completed, slightly tug the cables to check they are
sufficiently tight;
l
separate as much as possible the probe signal, digital input and serial line cables from the cables
carrying inductive loads and power cables to avoid possible electromagnetic disturbance. Never run
power cables (including the electrical cables) and probe signal cables in the same conduits. Do not
install the probe cables in the immediate vicinity of power devices (contactors, circuit breakers or
similar);
l
reduce the path of the probe cables as much as possible, and avoid spiral paths that enclose power
devices;
l
avoid touching or nearly touching the electronic components fitted on the boards to avoid
electrostatic discharges (extremely damaging) from the operator to the components;
l
do not secure the cables to the terminals by pressing the screwdriver with excessive force, to avoid
damaging the controller: maximum tightening torque 0.22-0.25 N•m;
l
for applications subject to considerable vibrations (1.5 mm pk- pk 10/55 Hz), secure the cables
connected to the controller around 3 cm from the connectors using clamps;
l
all the extra low voltage connections (analogue and digital inputs, analogue outputs, serial bus
connections, power supplies) must have reinforced or double insulation from the mains network.
2.9
Serial port
connections
For serial connections (FBus and BMS ports), the cables used must be suitable for the RS485 standard
(shielded twisted pair, see the specifications in the following table). The earth connection of the shield
must be made using the shortest connection possible on the metal plate at the bottom of the electrical
panel.
Master
device
Serial
port
Lmax
(m)
Wire/wire
capacitance
(pF/m)
Resistance on first
and last device
Max no. of slave
devices on bus
Data rate
(bit/s)
MPXone FBus 10 <90 120 Ω 9 19200
PC
(supervision)
BMS 500 <90 120 Ω - 19200
The power supply connections must be in phase between the two controllers (G0 on the master
controller and G0 on the slave controller connected to the same power supply wire); the serial connection
between the two controllers (J5 FBus on the master and J4 BMS on the slave) must be made as shown in
the following figures (+ with + and - with -).
Note: connect the shield to the earth in the electrical panel. Use shielded twisted pair cable (e.g.
Belden 8762 - AWG 20 or BELDEN 8761 - AWG 22). Connect a 120 Ω terminating resistor between the
Tx/Rx+ and Tx/Rx- terminals on the last controller on the RS485 line.
ENG
0300086EN rel. 1.0 – 04.09.2018
2. Installation | 19