Functional Diagrams; Connecting The Mchrtf**** Module - Carel MPXPRO User Manual

ENG

2.6 Functional diagrams

The MPXPRO controllers are systems that manage refrigeration units (for
example, one or a series of multiplexed showcases). These systems are
made up of control boards connected together in Master-Slave mode;
each Master board can manage up to 5 Slaves. The functional diagrams
below show some examples of typical applications:
1. 1. Stand alone confi guration and optional cards
available
RS485 3
MPXPRO
High
voltage
master
tLAN
3
AUX AUX
IR00XG*300 IR00UG*300
For the electrical connections see the general connection diagram in par.
2.8.
The Master controller can be supplied without the driver board
(MX30M00E00), with the driver board for E2V valve (MX30*25E00) or with
PWM driver board (MX30*24E00).
Available options:
• 0 to 10 Vdc expansion board (MX3OPA1002). If installed, the drivers
cannot be fi tted: in this case the driver board with the 0 to 10 Vdc
output incorporated;
• on MPXPRO Slave boards (MX30S*****) the RTC and RS485 serial
interface accessory (MX3OP48500) can be added)
2. Master/ Slave network with user terminals and
remote display
The Master controller, connected to the supervisor network, acts as
the gateway and coordinates the functions of the 5 Slave controllers
connected in the tLAN. Each controller has its own user terminal and
remote display.
RS485 3
PlantVisorPRO/
PlantWatchPRO
per supervisione/
for supervision
High
voltage
master
tLAN 2
MPXPRO MPXPRO
High High
voltage voltage
slave 1 slave 2
tLAN 3 tLAN 3
AUX AUX
AUX AUX
For the electrical connections see the general connection diagram in par.
2.8.
MPXPRO - + 0300055EN rel. 1.0 30/08/10
MX2OPSTP** MX2OPPWM**
MX2OP48500
(only for MX20S*****)
MX2OPA1002
Fig. 2.j
MPXPRO
AUX
AUX
tLAN 3
MPXPRO MPXPRO
High High
voltage voltage
slave 3 slave 4 slave 5
tLAN 3 tLAN 3 tLAN
AUX AUX AUX
AUX AUX AUX
Fig. 2.k
3. Master/Slave network with shared user terminal and
local remote display.
PlantVisorPRO/
PlantWatchPRO
per supervisione/
for supervision
tLAN 2
MPXPRO
High
voltage
slave 1
tLAN 3 tLAN
AUX
For the electrical connections see the general connection diagram in par.
2.8
4. RS485 supervisor network
The maximum number of Master controllers that can be connected in
the network also depends on the number of Slaves connected to each
Master; the maximum total is 199 controllers (CAREL and Modbus®
protocol).
PlantVisorPRO/
PlantWatchPRO
per supervisione/
for supervision
For the electrical connections see the general connection diagram in par.
2.8.

2.7 Connecting the MCHRTF**** module

The connection of the MCHRTF**** single-phase speed controller for
evaporator fans requires a resistor in series, as shown in the following
fi gure:
230 Vac
50 Hz
MPXPRO
High
voltage
3
12 V
PWM1
PWM2
14
RS485 3
MPXPRO
High
voltage
master
AUX
tLAN 3
MPXPRO MPXPRO
High High High
voltage voltage voltage
slave 2 slave 3 slave 4
3 tLAN 3 tLAN 3
AUX AUX AUX
Fig. 2.l
3
RS485
MPXPRO MPXPRO
High High
voltage voltage
master 1 master 2
Fig. 2.m
M
L N LOAD
4 A
PWM
control
signal
R=470Ω
Fig. 2.n
MPXPRO MPXPRO
High
voltage
slave 5
tLAN 3
AUX
MPXPRO
High
voltage
master n
MCHRF module