6
3.1 - Control boards
Each circuit is by default fitted with one SIOB/CIOB board used
to manage all inputs and outputs of the controller. TCPM board is
used to control and protect the operation of screw compressors
and AUX1 board provides the refrigerant leakage detection option.
At the same time, Energy Management Module (EMM) requires
an additional SIOB/CIOB board to be installed. All boards
communicate via an internal LEN bus.
SmartVu
TM
continuously monitors the information received from
various pressure and temperature probes and accordingly starts
the program that controls the unit.
The electrical box includes all boards controlling the unit and the
user interface.
The unit is equipped with the SmartVu
TM
user interface:
■
4.3-inch colour LCD touch screen (standard)
■
7-inch colour LCD touch screen (optional)
.
3.2 - SmartVu
TM
connections
Depending on the size of the touch screen, connections are located
on the bottom (or the bottom and the right side) of the main
controller.
■ The control offers communication protocols such as LEN, CCN
(Carrier Comfort Network), Modbus, or BACnet.
■
It is possible to enable and disable end of line resistors via the
System menu (see section 5.6).
■
Ethernet ports allow for TCP/IP communication or BMS
(Building Management System) connection.
4.3" standard touch screen - bottom view
7" optional touch screen - bottom view
7" optional touch screen - side view
3 - HARDWARE DESCRIPTION
3.3 - Power supply to boards
All boards are supplied from a common 24 VAC supply referred
to earth. In the event of a power supply interrupt, the unit restarts
automatically without the need for an external command. However,
any faults active when the supply is interrupted are saved and
may in certain cases prevent a given circuit or the unit from
restarting.
CAUTION: Maintain correct polarity when connecting the power
supply to the boards, otherwise the boards may be damaged.
3.4 - Light emitting diodes
All boards continuously check and indicate the proper operation
of their electronic circuits. A light emitting diode (LED) lights on
each board when it is operating properly.
■ The red LED flashing for a two-second period indicates correct
operation. A different rate indicates a board or a software failure.
■ The green LED flashes continuously on all boards to show that
the board is communicating correctly over its internal bus (LEN
bus). If the green LED is not flashing, this indicates a LEN bus
wiring problem or a configuration issue.
