User manual

8
ENGLISH
ir33 +030220441 - rel. 2.5 - 16.06.10
HACCP
This function, increasingly required in the refrigeration market, is included as standard on all models with clock. This allows the monitoring of
critical points by measuring and recording the temperatures in the event of high temperature alarms or power failures.
Up to 3 high temperature alarms and 3 alarms corresponding to power failures can be saved.
Light management
The ir33 platform has been enhanced by the introduction of the function for managing the light when the door opens, set by
parameter.
Keypad protection
The keypad and the remote control can be disabled to avoid tampering by unauthorised persons, above all in the event when the
controller is installed in an area open to the public.
Continuous cycle
The “continuous cycle” function ensures the operation of the compressor for the time set by the
corresponding parameter. This function is useful when a rapid reduction in the temperature is required.
Serial connection
The entire range has an RS485 serial port for network connection to supervisor or telemaintenance systems using a shielded
twisted pair cable.
ModBus
®
As well as the CAREL communication protocol, IR33 can also use Modbus
®
. The protocol (Modbus
®
, CAREL) is recognised automa-
tically, the instrument does not need to be con gured. In addition, the serial board remains the same.
Index of protection
The gasket inside the front panel and the material used to make the keypad guarantee IP65 protection for the controller on the
front panel.
Installation
The controllers are mounted using the screws at the front, or alternatively using two quick- t side brackets, with compact
dimensions, made from plastic.
In-circuit testing
The ir33 platform controllers are made using the most advanced SMD technology. All the controllers undergo “IN-CIRCUIT TESTING” to
check electrical operation of all components.
NTC probe
The controllers can manage two types of NTC probes (see parameter “/P”): standard version –50T90°C (NTC0*HP*) or alternative-
ly the model for high temperatures, up to 150°C (enhanced NTC –40T150°C).
Watch dog
This feature prevents the microprocessor from losing control over the unit even in the presence of considerable electromagnetic
disturbance. In the event of abnormal operation, the watchdog function re-establishes the initial operating status.
Not all the competitors  t their products with this safety feature.
Electromagnetic compatibility
The ir33 platform is compliant with EU standards on electromagnetic compatibility. The quality and the safety of the ir33 control-
lers are ensured by the CAREL ISO 9001 certi ed design and production system and by the CE mark on the product.
Network functions
The controllers feature management of multiplexed defrosts, remote alarm signals and the downloading of the parameters via the
local network.
Parameter selection
Selection of the parameters on the display simpli ed by the use of icons or with the standard Carel procedure.
Con guration of the digital inputs
The digital inputs can be con gured and used as NTC probe inputs, by simply setting a parameter.
Connectors
Models  tted with spade connectors,  xed or plug-in screw terminals.
Options
• programming key;
• RS485 serial interface can be added at any time;
• optional repeater display for models with switching power supply.
For further information, see the chapter on “Accessories”.
Number of relays
Number of relays Compressor Light
ir33 from 1 to 4 8 A and 16 A
ir33power from 1 to 4 2 Hp
ir33DIN from 1 to 5 16 A and 2 Hp
powercompact from 2 to 5 8A, 16 A and 2 Hp
powercompact small from 2 to 4 2 Hp
masterCella from 3 to 5 30 A 72 A (2 Hp)