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COOLING
5
5.1 Cooling in s-MEXT units
5.1.1
Communication with the Mr Slim unit
During the management and control of Mr Slim units, it is necessary to use interface cards (PAC-IF013B-E), through which the
s-MEXT unit will send commands and request information from the Mr. Slim units.
There are 2 possible types of connections for the use of Mr Slim units, depending on the number of them being used with the s-
MEXT unit.
The following diagrams identify the connections.
5.1.2
Connection to only one external Mr Slim unit
The connection, represented in the figure below, requires the internal unit (s-MEXT) to control through the RTU Modbus
protocol the PAC-IF013B-E card, which will then manage the Mr Slim external unit.
5.1.3
Connection to more than one external Mr Slim unit
With this connection, represented in the figure below, the internal unit (s–MEXT) controls through the RTU Modbus protocol the
Client PAC–IF013B–E card, which will then manage both the first external Mr Slim unit (address 0) and the Server1 PAC–
IF013B–E card.
The Server1 PAC–IF013B–E card manages the second Mr Slim unit (address 1).
In this case, the PAC–IF013B–E Client card must be configured for the IMOUC function (Intelligent Multiple Outdoor Unit
Control), independently managed by the PAC–IF013B–E.
Version 38
Figure 5-1: Logic diagram for connection to 1 Mr. Slim unit.
Figure 5-2: Logic diagram for connection to 2 Mr. Slim units.
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