Breezair IWC05, Быстрый старт, Страница: 2 / 8

The Breezair Industrial Wall Control (IWC05) is designed to provide both local and external Evaporative Air cooler
control for all Breezair air coolers fitted with the CPMD digital module. The external control may be either a PLC or
Building Management System. The IWC05 is designed to accept external input voltages ranging from 4VDC to
32VDC and will switch outputs ranging from 1.4VDC to 32VDC at a load of 40mA. The IWC05 has binary outputs
for Temperature and Humidity for use with other equipment.
CABLE LENGTHS
The maximum total cable length between the cooler CPMD module and the Remote sensor (via the IWC05)
is 100m.
Within this limit, the maximum sensor cable length must not exceed 60m. EG: a combination of 40m of
comms (communications) cable and 60m of sensor cable is permitted and 80m of comms cable and 20m of sensor
cable is permitted.
Each IWC05 kit is provided with one 20m sensor cable and one 40m comms cable. 80m comms cables and 60m
sensor cables are available as an option, to be purchased separately.
The above restrictions apply in order to avoid excessive voltage drop and electrical noise.
YOU MAY USE LONGER CABLES WHEN REQUIRED, BUT WHEN YOU DO THE FOLLOWING CONDITIONS
MUST APPLY:
Cable conductors must be larger to reduce voltage drop.
Cables must be screened (or shielded) to reduce noise.
Screens must be earthed (grounded).
Ensure that conductors are correctly orientated. Use junction boxes or high quality plugs for
terminations.
Seeley International takes no responsibility for mal-function of the IWC05 when longer
cables are used.
See diagram 2.
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Industrial Wall Control Application Notes
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AUTO [Auto] mode, and manual control of the cooler functions in the MANUAL [Man] mode.
The IWC05 may also be set up to control the Air Cooler from EXTERNAL devices, such as PLCs and Building
Management System computers. In this case the IWC05 will cease to function in its AUTO [Auto] or MANUAL
[Man] mode and will respond only to the external commands.
The IWC05 provides at all times outputs that may be employed to command other external devices such as
dampers, fans, signal equipment, etc. These outputs contain the status of the various Air Cooler components (fan,
pump, drain valve), as well as the Remote Sensor temperature and humidity values.
To ensure signal integrity over distances greater than 100 meters between the IWC05 and the PLC or Building
management system it is advisable to use shielded cables.
INPUT CONFIGURATION
Connect the Positive input to the input terminals. This voltage must range between 4VDC to a maximum of 32VDC.
Current in the input is limited by the series resistors.
Connect the Negative input to the common terminal.
All inputs to the IWC05 are optically isolated from the main circuits.
The IWC05 does not have its own internal power supply to operate the external inputs.
These cables are transmitting digital signals
and must not be installed next to power cables.
INPUTS AND OUTPUTS
The IWC05 may be set up to control the Air Cooler
as a local machine, independent of any other
devices. In that case there will not be any
connections made to the Input and Output
terminals. The Remote Sensor supplied in this Kit
together with the IWC05 will provide automatic
temperature and/or humidity control along with its
water management and auto drain features in the
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ILL1415-A
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CONNECTION ORDER FOR SENSOR CABLE ONLY