M-NET Interfaces

M-Net interfaces were developed to permit the connection of a wide variety of input and output signals (i.e. for monitoring and control) to the MELANS management and supervision system. These interfaces are connected directly to the M-Net data transmission bus. The modular concept of these interfaces means that multiple interfaces can be connected to the same network. To connect interfaces, a 24V DC auxiliary power feed must be provided with an additional power supply unit (purchased separately). The following M-Net interfaces are available:

• PAC-YG60MCA: Digital meter interface (Pulse Input).
• PAC-YG63MCA: Analogue sensor interface (Analogue Input).
• PAC-YG66DCA: Digital sensor interface (DIDO).

PAC-YG66MCA – DIDO

The PAC-YG60MCA M-Net interface is a device for acquiring signals from wall or electrical cabinet mounted digital input/output sensors. The interface is connected directly to the M-Net network (TB3-TB7), and occupies the same address as the indoor units (from 01-50) for each of the external devices connected (up to 6 external device).

Each external device may have the following inputs and outputs:

• 1 ON/OFF command signal output
• 1 ON/OFF status input
• 1 malfunction status input

A WEB Server 3D (TOUCH or BLIND) centralised controller and, if required, a supervisor system, are needed to use the interface. The following functions are available:

• View state of ON/OFF or malfunction status inputs
• Control ON/OFF output
• Interlock with air conditioner functions
• Interlock with other digital inputs/outputs (even relative to other interfaces)
• View units as icons on installation layout map

The interface also includes a relay and terminal boards integrated on the electronic board of the interface itself for connecting two external devices. Two additional PAC-YG10HA accessory modules must be installed to permit connection of the remaining four external devices to the interface. These accessory modules enable additional open collector output signals. The relative connector terminal boards and control relays, however, must be obtained and installed separately.