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Building Technologies PXC...-U – Automation stations modular model CA1N9221en
Building Automation 23.09.2005
There are various options for operation of the PXC…U automation stations:
• QAX... room unit connected to the PPS2 interface. A maximum of five room units
QAX… (not QAX5…) can be connected. Details on the PPS2 communication are
described in the DESIGO Technical principles manual (chapter "I/O blocks", section
"PPS2 addressing").
• Local PXM10 operator unit, either plugged into the automation station or connected
via PXA-C1 cable
• Network-compatible PXM20 operator unit (BACnet / LON)
for operation of the local automation station or an automation station in a network,
either plugged into the automation station, or connected via PXA-C1 cable
• Network-compatible PXM20-E operator unit (BACnet / IP)
for operation of the local automation station or an automation station in a network,
either plugged into the automation station, or connected to the Ethernet network or
an Ethernet switch.
• PX-WEB: The PXA30-W… extension module is used to activate the Web server,
allowing operation with a Web browser, a touch panel or a PDA.
The transfer of alarms via SMS or e-mail can be configured in the automation
station.
Technology
The data between the automation station and the I/O modules are exchanged via the 3-
core P-bus.. Each module on the same P-bus is provided with its own address between
1 and 255. The addresses are set with address plugs.
The automation stations provide the connected I/O modules with a DC 23 V supply.
The automation station load by I/O modules is expressed by the number of load units of
12.5 mA each (details of the calculation of the total load see the I/O module range
document CM2N8100).
Operation
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