6 Engineering of communicative devices
Only one type of each device as described below can connect to S300
controllers.
6.1 PL-Link
General rules
●
Via PL-link 1 room operating unit POS8.4420 (T) or 1 POS8.4440 (T, rH) can
be connected to the controller unit.
●
Additionally it’s possible to connect PL-link room sensors (QMX3..) to acquire
additional information from rooms.
Because of auto-connect and KNX/PL-Link power supply the number of room
operator units and room sensors is limited.
Limits for PL-Link devices
1 device
2 devices
plus...
3 devices
plus…
Example
POS8.4420
any QMX3.P..
a different type of
QMX3.P..
POS8.4420 + QMX3.P30 +
QMX3.P70
POS8.4440
any QMX3.P..
a different type of
QMX3.P..
QMX3.P30
QMX3.P40 or
QMX3.P70
a different type of
QMX3.P..
QMX3.P40
QMX3.P70
a different type of
QMX3.P..
QMX3.P70
QMX3.P30 or
QMX3.P40
a different type of
QMX3.P..
QMX3.P30 + QMX3.P40 +
QMX3.P70
For more information about configuring the connection, see
"Selecting the device connections [➙ 31]".
Communication monitoring
Communication with room operator unit and sensors is constantly monitored. The
monitoring is activated as soon as the device is selected (basic configuration).
If the communication with one of the devices cannot be established or gets lost, a
collective B-alarm is triggered: "3101 Room sensor, KNX PL-Link communication
error".
NOTICE
Unsuccessful detection of devices
Selected KNX / PL-Link devices must be connected before powering the
controller, otherwise the devices will not be recognized.
Engineering of communicative devices
PL-Link
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