PCA 2 1000D OPERATING INSTRUCTION25055055

Information
•
Except the data link “A (D+)”, “B (D-)” the “ID1 - ID2” and the
“GND” connection may no further cable cores of the data line be
used.
•
The connections for the automatic addressing “ID1” and “ID2”
are not directly connected with each other internally. These may
not be bridged; any order of connection is possible.
•
If a repeater is necessary and automatic addressing is to be
carried out, only certain repeaters that relay the addressing
signal can be used.
On the first user that is connected directly to a terminal, MODBUS
Master or PC, “GND” and “ID1” or “ID2” must be bridged. This is
recognised as a result and occupied by address 1.
For the following users the connection “ID1” or “ID2” of a user
respectively is connected with connection “ID1” or “ID2” of the next
user.
The automatic addressing of other users is initiated by the pre-
vious user via this connection.
5.7 Input for outdoor temperature sensor
For
4.02 and 5.02 operating modes with setpoint adjustment
depending on outdoor temperature, the outdoor temperature sen-
sor is connected at the “TF” terminals. You can connect passive
temperature sensors TF... (KTY81-210) or PT1000, and the polar-
ity is not relevant.
For a high interference immunity a capacitor must be connected
directly to the sensor (1 nF parallel). With temperature sensors
type TF.. (KTY81-210) a capacitor is integrated.
Danger due to electric current
Never apply line voltage to analog inputs!
Operating Instructions PCA-2 1000D2 Electrical installation
L-BAL-E295-GB 1906 Index 001 Part.-No.
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