Honeywell EK280 Applications Manual page 158

EK280
7.5.4.1.1 Two-wire simplex – wiring
i
This function is only available since EK280 software version 2.20.
EK280
* : For connection to a bus system, refer to the information in  chapter 7.5.3.1.1.
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7.5.4.1.2 Four-wire full duplex – wiring
EK280
Application Manual
T-
T+
R-
R+
Ri
GND
Uext+
Uext-
T-
T+
R-
R+
Ri
GND
Uext+
Uext-
Data -
Bus Master
Data + RS485 *
+ Power supply
8 V (DC)
-
Data -
additional bus
Data +
subscribers
R-
R+
Bus Master
RS485
T-
T+
+
Power supply
8 V (DC)
-
T-
T+
additional bus
R- subscribers
R+
156
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