Instructions
118Hardware
© 2013 Conrad Electronic
Beispiel Verbraucheranschluss an Ausgang Q1
Attention: Other I2C bus modules use the same I2C expander chips (PCA8574). Therefore the
maximum number of modules with this IC is limited to 8!
Addressing:
The I2C address jumpers J1 to J3 are located on the front of the RELBUS-Board. When using sev-
eral modules and depending on the desired address the jumper must be set as follows:
J3
J2
J1
Address
-
-
-
Hex 27
-
-
x
Hex 26
-
x
-
Hex 25
-
x
x
Hex 24
x
-
-
Hex 23
x
-
x
Hex 22
x
x
-
Hex 21