Bosch AMC-4W Installation Manual page 20

Technical Data
Conductor data
RS485 slave
Note: The voltage drop at the different cables add up! Their sum shall be less
than 2V!
20
Use AWG22 conductors.
Please, calculate your voltage drop (see above) by
checking conductor specifications for characteristic
resistance values.
Installation Guide
Access Controller AMC-4W
Bosch Security Systems | V.3.1/2006-09