Bosch APC-AMC2-4R4CF - Page 56

56 en | Installing Access Modular Controller 2
2020-01 | V02 | Installation manual Bosch Access Systems V.B.
The following conditions apply for an RS-485 bus system:
– A bus system consists of a bus line and/or one or more branch lines.
– Cable lengths exceeding 100m (300ft) must be installed as bus lines.
– Branch lines are branching connections from a bus line.
– Peripheral devices are AMC2 which are connected to the host computer.
– Maximum cable length of a bus line must not exceed 1200m (4000ft).
– The cable length of branch lines must not exceed 100m (330ft).
– Any bus line conductor connects up to eight AMC2. Do not exceed the maximum number
of devices.
To use RS-485 mode at the AMC2-4R4 , connect the data cables to the pluggable screw
connector of the RS-485 host interface. The setting of the AMC2-4R4 must correspond with
the settings of the RS-232 / RS-485 converter.
Figure4.34: RS-485 host interface
Figure4.35: RS-485 host interface
Figure4.36: RS-485 host interface