Interface For Card Readers - Bosch APC-AMC2-4R4CF Installation Manual

Access Modular Controller 2
Figure 4.58: Location of the RS-485 interface for external devices
The interfaces 1 and 2 build a bus (bus 1) for its own like the interfaces 3 and 4 (bus 2).
All eight possible readers can connect to each of the busses in any combination. However, the
addresses of the readers must be unique on an AMC2.
Two readers can connect to the bus.
The voltage on the interface is equal to the input voltage of the AMC2-4R4
A complete connection diagram of the RS-485 interface is shown in chapter Connecting
Diagrams, page 102.
Notice!
Please check which voltage the readers require. If this does not correspond to the input
voltage, this will require an external power supply.
Notice!
If the current consumption on the interface is higher than 1.5A then change the distribution
to the other interfaces or use an external power supply for the reader.
Notice!
Damage to the device due to wrong voltage
Make sure that the readers support the same voltage as the power supply unit that is
connected to the AMC. Readers that do not support the same voltage will be damaged.
Refer to
–
4.15 RS-232 Interface for Card Readers
The AMC2-4R4 has RS-232 interface to integrate with RS-232 compatible interfaces. Each
interface is connected using a pluggable screw connector .
Bosch Access Systems V.B.
RS-485 Host Interface, page 55
Installation manual
Installing | en 73
2020-01 | V02 |