Rs-485 Interface For Card Readers; Connecting Relay Outputs - Bosch APC-AMC2-4R4CF Installation Manual

28 en | Installing
4.13

RS-485 Interface for Card Readers

The AMC2-4R4 has four RS-485 interfaces. Each interface is connected using a 10-pin
pluggable screw connector (S2, S7, S14, and S19).
Figure 4.16: Location of the RS-485 interfaces 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.
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 43.
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
–
4.14

Connecting Relay Outputs

To operate locks or alarm systems, the AMC2-4R4 has eight relay outputs. The outputs will be
connected to the 3-pin pluggable screw connectors S5, S6, S10, S11, S17, S18, S22, and S23
- refer to chapter Connecting Diagrams, page 43.
2020-01 | V02 |
RS-485 Host Interface, page 22
Installation manual
Access Modular Controller 2
Bosch Security Systems B.V.