Bosch ARD-FPBEPPR-OC Installation Manual page 21

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NOTICE!
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RS485 Connection for Secure I/O
1 =
2 =
NOTICE!
Maximum number of devices in an RS485 loop is eight (8)
including Host PC or Host device. Each device can connect
Secure I/Os up to four (4)
Bosch Access Systems GmbH
Adjust the communication speed as needed. The signal
quality vary depending on wiring conditions, and it may be
necessary to lower the baudrates.
The GND signal may be omitted if and only if the GND
potential difference is less than ± 5V.
Only the devices at the both ends of the bus should be
terminated. To enable termination on the RS232-485
converter, refer to the converter's manual.
The stubs should be as short as practical.
Installation manual
Connections | en
| V 1.1 | 2010.10
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