Bosch F.01U.278.516 用户手册

en | Description

Relay Unit

F.01U.278.516 | V1.0 | 2012.11

User Manual

Bosch Security Systems

One Main Unit and up to 32 Relay Units can be connected by a RS-485 bus. The bus must be 

connected to pins 2 and 5 of the RS-485 socket.


For connector wiring, see Section A.5.3 RS-485 socket (unit rear), page 30.

In this configuration, you always should connect the Main Unit first. The Relay Units must then 

be connected to the RS485-bus one by one, not at the same time.

In the same connector, a potential free contact is available. It is a low current switching 

contact. The relay (potential free, switching power max. 48 V / 0.5 A) is activated at a call for 

help, call for assistance or fire alarm. This relay can be set as closing or switching contact 

(cycle of 10 seconds on / 10 seconds off). This feature can be used to drive a signal lamp for 

example.


For connector wiring, see Section A.5.3 RS-485 socket (unit rear), page 30.



For relay setting, see the user manual of the Main Unit.

The antenna is connected to the Relay Unit using the adapter supplied with the unit.


See Section 3.2.4 Installing the antenna, page 14.

Keep polarity equal when connecting further units to the RS485 bus!

Maximum RS485-bus length: 3’900 ft (1200 m).

Use only one twisted pair cable for the interconnection.

The receiver units located at the two ends of the bus must be terminated with a 100 Ohm 

resistor. See Section 3.2.6 Connecting the RS-485, page 16 for more information about the 

jumper setting.