Tecnoalarm Tecnofire TFA2-596, Installation Manual, Page: 53 / 64

TFA2-596 - TFA4-1192
53
- + B A - + B A - + B A
- + B A
- + B A - + B A - + B A
- + B A
ON
2 3
4
1
ON
2 3
4
1
ON
2 3
4
1
10-3 - RS485 bus connection
- Master control panel
- Bus termination
- Jumpers inserted - Slave control panel
- Bus continues
- Jumpers open - Slave control panel
- Bus continues
- Jumpers open - Slave control panel
- Bus termination
- Jumpers inserted
Open loop connection to Master control panel
- Control panel
- Bus termination
- Jumpers inserted
- Repeater
- Bus continues
- SW1.1 OFF
Open loop connection to Master Bus
- Repeater
- Bus continues
- SW1.1 OFF - Repeater
- Bus termination
- SW1.1 ON
The control panel provides two RS485 ports used to connect a total of 16 expansion devices.
The same serial ports can be used to connect other control panels creating a network of maximum 16 control panels.
The master and slave bus can be connected in open or closed loop mode. In this latter case, the loop wired to the Master Bus port
is closed on the Slave Bus port. The RS485 bus must be balanced with resistors inserted on the
fi rst and on the last device of the bus.
For Master Bus connection, it is recommended to use shielded multicore twisted-pair cables with fl exible conductors.
The minimum section of the conductors must be in proportion to the extension of the bus and to the consumption of the connected devices.
For reasons of electrical safety, the shieldings of the cables must be connected in order not to stop their path and must be
grounded inside the casing of the control panel.
The maximum length allowed for the RS485 bus (Master Bus) is 1000m. For greater distances use a fi ber optic connection by
connecting a TFSFC01 RS485- fi ber optic converter.