Doc No. FM0804 issue 4 Page 47
27. DATA REPEATER INSTALLATION
The Data Repeater (Tynetec P/No. ZXT340) can be connected
into the Advent XT2 RS485 system network to boost the data signal
on cable runs over 1200 metres.
INSTALLATION
LINK SETTINGS
LK1-
LK4 will normally be fitted in position “A”. Only move if advised by Tynetec’s
Technical Support.
Link No.
Function
Link Position “A
”
Link Position “B”
LK1
RS485 IN +
1K2 pull-up
open circuit
LK2
RS485 IN -
1K2 pull-down
open circuit
LK3
RS485 OUT +
1K2 pull-up
open circuit
LK4
RS485 OUT -
1K2 pull-down
open circuit
DIL SWITCH SETTINGS
SW1
allows a different end of line (EOL) resistance to be set on the
RS485 IN
terminals depending on the number of
network legs connected to the Advent XT2 controller.
DIL SW1
Function
DIL Switch OFF
DIL Switch ON
1
RS485 IN EOL 1 Leg
open circuit
120 ohms
2
RS485 IN EOL 2 Legs
open circuit
270 ohms
3
RS485 IN EOL 3 Legs
open circuit
390 ohms
4
RS485 IN EOL 4 Legs
open circuit
680 ohms
SW2
allows a different end of line (EOL) resistance to be set on the
RS485 OUT
terminals. This is normally left open
circuit. Only move if advised by Tynetec
’s
Technical Support.
DIL SW2
Function
DIL Switch OFF
DIL Switch ON
1
RS485 OUT EOL 1 Leg
open circuit
120 ohms
2
RS485 OUT EOL 2 Legs
open circuit
270 ohms
3
RS485 OUT EOL 3 Legs
open circuit
390 ohms
4
RS485 OUT EOL 4 Legs
open circuit
680 ohms
Cut the Advent XT2 system network
data wires (TX+/TX-) at a point before
the signal begins to fail.
The 24V & 0V power connection can be
taken from the Advent XT2 system
network.
Connect TX+/TX- FROM the Advent XT2
controller into the RS485 IN terminals.
Connect the remaining Advent XT2
network data wires TX+/TX- into the
RS485 OUT terminals.
System
Network
“IN”
System
Network
“OUT”
