Toshiba TCB-IFMB640TLE Manual De Instalación página 9

TCS-NET Modbus Protocol Conversion Interface
Wiring Connection
The following describes a connection example when using two or more TCB-IFMB640TLE units.
Terminator resistor setting (See "6 SETTING" for the setting method.)
• Set the RS-485 terminator resistor to "120 ohm" for No.1 (relay interface address SW1=1) TCB-IFMB640TLE
unit, and set to "open" for other units.
• Set the TCC-LINK terminator resistor to "open" as it is set on the air conditioner side.
Shield earthing
• The shield of RS-485 signal wires should be connected at closed end, and the terminal end should be open and
insulated. The shield earth of the RS-485 signal wires should be single-point earth at the Modbus master.
The shield earth of the RS-485 signal wires should be single-point earth.
• The shield of TCC-LINK signal lines should be connected at the closed end, and the TCB-IFMB640TLE terminal
end should be open and insulated. Earth is connected on the air conditioner side.
Modbus-Master
A B
The shield of RS-485 cable should be
open and insulated. It is not connected
to the terminal block.
CAUTION: RS-485 signals A and B
have polarity. Be careful when
connecting the RS-485 wires.
RS-485 terminator resistor is set by relay interface of address
setting switch SW=1 only. Set pull-up resistor and pull-down
resistor as well. Turn bit 1, 2 and 3 of SW5 ON.
The shield of TCC-LINK
cable should be open
TCC-LINK U1 and U2
and insulated. It is not
have no polarity. connected to the
terminal block.
A
B
SW5
ON
1 2 3 4
SW5
ON
4
1 2 3
– 9 –
TCC-LINK terminator resistor is set
on the air conditioner side. Bit 1 and
2 of SW6 should be OFF.
Set the RS-485 terminator resistor
on the No.1 unit (TCB-IFMB640TLE
address SW1=1) and Modbus
SW6
ON
master. Do not set it here.
1 2
U4 U3
U2 U1
U2 U1
SW6
ON
1 2
U4 U3
U2 U1
U2 U1
Set the TCB-IFMB640TLE address with SW1.
Assign 1 to F to each address to avoid
duplication.
CAUTION: The SW1 setting is read when the
power is turned on. press the reset switch SW7
after changing the address.
Installation Manual
U4 U3 U4 U3
U2 U1
U2 U1 U2 U1
U4 U3
U4 U3
U2 U1
U2 U1
U2 U1
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