LEGRAND 288 12 Guia De Inicio Rapido página 6

Configuration
Conf.A1 - A2 - A3 Address configurators (1 to 255)
Conf.M Communication mode configurator
Conf.B Transmission speed configurator
Conf.F Transmission mode configurator
An address is assigned to the device using the first three
configurators.
The other configurators will define the operating modes.
In details:
Conf. A1 - A2 - A3 - Modbus Address
The Modbus address is defined by configuring the first three positions.
Each of them may be "no configurator"=0, 1 to 9.
With the MODBUS protocol, the value of the address (in decimal
format), is obtained as follows:
Conf.A1x100 + Conf.A2x10 + Conf.A3
Example:
Conf.A1=2, Conf.A2=3, Conf.A3="no configurator":
the address value is 230.
Technical features
Size: 6 DIN modules
Operating temperature: (-10) – (+55) °C
*
RT= C haracteristic cable impedance (e.g. 120 Ω
for Belden cable 9842).
The termination resistances must only be
connected to the first and last RS -485 nodes,
between the + and - terminals. All "SG"
terminals must be connected to each other.
Also, connect the screen to the earth in one
point for each line only, ensuring that screen
continuity is maintained across the whole line.
It is recommended that a shielded communication
cable is used to connect item 288 12 to the DMX
switch (Belden 9842 or equivalent).
Interface
24V
RS485
RT
Conf.M - Modbus Transmission Mode
The transmission mode is defined as follows:
- 1
- Other values or
"no configurator"
Conf.B - Modbus Transmission Speed
The transmission speed is defined as follows:
- 1
- 2
- 3
- 4
- 5
- 6
- "no configurator"
Conf.F - Mode of operation
The additional functionalities are defined as follow:
- 1
- 2
- Other values or
"no configurator"
ON
RL6 RL5 RL4
TX
RX
RL3 RL2 RL1
24V 1 2 + -- SG 1 2 3 4
24V RS485/DMX 3 DPX
6
ASCII mode
RTU mode
1,2 kbit/s
2,4 kbit/s
4,8 kbit/s
9,6 kbit/s
19,2 kbit/s
38,4 kbit/s
"default " (speed 19,2 kbit/s)
Contact repetition side-by-side
with DMX circuit breaker
3
Contact repetition side-by-side
with DPX circuit breaker
Use with supervision system
ON
RL6 RL5 RL4
TX
RX
RL3 RL2 RL1
24V 1 2 + -- SG
24V RS485/DMX
*
RT
1 2 3 4
3 DPX