50
7. Communications
7.1 Infrared (IR)
All products in the range can communicate via an infrared bus between adjacent controllers.
It enables the parameters of up to seven products to be passed to a product fitted with RS485
(products with a graphics display). The LC2650 can be designated a master or a slave unit.
The product connected to the RS485 networks must be fitted on the left of all the slaves
fitted to the IR bus (Figure 25) and have ‘master’ selected in the ‘output-comms’ menu.
Master
Slave
IR Bus
RS485
Fig. 25
Slave Slave Slave
Two or more IR buses can share the same panel or DIN rail by selecting another IR master.
Master 2 will ignore bus 1. See Figure 26.
To add another slave into an existing IR bus, re-select ‘master’.
Only an IR master can pass the IR bus parameters to the RS485 network. If a slave is also
connected to the RS485 network, only its parameters are passed.
Caution: Do not cover or obstruct the infrared beam between products.
Fig. 26
Master
1
IR Bus 1
RS485
IR Bus 2
RS485
Slave Slave Slave Slave Master
2
Slave Slave Slave Slave
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