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Before you start the installation, it is important to consider how each xControl LCD will be connected in order to receive power and allow data transfer. The infrastructure must be designed and installed correctly, in order to provide reliable and error-free performance.
Each xControl LCD requires an EIA-485 connection to a NION. As this connection handles both the supply of power and the transfer of data, no separate power cable is required. A single EIA-485 network can support a maximum of 32 devices. Therefore, up to 31 xControl LCDs can be daisy-chained together, with just the first unit connected to the NION.
Each xControl LCD requires approximately 30mA of power to operate. The NION RS-485 port can supply a maximum of 0.5A (see RS-422/485 serial port in RS-485 mode in the NION Hardware Manual). Therefore, up to 16 devices can be daisy-chained directly to the port. In order to connect additional devices, an external power supply is required.
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