CUE relayCUE-8 - Manual (Page 8)

3.2...............................................RS-485 port connection
The relayCUE-8 control port is compatible with RS-485 standard and so it is to be installed on
controller serial ports which are compatible with this standard (i.e. for example on ipCUE-alpha
controller the serial channels S3-S6) or the RS-232/RS-485 converter must be used. Serial port
RS-485 is connected via 5-pin connector Phoenix 3,5 mm.
A typical connection of RS-485 port is shown in the following picture:
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