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4-2 How to Wire to Host Device
4-11
4-2-2 How to Wire When Connecting RS-422A/485
(1) 1:1 connection with link unit
To connect an antenna and host device through RS-422A/485, use the link unit. An example below shows the connection of one
antenna and one host device through RS-422A (4-wire).
Microwave
antenna
Station No.
00
Link unit
RS-422A/485 link unit connecting cable
Host device
24 VDC
ground-
ing
Host device
setting
* RS-422A
(4-wire)
* Terminating
resistance
RD ON
SD ON
Link unit set-
ting
* RS-422A
(4-wire)
* Terminating
resistance
RD ON
SD ON