![background image](http://html1.mh-extra.com/html/omron/v690-series/v690-series_user-manual_741403055.webp)
4-3 Link Unit
4-20
4-3-4 Switch Setting
Turn on/off the switches with a supplied plastic screwdriver. By default, all the
switches are set to a lower position (OFF or RS-485).
♦
♦
♦
♦
Enabling the setting mode (Refer to Section 5-1)
(1) Turn OFF the ANT PWR switch (A) referring to the next page.
(2) Turn ON the SET UP switch (B).
(3) Turn ON the ANT PWR switch (A).
→
The indicator ANT PWR turns on.
→
Then, the setting mode has been enabled.
♦
♦
♦
♦
Enabling the operation mode (Refer to Section 5-1)
(1) Turn OFF the ANT PWR switch (A) referring to the next page.
(2) Turn ON the SET UP switch (B).
(3) Turn ON the ANT PWR switch (A).
→
The indicator ANT PWR turns on.
→
Then, the operation mode has been enabled.
♦
♦
♦
♦
Enabling the RS-422A communication
(1) Turn OFF the 24 VDC power supply of the link unit referring to the next page.
(2) Set the RS-422A/RS-485 switch (C) to RS-422A.
(3) Turn ON or OFF suitably the terminating resistance of RS-422A RD (D) and RS-422A SD (E).
(4) Connect to the signal line terminal.
(5) Turn on the 24 VDC power supply of the link unit.
♦
♦
♦
♦
Enabling the RS-485 communication
(1) Turn OFF the 24 VDC power supply of the link unit referring to the next page.
(2) Set the RS-422A/RS-485 switch (C) to RS-485.
→
RS-422A RD (D) is disabled.
(3) Turn ON or OFF suitably the terminating resistance of RS-422A SD (E).
(4) Connect to the signal line terminal.
(5) Turn on the 24 VDC power supply of the link unit.
(Supplied plastic screwdriver)