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If you restore the primary inputs on an ECO422/D while it is currently switched to the backup inputs+ will it automatically switch back to primary?

질문:

If you restore the primary inputs on an ECO422/D while it is currently switched to the backup inputs+ will it automatically switch back to primary?

답변:

The behavioral logic of the ECO422D is described in table 2-3 on page 2-8 of the ECO422D user manual (also shown below). One general rule of thumb is that the unit will NEVER automatically switch to a bad signal; it can only switch to a bad signal if told to do so by the user.

As shown on line 4 of the table below, if both the primary and backup signals are good, no preference is given to either and the unit will not switch back to the primary; the change back to primary must be manually applied by the user.

Ln. #PowerUser Config ModeSwitch ButtonPrimary is…Backup is…Output (auto mode)Output (manual mode)
1OnNormalNo SwitchBadBadNo SwitchNo Switch
2OnNormalNo SwitchBadGoodBackupNo Switch
3OnNormalNo SwitchGoodBadPrimaryNo Switch
4OnNormalNo SwitchGoodGoodNo SwitchNo Switch
5OnNormalSwitchBadBadSwitchSwitch
6OnNormalSwitchBadGoodBackupBackup
7OnNormalSwitchGoodBadPrimaryPrimary
8OnNormalSwitchGoodGoodSwitchSwitch
9OnOverrideNo SwitchBadBadNo SwitchNo Switch
10OnOverrideNo SwitchBadGoodBackupNo Switch
11OnOverrideNo SwitchGoodBadPrimaryNo Switch
12OnOverrideNo SwitchGoodGoodNo SwitchNo Switch
13OnOverrideSwitchBadBadSwitchSwitch
14OnOverrideSwitchBadGoodBackupSwitch
15OnOverrideSwitchGoodBadPrimarySwitch
16OnOverrideSwitchGoodGoodSwitchSwitch
17Offn/an/an/an/aPrimaryPrimary

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FAQ ID 63751

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