Model 5601ACO2 Automatic Changeover Unit
Page 3-4 Revision 1.2 OPERATION
3.2.3. Manual Switch Changeover Mode
To operate the 5601ACO2 in Manual Front Panel mode, push the CHG OVER switch to the Manual
position and the CTL SEL mode switch to the FP (Front Panel) position. The Manual and Front Panel
LEDs will come on. The 5601ACO2 will decide whether to select the A or B inputs based on the
position of the CHG SELECT switch. When the CHG SELECT switch is set to A Master A will be
selected and the A LED will come On. When the CHG SELECT switch is set to B Master B will be
selected and the B LED will come On. The ACTIVE OUTPUT LEDs will also indicate the currently
selected master. The settings made with this switch are saved to the 5601ACO2’s memory, and will be
the same after a power cycle.
3.2.4. Front Door Button: Recent Event Trigger
The pushbutton on the front door shows the last state to have caused a changeover. If the 5601ACO2
is in Automatic mode and a changeover takes place, pressing this button will cause the LEDs to display
the status just before the changeover occurred. The purpose of this is to assist operators in cases
where a signal is lost but then returns before an operator can observe the front panel.
On some earlier units the button is labelled “SELECT”
3.3. DIP SWITCHES
There is an 8 position DIP switch located on the main circuit card inside the 5601ACO2. This DIP
switch is accessible on the main circuit board behind the front panel of the unit. Table
3-1 shows the
assigned DIP switch functions.
Note: Dip switch control is a live function. A power-cycle/reboot is not needed.
The ON position is down.
Table 3-1: DIP Switch Functions
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