5700ACO
Automatic Changeover
Page 22 Revision 1.0
3.3.2. Changeover Rate
DIP switch 2 controls the speed of the decision process before a changeover is made.
Table 3-5 : Changeover Rate Switch Settings
When DIP switch 2 is in the Off position, the ACO takes approximately 250 msec. to decide whether it
needs to change, thus making it very immune to false changeovers in this mode. When DIP switch 2 is
in the ON position, the ACO will decide to change in approximately 100 msec, providing less protection
from false changeovers but quicker response to input faults.
3.3.3. Bank Priority
The bank priority is controlled by DIP switch 3 and DIP switch 4.
Bank A and B have equal priority
Bank A has higher priority
Bank B has higher priority
Table 3-6 : Bank A Priority Switch Settings
When DIP switches 3 and 4 are both in the Off position or both in the ON position, the ACO gives equal
priority to each bank. If the number of valid inputs from each bank is equal, the ACO will not switch.
When DIP switch 3 is in the On position, and DIP switch 4 is in the Off position, priority will be given to
Bank A. If the number of valid inputs from each bank is equal, bank A will be selected.
When DIP switch 4 is in the On position, and DIP switch 3 is in the Off position, priority will be given to
Bank B. If the number of valid inputs from each bank is equal, bank B will be selected.
3.3.4. Change Limiting
Change Limiting is controlled by DIP switch 8 and DIP switch 7.
Table 3-7 : Change Limiting Switch Settings
When DIP switch 8 and DIP switch 7 are in the Off position, the 5700ACO may change an unlimited
number of times depending on inputs when in automatic mode. When DIP switch 7 is in the On
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