Ametek SurgeX SEQ Manual Del Usuario página 40

6.1.3 Auxiliary Relay
The primary uses of the aux relay are to control other remote turn-on products or to provide status
feedback to a central controller to confirm that the unit has completed the requested operation. Details of
using the aux relay to control other products are covered in the specific applications sections. The aux
relay provides one normally-open contact at the rear terminal block and can handle 1 Amp at up to 30
Volts DC. See Section 3.2 for connection details and Section 5.4 for programming details.
The aux relay has a special use when SEQs are ganged or cascaded together – this is covered in the
sections on ganged and cascaded systems.
6.1.4 Over-Ride Function
The SEQ has an over-ride function that can be used for fire safety and other applications where the
power must be held on or forced off. The over-ride function is programmable so that it can be set to
either force the unit off or force it on. When a signal is applied to the over-ride input the unit will be
forced on or off regardless of the main inputs.
If the unit has been forced off by an over-ride, the Over-Ride Restore menu option determines whether
the unit will power up again or remain off.
There is a special delay which can be used only with an over-ride condition. This allows a faster turn on
(or turn off) than the main delays. It is not recommended to use the special delay with expanded
systems because the auxiliary bank may not turn on (or turn off) in the correct sequence during an over-
ride condition.
The over-ride input can be programmed to accept either a contact closure or applied DC voltage. See
Section 3.2 for connection details and Section 5.2 for programming details.
The over-ride input has a special use when SEQs are cascaded together. This is covered in the section
on cascaded systems. If an over-ride is required with a ganged system, use the over-ride input on the
first SEQ. If an over-ride is required with a cascaded system, use the over-ride input on the last SEQ.
6.1.5 Other Functions
Reading through the programming section is a good way to understand all the functions and options
available in the SEQ. Most of the functions are associated with main operation outlined in this section
above. However, there are some other independent functions that can be selected:
The front panel button can be programmed to be operational, non-operational or operate after a one-
second delay. Choosing the last setting prevents accidental power-up or power-down. See Section 5.5
for more details.
The SEQ has built-in voltage limits that will cause the unit to power down if the line voltage is outside
these limits. The low limit can be set from 90V to 110V and the high limit can be set from 130V to 150V.
See Section 5.6 for more details.
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SEQ/SEQ-1U User Manual
Software Version 2.0
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