Chapter 5 Communication Interfaces
2 3
5.5 Dry
Contacts
The RT UPS provides one input dry contact for you to receive external control
signals. You can set up relevant items in the
Dry Contact Setting
screen, which
includes Disable/ ROO/ RPO/ Remote shutdown/ Forced bypass/ On generator.
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events. The output dry contacts are normally open (NO). You can set up relevant
items in the
Dry Contact Setting
screen, which includes Disable/ On bat/ Low
bat/ Bat fault/ Bypass/ UPS OK/ Load protected/ Load powered/ General alarm/
Overload alarm. Please refer to
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and
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for relevant information.
Function of Input Dry Contacts:
Function
Description
Disable
No function
ROO
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is 999 seconds. (Cold start is prohibited while using the ROO
function)
When contact changes from open to closed, UPS is switched
on.
When contact changes from closed to open, UPS is switched
Rႇ
For example, set time delay is 30 seconds.
UPS is off
Open
Time
delay
30s
Contactor changes
from open to close
Contactor changes
from closed to open
30s
Time
delay
Close
Contactor
UPS is off
UPS is on
NOTE :
1. During time delay, if UPS receive other On/ Off
command via button or contactor, UPS should still
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the next action.
2. For this item, there is no setting for “Normal
Open” or “Normal Close”.
