Basler Electric BE1-11t - Manual (Page 44)

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See Table 5 for a list of settings and their defaults.
Table 5. Contact Input Settings
Setting Range Increment Unit Default
Label User programmable label for the input contact. Used by the reporting function to
give meaningful identification to the input contact. This label can be up to 64
characters long.
Recognition Time 4 to 255 1
*
milliseconds 4
Debounce Time 4 to 255 1
* milliseconds 16
Energized State User programmable label for the energized state of the contact. Used by the
reporting function to give meaningful identification to the state of the input contact.
This label can be up to 64 characters long.
De-Energized
State
User programmable label for the de-energized state of the contact. Used by the
reporting function to give meaningful identification to the state of the input contact.
This label can be up to 64 characters long.
* Since the input conditioning function is evaluated every quarter cycle, the setting is internally rounded to
the nearest multiple of 4.16 milliseconds (60 Hz systems) or 5 milliseconds (50 Hz systems).
If you are concerned about ac voltage being coupled into the contact sensing circuits, the recognition time
can be set higher than one-half of the power system cycle period. This will take advantage of the half-
wave rectification provided by the input circuitry.
If an ac wetting voltage is used, the recognition time can be set to less than one-half of the power system
cycle period and the debounce timer can be set to greater than one-half of the power system cycle period.
The extended debounce time will keep the input energized during the negative half-cycle. The default
settings of 4 and 16 milliseconds are compatible with ac wetting voltages.
Settings for contact inputs can also be entered through the front panel.
See the Terminals and Connectors chapter for an illustration of the programmable output terminals.
Contact output electrical ratings are listed in the Specifications chapter.
Retrieving Contact-Sensing Input Status
Contact input status is determined through BESTCOMSPlus by using the Metering Explorer to open the
Status, Inputs tree branch. BESTCOMSPlus must be online with the BE1-11t to view contact input status.
Alternately, status can be determined through the front-panel display by navigating to Metering > Status >
Inputs.
Contact Outputs
BE1-11t protection systems have eight general-purpose contact outputs (OUT1 through OUT8) and one
failsafe, normally open or closed (when de-energized) alarm contact output (OUTA). Each output is
isolated and rated for tripping duty. OUT1 through OUT8 are Form A (normally open), and OUTA is Form
B (normally closed) or Form A (normally open).The style number determines the type of alarm contact
output. A trip coil monitoring circuit is hardwired across OUT1. See the
Trip Circuit Monitor (52TCM)
chapter for details.
Contact outputs OUT1 through OUT8 and OUTA are driven by BESTlogicPlus expressions for OUT1
through OUT8 and OUTA. The use of each contact output is completely programmable so you can assign
meaningful labels to each output and to the logic 0 and logic 1 states of each output. The
BESTlogicPlus
chapter has more information about programming output expressions in your programmable logic
schemes.
BESTlogicPlus expressions for OUT1 through OUT8 and OUTA drive contact outputs OUT1 through
OUT8 and OUTA. The state of the contact outputs can vary from the state of the output logic expressions
for three reasons:
Contact Inputs and Outputs BE1-11t