Lf Limitations For Atex - IDENTEC SOLUTIONS iPOINT X Hardware User Manual

iPOINT X – Hardware User Manual | 18.06.2020
2.1.1

LF Limitations for ATEX

Due to Barrier (VCL1520) and cable series resistance, it is not possible to operate LF with full power and 12 slots
all the time. Therefore, LF operation is limited by firmware according to the slot scheme and the restrictions below.
LF slot settings depending on configured LF power:
Configured LF Minimum Delay
power between LF
telegram
0 to 39% 0 ms
40% to 59% 40 ms
60% to 79% 100ms
80% to 100% 500 ms
ATTENTION: This is just an example. If you have other parameters, additional cable length or other voltage drops
between the Barrier and the iPOINT X the settings mentioned above will differ and can end in improper operation of
LF or even the whole device.
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Minimum Description
Cycle delay
10 ms All slots active
10 ms Only 6 slots per frame are active
(1 slot inactive between 2 actives slots)
10 ms Only 2 slots actives per frame
(5 slots inactive between 2 actives slots)
250 ms Only 1 slot per double frame is active
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