MTS 2 and MTS 4 Installation, Con
fi
guration and Basic Service Manual
Site Controller - CAN Bus
Table 8-6
Site Controller - CAN Bus Functionality (Continued)
Unit
Function
•
PSU input air temp.: -30 °C to +100 °C, tolerance: 2 °C.
Alarms:
•
DC Source Fail: Indicating DC input voltage outside limits (below 43 V).
•
DC Out Fail: DC output voltages out of limits.
•
AC Source Fail: Early warning, indicating that the AC input is interrupted
and the PSU starts to operate from DC input source in
≥
15 ms. (if a backup
source is present).
•
Software Fail: Indicating software is corrupted or unable to initialize.
•
Over Temperature: Indicating over temperature detected 5 °C to 10 °C before
shutdown.
•
Fan 1 alarm: Fan 1 not operating (fan has stopped or its running speed is
below speci
fi
cation), PSU has received a high signal (open collector) from
fan tray 1 through fan connector 1.
•
Fan 2 alarm: Fan 2 not operating (fan has stopped or its running speed is
below speci
fi
cation), PSU has received a high signal (open collector) from
fan tray 2 through fan connector 2.
•
Fan 3 alarm: Fan 3 not operating (fan has stopped or its running speed is
below speci
fi
cation), PSU has received a high signal (open collector) from
fan tray 3 through fan connector 3.
Controls:
•
FORCE – DC: Controls the PSU to force the usage of the DC input if usable,
disregard presence of AC. If DC is outside the usable range for the PSU, the
PSU shall indicate an alarm using the DC-fail output. If DC input voltage
comes below 43 V ±2% and if AC is usable the PSU shall take the input
power from AC, disregarding a Force-DC control input.
Force DC operation on a bad DC supply PSU or Battery: Bad DC
supply is de
fi
ned as a DC source where the voltage drops below
43 V for a few milliseconds when the PSU is forced to operate on
DC. In case of a force DC command and bad DC supply the 28.5
V output voltage is allowed to drop down to 27 V for a maximum
of 5 second, while the PSU automatically switches back to AC
mode and the 28.5 V rises from 27 V to 28.5 V. During this
sequence the DC out alarm is suppressed.
•
Fan supply output voltage is also controlled by the CAN Bus in 5 steps from
24 V to 12 V. The highest value is set by CAN Bus or automatically.
•
DC operation only: Prevents AC –fail alarms (and associated LED) from the
PSU on CAN Bus when the PSU is supplied from DC only. If the AC supply
becomes present during DC operation, the AC Source Fail alarm circuit is
automatically be reactivated.
6802800U74-N September 2009
8-11
Содержание DIMETRA MTS 2
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Страница 28: ...List of Procedures This page intentionally left blank xxii 6802800U74 N September 2009 ...
Страница 30: ...List of Processes This page intentionally left blank xxiv 6802800U74 N September 2009 ...
Страница 46: ...Cooling Fans Chapter 1 MTS Overview This page intentionally left blank 1 12 6802800U74 N September 2009 ...
Страница 52: ...Battery Safety Chapter 2 General Safety This page intentionally left blank 2 6 6802800U74 N September 2009 ...
Страница 146: ...Screws Chapter 4 Hardware Installation Figure 4 59 MTS 4 Screws Positions 4 70 6802800U74 N September 2009 ...
Страница 148: ...Screws Chapter 4 Hardware Installation This page intentionally left blank 4 72 6802800U74 N September 2009 ...
Страница 348: ...Base Radio Restoration Chapter 10 Base Radio This page intentionally left blank 10 12 6802800U74 N September 2009 ...
Страница 360: ...PSU TrackID Update Chapter 11 Power Supply Unit This page intentionally left blank 11 12 6802800U74 N September 2009 ...
Страница 474: ...Configuration Chapter 15 Expansion Options This page intentionally left blank 15 44 6802800U74 N September 2009 ...
Страница 476: ...Introduction Chapter 16 MTS 4 Outdoor Enclosure This page intentionally left blank 16 2 6802800U74 N September 2009 ...
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