Psu Fan Control; Alarms And Controls Available Through Psu Can Bus Interface - Motorola DIMETRA MTS 2 Installation, Configuration And Basic Service Manual

MTS 2 and MTS 4 Installation, Configuration and Basic Service Manual

PSU Fan Control

There are three fan supply outputs with LED indicators. Three fan connector outputs supply three fan kits
with two fans connected in parallel in each fan tray. The specifications for a FAN output are:
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The Fan supply output voltage is linear dependent on the total power delivered by the PSU and the
ambient temperature. The fan supply starts with 24 V output for a few seconds.
For PSU LED indications refer to
There are several MMI commands which let us to control fans:
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The commands above are described in the MTS Man Machine Interface Commands manual.

Alarms and Controls Available Through PSU CAN Bus Interface

The alarms available through the CAN Bus for fans are:
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The controls available through the CAN Bus for fans are:
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6802800U74-N September 2009
Output Voltage: from 12 to 24 VDC ± 5 %
Output Current: 1 A for each fan connector output
"PSU Indicators (LEDs)" on page 11-6
psu # get fan_voltage
psu # set fan_speed
psu # get fan_speed
psu # set fan_config
psu # get fan_config
psu # start_fan
Fan 1 alarm: Fan 1 not operating, PSU has received a High signal (open collector)
from fan tray 1 through fan connector 1.
Fan 2 alarm: Fan 2 not operating, PSU has received a high signal (open collector)
from fan tray 2 through fan connector 2.
Fan 3 alarm: Fan 3 not operating, PSU has received a high signal (open collector)
from fan tray 3 through fan connector 3.
No Fan 1: Prevents Fan 1 alarm (and associated LED) when no fan 1 is configured.
No Fan 2: Prevents Fan 2 alarm (and associated LED) when no fan 2 is configured.
No Fan 3: Prevents Fan 3 alarm (and associated LED) when no fan 3 is configured.
PSU Fan Control
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