T1200
MARINEC-P-A
3 02/14
PAGE 36 of 67
o Low Battery voltage (<15.7V ±0.4V).
o Battery and inter-connection resistance is
greater than or equal to 1Ω.
iv) A yellow ‘Charger Fault’ LED. This could be
due to any of the following conditions:
o A mains fault exists (described below).
o Switching regulator or charger circuitry is
malfunctioning.
o Battery fuse blown.
o Open or short circuit fault of Thermistor.
o The power supply output voltage has been
incorrectly set to a value less than the
terminal voltage of the batteries.
v) A yellow ‘Mains Fault’ LED. This indicates that
the mains voltage has failed or is less than the
required minimum for correct operation of the
power supply [80% of the rated voltage].
14.2.7 Fault Conditions
The control and monitoring circuitry for the 1.5A
110Vac and 230Vac mains powered PSUs
communicates all faults to the microcontroller on
the C1626 motherboard. The microcontroller then
operates the necessary indications on the display
and activates the fault outputs.
14.2.8 Battery Disconnect
The PSUs provide a battery disconnect facility
which disconnects the batteries when the battery
terminal voltage falls below 21.2V ±0.53V. This will
occur under the following conditions:
• A short-circuit across the battery terminals.
• Prevention of deep discharge of the batteries if
supplying the panel for an abnormally long
period of time.
The batteries are reconnected when the mains
voltage is present and the battery voltage is greater
than 18.5V +/-0.46V.
14.3 PS40-1-09 and PS136-1-09 Power
Supplies
14.3.1 PS40-1-09, T1204 24 Vdc PSU
The PS40-1-09 is intended for use on vessels using
24Vdc power supply installations. This self-
contained PSU is located within the T1204 panel
enclosure on the chassis under the C1626
motherboard. See Figure 4 – T1204 Panel –
General Assembly.
NOTE: This PSU contains a fan which runs
continuously to maintain a constant air flow inside
the enclosure. This fan creates a low continuous
humming noise which will change pitch depending
on the current being drawn from the PSU. The fan
has an operational life of at least 5 years and failure
of the fan will not cause the PSU to fail
immediately.
14.3.2 PS136-1-09, T1216-C and T1232-C
4A 110/230Vac PSU
The PS136-1-09 4Amp 110/230Vac switch-mode
PSU is a self-contained unit and is located within
the panel enclosure on the chassis under the
motherboard. The stand-by batteries are
accommodated in a separate enclosure. See Figure
5 – T1216-C Panel – General Assembly.
NOTE: This PSU contains a fan which runs
continuously to maintain a constant air flow inside
the enclosure. This fan creates a low continuous
humming noise which will change pitch depending
on the current being drawn from the PSU. The fan
has an operational life of at least 5 years and failure
of the fan will not cause the PSU to fail
immediately.
14.3.3 Input Supplies
PS136-1-09 AC mains supply version:
This PSU requires a supply input of 110-230Vac
rms. The PSU is auto-ranging. The AC supply is
monitored for failure or brownout. A supply fault
condition is indicated if the AC supply is below the
brownout limit of approximately 80V and the unit is
unable to maintain normal output.
PS40-1-09 DC primary supply version:
This PSU works with a DC supply input in the range
18Vdc to 31.2Vdc [nominal 24Vdc].
14.3.4 Fusing
On both AC and DC versions, the battery is
connected through a 20mm T8AH230V replaceable
fuse located on the PSU PCB.
PS136-1-09 AC mains supply version:
The PSU is protected by a fuse link fitted to the live
(L1) incoming feed. This fuse is not replaceable by
the user.
PS40-1-09 DC primary supply version:
The PSU is protected by a fuse link fitted to the
positive (DC+) incoming feed. This fuse is not
replaceable by the user.
14.3.5 DC Output
PS136-1-09 AC mains supply version:
The PSU can provide 27.3Vdc @ 4A continuously.
The output provides power for the battery charger
and the 27.3V load outputs.
The current limited constant voltage charger output
is compatible with Power-Sonic sealed lead acid
batteries.
PS40-1-09 DC primary supply version:
The PSU can provide 27.3Vdc @ 1.5A
continuously. This output provides power for the
battery charger and the 27.3V load outputs.
The current-limited constant voltage charger output
is compatible with Power-sonic sealed lead acid
batteries.
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