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SECTION 7 |
Protections
Short Circuit Protection: In the event of a short circuit, the PWM controller will be shut
down and the output will drop to near 0V. The green LEDs will flash. The unit will reset
automatically once the short circuit condition is removed.
Current Limiting: The unit will enter this mode when the load tries to draw more than
the limiting values of currents as shown in the specifications. Under this condition, there
will be loss of voltage regulation and the output voltage will drop. The "PSM Status"
LEDs will, however, remain illuminated, but dimmed. When the overload reaches
approximately 70A for SEC-2450BRM or 56A for SEC-2440BRM or 42A for SEC-2430BRM
(the output voltage will be approximately 5.4V), the unit will shut down (will enter
hiccup mode). The PSM status LEDs will start flashing and PSM status signal for remote
indication will oscillate between high and low. The unit will reset automatically as soon
as the overload condition is removed .
Input Surge Protection: The unit is protected against input voltage surges. In case of
input Spike/Surge, the A.C. Side breaker will trip. The 4A fuse on the module will also
blow.
Fan Failure Warning Indicator And Alarm: If forced air cooling is stopped due to failure
of any one or both the fans, the RED "FAN FAILURE" LED will be illuminated and an
alarm buzzer will be activated. At the same time, a "high" signal will be fed to the opto-
coupler for signaling "fan failure" for remote monitoring. The unit is required to be
switched OFF immediately as loss of forced air cooling may result in major damage to
the unit.
SECTION 8 |
1.
Ensure that the space where the unit is to be installed has adequate air supply for
cooling. There should be no obstruction on the suction vent slots on the sides of the
unit or on the discharge side grilles of the fans on the back of the unit.
2.
Switch OFF the ON/OFF switch on the front panel.
3.
Switch OFF all the D.C. Load(s) to be connected to this unit.
4.
Connect the load+ and load- at the back of the unit to the D.C. Load(s) or the
DC bus.
Ensure the wire or bus bar used to connect the load or the D.C. Bus is of proper
cross-section to carry the desired load current. Tighten the screws to ensure firm
connection.
5.
In case external battery is required for battery back-up, connect the Positive of the
battery to battery + and Negative of the battery to battery -. (See details under "
Operation Of The Battery Back-Up")
6.
Plug the unit into the 120V, 60Hz standard AC outlet. The outlet should be rated at
30A for SEC-2450BRM, 20A for SEC-2440BRM & 20/15A for SEC-2430BRM.
10 | SAMLEX AMERICA INC.
Protections
Installation & Operation
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