PMT-24V35W1AX Datasheet, PDF (9/11 Pages) Delta Electronics, Inc. – PMT Panel Mount Power Supply

TECHNICAL DATASHEET
PMT Panel Mount Power Supply
24V 35W 1 Phase / PMT-24V35W1AX
Overload & Overcurrent Protections
The power supply’s Overload (OLP) and Overcurrent (OCP)
Protections will be activated when output current exceeds 120%
of I_O (Max load). In such occurrence, the V_O will start to droop and
once the power supply has reached its maximum power limit, the
protection is activated and the power supply will go into “Hiccup
mode” (Auto-Recovery). The power supply will recover once the
fault condition of the OLP and OCP is removed and I_O is back
within the specifications.
Overvoltage Protection
The power supply’s overvoltage circuit will be activated when its
internal feedback circuit fails. The output voltage shall not exceed
its specifications defined on Page 3 under “Protections”.
Additionally, if the I_O is <120% but >100% for a prolong period of
time (depending on the load), the Over Temperature Protection
(OTP) will be activated due to high temperature on critical
components. The power supply will then go into “Hiccup mode”
until the fault is removed.
Over Temperature Protection
As mentioned above, the power supply also has Over
Temperature Protection (OTP). This is activated when the
overload condition persists for an extended duration and the
output current is below the overload trigger point but >100% load.
In the event of a higher operating condition at 100% load, the
power supply will run into OTP when the surrounding air
temperature is >50°C. When activated, the output voltage will go
into bouncing mode until the operating surrounding air
temperature drops to 50°C or output capacity is reduced as
recommended in the de-rating graph.
Short Circuit Protection
The power supply’s output OLP/OCP function also provides protection against short circuits. When a short circuit is applied, the output
current will operate in “Hiccup mode”, as shown in the illustration in the OLP/OCP section on this page. The power supply will return to
normal operation after the short circuit is removed.
Operating Mode
 Redundancy Operation
In order to ensure proper redundancy operation
for the power supply unit (PSU), ensure that the
output voltage difference between the two units
is kept at 0.45~0.50V for 24V supplies. Follow
simple steps given below to verify:
Step 1.
Measure output voltage of PSU 1 and PSU 2. If
PSU 1 is the master unit, then V_O of PSU 1
must be higher than PSU 2.
In order to set the output voltage, connect the
power supply to 50% load and set the PSU 1
and PSU 2 output voltage.
Step 2.
Connect the right DRR module, 20A as per the
system requirement to the power supply units
PSU 1 and PSU 2 at V_in 1 & V_in 2 respectively.
Fig. 3 Redundancy / Parallel Operation Connection Diagram
Step 3.
Connect the system load from V_out. Please note
that output voltage V_out from DRR module will be
*V_drop will vary from 0.60V to 0.90V (Typical 0.65V) depending on the load current and = VO (output voltage of power supply) – Vdrop* (in
surrounding air temperature.
DRR module).
9
All parameters are specified at 25°C ambient unless otherwise noted.
www.DeltaPSU.com (February 2013, Rev. 01)