Artesyn SAM1411 Installation and Use (September 2014) - Manual (Page 35)

Shelf Manager Hardware
SAM1411 Installation and Use (6806800M91B) 35
2.4 Power Supply
The SAM1411 is powered by dual redundant +12 VDC feeds, one from each of the PEMs. This
+12 VDC is derived from the -48 VDC feed to each PEM. Each of the two +12 V feeds are
separately fused with a 2 A fuse.
The power supply is compliant with the requirements of the PICMG3.0 R3.0 (AdvancedTCA)
specification. Each of the four power connections is separately fused. Fuse rating is 1A.
An EMI filter at the power input ensures conducted emission levels below EN 55022 class B.
2.4.1 Onboard and External Supply
The SAM1411 has no provisions to switch off the power input. The board is powered when the
power input to either PEM is in the operating range of -40.5 V to -72 V.
An on-board DC/DC-converter supplies all onboard circuitry, and provides 3.3 V power supply
to external circuits with a consumption of not more than 4.2 W.
The board satisfies the standby power limit of 10 W for AdvancedTCA FRUs, even when
supplying 4 W to external loads. Typical power consumption of the SAM1411 board is 2 .3W.
2.4.2 Power Supply Holdup
The SAM1411 complies with the requirements for board level voltage transients as described
in chapter 4.1.4.3. of PICMG 3.0 (AdvancedTCA) specification.
It satisfies the requirement of uninterrupted operation during a power failure of 5ms, while
supplying 4W to external circuits.
2.5 Frame Ground and ESD
Frame ground connection is provided by the backplane connector FrameGND.
The face plate mounting holes of the board are connected to frame ground.
An ESD strip according to the AdvancedTCA specification PICMG 3.0 R3.0 for rear transition
modules (RTMs) is provided at one edge of the PCB.