PSS1250-2-48 G.M. International s.r.l.
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PSS1250-2-48

  1. Products
  2. Power Supply
  3. Power Supply System
PSS1250-2-48
SIL 3 Power Supply System, 48Vdc, 25A not redundant

The Power Supply System type PSS1250-2-48 is an anodized aluminium 7” Rack unit (4U high) suitable to accept 2 plug-in Power Supply Modules type PSM1250 (modules are NOT included in this ordering code). Each PSM1250 module provides 24 Vdc output and PSM1250 modules have their outputs connected in series by internal copper bar, therefore PSS1250-2-48 system provides 48Vdc, 25 A output. The system accepts AC power source from 100 to 264 Vac.

FEATURES

  • SIL 3 for NE Load according IEC 61508:2010 (see ISM0368 for more information).
  • SIL 1 for ND Load according to IEC 61508:2010 (see ISM0368 for more information).
  • Systematic capability SIL 3.
  • AC Input Line: 110 to 240 Vac (±10%) with 48 to 62 Hz frequency.
  • Power factor correction
  • EMC Compatibility to EN61000-6-2, EN61000-6-4.
  • TÜV Functional Safety Certification.
  • Highly regulated output of 48 Vdc - 25 A, due to 24 Vdc out for each PSM1250 module.
  • Under and over voltage alarm monitoring, for each PSM1250 module.
  • 3 over voltage redundant protections, for each PSM1250 module.
  • 85% efficiency @230 Vac input and 48 Vdc output with full load.
  • Fan speed control depending on ambient temperature and output power.
  • High load fuse breaking capability without interrupting operations.
  • 7” Rack unit, 4 U high,anodized aluminium, durable metal enclosure.
  • Tropicalization for electronic components.

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STATUS

 
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Product lifecycle policy (EN)

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Technical Data


Supply
Input voltage 110 to 240 Vac (±10%) with 48 to 62 Hz frequency.
Power Factor Correction (AC input) 0.95 typ.@230Vac, 0.99 typ.@115Vac, full load.
Efficiency @48Vdc out (full load) 0.95 typ.@230Vac, 0.99 typ.@115Vac, full load.
Max. internal power dissipation @48Vdc out (full load) 220 W @ 230 Vac; 250 W @ 115 Vac.
AC input current (sinusoidal at full load) @24Vdc out 14.6A @100Vac input voltage, 12.7 A @115 Vac input voltage, 6.5 A @230 Vac input voltage
Inrush current 74 A peak @ 264 Vac; 64 A peak @ 230 Vac; 32 A peak @ 115 Vac.
AC input connection screw terminal blocks suitable for 4mm2 wires on wall mounting panel.

Isolation (Test Voltage)
Input to Output isolation 2500 Vrms (routine test)
Input to Ground isolation 1500 Vrms (routine test)
Ground to Output isolation 500 Vrms (routine test).
Output or Ground to Fault contact isolation 500 Vrms (routine test)

Output
Voltage 48 Vdc (adjustable from 42 to 56 Vdc). Each PSM1250 output is 24 Vdc (adjustable from 21 to 28 Vdc).
Regulation 0.2 % for a 100 % load change
Stability 0.01 % for a 20 % line voltage change.
Ripple ≤ 250 mVpp.
Output current 25 A nominal (@48Vdc out).
Output power max 1200W (@48Vdc out) and up to 1300 W nominal (@56Vdc out).
Output Rise Time 2.5 s
Dynamic Response 1 ms for 0-100% load change (overshoot ±0.5% of Vout setting).
Connection screw terminals on copper bars suitable for 50A available on wall mounting panel
Hold-up time at full load 40 ms (AC input).
Over voltage protection each PSM1250 output is limited to 30 Vdc plus two redundant crowbars for over voltage protection at 30 Vdc. Therefore, PSS1250-2-48 output is upper limited to 60 Vdc maximum value.

Power good signaling (for each PSM1250 module)
Output good 19.5 V ≤ Vout ≤ 29.5 V (see page 2 for more information).
Indication by Power ON green LED on each PSM1250 module front panel.
Signaling voltage free SPST normally energized relay (contact closed), de-energize in over/under voltage conditions (contact open).
Contact rating 2 A 50 Vac 100 VA, 2 A 50 Vdc 60 W (resistive load).
Connection screw terminal blocks suitable for 1.5 mm2 wires on wall mounting panel.

Environmental conditions

Operating temperature limits -40 to +70°C
Relative humidity limits (up to 55 °C) 95 %, condensing.
Transport, storage temperature limits - 45 to + 85 °C.

Approvals
Type SIL 3 / SIL 1 conform to IEC 61508:2010 Ed. 2. SIL 3 Functional Safety TÜV Certificate conforms to IEC61508:2010 Ed.2, for Management of Functional Safety.

Mechanical
Mounting 7” Rack unit, 4 units high.
Weight 7” fully equipped about 7 Kg, fully equipped with 2 PSM1250.
Location Safe Area.
Protection class IP 20.
Dimensions Width 178 mm, Depth 360 mm, Height 237.30 mm

Data Sheet


Datasheet of PSS1250-2-48 ( EN )

Instruction Manual


Instruction Manual PSS1250-2-48 ( EN )

Declarations of Conformity


EU Declaration of Conformity for PSS1250-2-48, PSS1250-HS-7-48-D-* ( EN | IT )
EU Declaration of Conformity for RoHS, ASBESTOS. ( EN )
Declaration of G3 compliance for D1000_PSD1000-PSD1001-PSD1001C-PSD1004-PSD1220-PSD1220-098 SERIES ( EN )