> Description
The SR is a single output converter rated at 120W with peak capability of 150W. The
construction style is open frame PCB mounted on a aluminium plate for bulkhead fixing
or rack mounting. Compliant with Rail standards.
Special features include:
• Construction is low profile PCB
• Choice of mounting options—Bulkhead or Rack
• Wide input voltage range
> Input Specifications
The following input voltages versions are available as standard:
110Vdc (66.0—137.5V) dc (Suffix A)
83Vdc (48.0—96V) dc (Suffix G)
72Vdc (43.2—90.0V) dc (Suffix D)
52Vdc (31.2—65.0V) dc (Suffix C)
36Vdc (21.0—50.4V) dc (Suffix F)
24Vdc (16.8—33.6V) dc (Suffix B)
Other ranges are available to order
Parameter Detail
Input Ripple To EN50155
Input Protection Reverse polarity protection.
Surges and transients EN50155
Inrush Current Limited to typically 5 x nominal current (after 0.1ms)
Efficiency 75% to 85% dependant on voltage combinations
Input fuse Board mounted. Factory replacement only.
> Output Specifications
Parameter Detail
Maximum Output Power 120W nominal (150W peak power option)
Output Versions Single output only
Output Voltage Can be specified from 5V to 30V
Setting Tolerance +0.6% at 50% load, 15°C to 25°C
Minimum Load Zero for all outputs
Line Regulation + 0.2% all outputs
Load Regulation +
0.5% all outputs
Temperature Coefficient <0.02% / °C
Output Ripple <1% Pk-Pk of Output Voltage
Output Noise <1% Pk-Pk superimposed (up to 20MHz)
Response Time 0.5ms to within 2% (for a 20% - 90% load change)
Output Protection Output lines protected against indirect transients to
EN50155
Current limit Operates at approximately 105% of nominal or peak
load. Auto recovery.
Thermal Protection Shuts down PSU if safe internal temperature is
exceeded. Auto recovery.
Isolation Input to Output 3.0kV dc
Input to Case 1.5kV dc
Output to Case 1.5kV dc
Output to Output 0.5kV dc
>>> September 2010
120W POWERTRON
®
SR SERIES
DC/DC CONVERTER
www.martekpower.com
Parameter Detail
Operating Temperature -25°C to +71°C (no derating)
Storage Temperature -40°C to +85°C
Relative Humidity 95% max.
Shock & Vibration EN 50155 (EN 61373)
Environmental Protection N/A
> Applicable Norms
Parameter Detail
EMC EN50155 (2007), EN50121-3-2 (2006)
Other EN50155 (2007)
> Mechanical Characteristics
Parameter Detail
Construction Open frame PCB—Eurocard or Cold Wall mount-
ing options
Dimensions (Length x Width x Height) L = 160 mm
W = 111 mm
H = 20 mm
Weight 0.5kg
Connections 90° Fast-ons (on H11 Pitch).
Option for Input / output cables
Fixings Four ø M3 tapped holes in base strips.
> Environmental Details
Cooling Convection / Conduction
Option Detail
Connections Input / output cables
(halogen free cable)
Code
Q6
Mounting plate Drawing 753-901 M1
Glebe Farm Technical Campus. Knapwell. Cambridge. CB23 4GG. UK. Tel. +44 (0) 1954 267726. Fax. + 44 (0) 1954 267626. sales@powertron.co.uk
www.martekpower.com
Option Detail
Extended temperature
range
-40°C to +71°C
Code
T
CUSTOMER'S FIXING PLANE
INPUT:
OUTPUTS:
+Ve
+Ve
-Ve
-Ve
-Ve
+Ve
EARTH
+Ve IN
-Ve IN
18mm 127.00
160.00
= = 104.00
111.0020mm MAX
MODEL No.
ISSUE
SERIAL No
CAMBRIDGE ENGLAND
TEL NO:(01223 722000)
POWERTRON LTD.
Issue A
12/01
>>> September 2010