Redesign > Traffic engineering > VEW STN24249/L RED DC/DC-converter


Product Information

Two international standards are used to regulate the compliance of electrical and electronic equipment in railway applications:
IEC571, EN50155, (UK) RIA12
RIA 12 (UK) requires overvoltage protection exceeding those of the requirements in the European standards.
The present power supply meets or exceeds all the basic standards.
The device was developed as a pin and functionally compatible redesign to a plug-and-play replacement for power supply type SV STN24249/L and has fully
modular design.
The input modules for the galvanic separation of the input/output voltage are designed for nominal 35V DC.
According to EN50155, the necessary input voltage range is 0.7...1.25 x UN = 24...48V.

The under/over voltage range needs to include both 20V and 60V.
The modules used are designed for 20 V to 60V and are also equipped with an active transient protection, which securely eliminates the RIA12-specificed overvoltage (for 20 mS) of the 3.5V-times of the nominal input voltage of up to 120V, as well as peaks of up to 1800V/50µs.
The MTBF is > 250.000h for the module, which meets the life requirements for railway equipment of 24/d for 30a.
The 19” 3HE insert meets the requirements for vehicle applications is extremely
robust and can resist a vibration load on three axels with and amplitude of 7,5mm at 5-150Hz and acceleration of 20m/s².

Data sheet

Technical Data

PCB-card 100x160mm, frontplate 14TE 3HE
Plug-in DIN 41612 F32
Supply voltage nom. 35 DC, min. 24V DC, max. 48V DC
Power max. 98VA
Efficiency approx. 85%
Temperature range -25... +70°C
Output 24V 3A; 12V 0,25A; ±12V 0,1A; 5V 2A; 5V 0,05A
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