Power supplies target railway, harsh environments

The PU20 (dc) and the PU21 (ac) power supplies target onboard or wayside railway applications as well as other harsh environment applications. Designed with conformal coated electronics as well as an H15 rear connector, they are protected from both moisture and vibration.

The PU20 power supply automatically detects input voltage for 24, 72 and 110 Vdc and can be manually configured for 36, 48, 74 and 96 Vdc inputs. The PU21 offers an input voltage range from 100 Vac to 240 Vac. Output power for each unit is 125 W at the standard output voltage of 5 V, while standby power is 5 W at 5 V. An integrated microcontroller monitors the ports, voltage as well as temperature. These pluggable power supplies are offered in single Eurocard format (3U) and are designed for use in 19-in. systems such as CompactPCI, CompactPCI serial and VMEbus, and need only 6 HP at the front. They have an operating temperature range from –40° to +85°C.