PSH150
user manual rev4
Page 6/15
3 Functional description
PSH150 includes a 1 phase SMPS module with PFC and class II wiring. A converter located on the
secondary side allows the supply of a programmable voltage (5 to 55V), with user settable current
limitation. The output is provided with an active ORing circuit that allows the parallel connection for
redundancy of several units without the need of an external redundancy module.
An auxiliary power supply of 12V/100mA is available.
An external INHIBIT signal can be applied for controlling the output status.
A multifunctional display shows the output parameters and 3 keys can be used for programming the
unit. A dry contact (relay) is related to “DC-OK” status.
RS485 and USB ports are available for remote monitoring and setup.
Pow er pat h
Monit oring and cont rol
EMI
f ilt er
PFC
Input
Isolat ion
10kV
DC
DC
DC
DC
I
U
Out put volt age
and current
m easurem ent
Digit al
fuse
U
Volt age
m easurem ent
Out put
Aux
supply
uCont roller
Modbus/RTU
USB
RS485
I/O
Relay
Inhibit
HMI
Digit al cont rol
DC/DC
convert er
Figure 2: PSH150 simplified block diagram