Installation RS20/22/30/32/40
Release
05
12/2015
53
2.5.2 RS22/RS32: supply voltage and signal contact
The PoE voltage and the signal contact are connected via a 6-pin terminal
block with a snap lock.
The RS22/RS32 devices are supplied with PoE voltage (48 V DC safety low
voltage) via an external power supply unit.
The RS22/RS32 devices fulfill the technical data and the
certifications when using the RPS90/48V LV and RPS90/48V HV power units
from Hirschmann. Only use these power units, to ensure that the
specifications are fulfilled.
Make sure that the external power supply unit you use to provide the PoE
voltage fulfills the following basic prerequisites:
Insulation requirements according to IEEE 802.3af (insulation
resistance 48 V, output to “rest of the world” 2,250 V DC for 1 min.).
Output power < 100 W
Current limitation < 5 A
The power supply unit and the devices with PoE ports form a “limited
power source” according to IEC 60950-1.
The external PoE power supply unit must be able to provide the power
for the connected PDs (Power Devices) and for the Switch.
RPS90/48V LV: connecting the input voltage
With the RPS90/48V LV low-voltage PoE power unit, you connect a DC
supply voltage of 24 V DC to 48 V DC at the input connection.
The supply voltage is connected via pin 1 and pin 2.
First connect the protective conductor to the protective conductor
terminal.
Connect the DC voltage to the 2-pin terminal block.
Use a supply cable with a maximum length of 2 meters to the power
unit.
Figure Pin Assignment Supply voltage range
1 Minus terminal of the supply voltage Low voltage input voltage: 24
V DC to 48 V DC
2 Plus terminal of the supply voltage
Table 12: Connecting the low-voltage supply voltage at PoE power unit RPS90/48V
LV
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