Rs22/Rs32: Supply Voltage And Signal Contact - Hirschmann RS20 series User Manual

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.
Figure Pin
1
1
2
2
Table 12: Connecting the low-voltage supply voltage at PoE power unit RPS90/48V
LV
 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.
Installation RS20/22/30/32/40
Release 05 12/2015
Assignment
Minus terminal of the supply voltage
Plus terminal of the supply voltage
Supply voltage range
Low voltage input voltage: 24
V DC to 48 V DC
53