Pilz PSS Series Operating Manual page 43

Supply Voltage
• Connecting external power supplys on programmable safety systems
with an INTERBUS interface and a separate supply
- If the PSS supply and the INTERBUS interface are fed from separate
supplies, the two external supplies should be connected as shown in
Fig. 6-3.
L1
N
L1
N
Fig. 6-3: Supplying the programmable safety system and INTERBUS interface
- The external 24 V supply for supplying the PSS must be able to
provide a current of max. 550 mA plus load currents taken from the test
pulse outputs and load currents for SafetyBUS p fibre-optic couplers
(25 mA per fibre-optic coupler).
- The external 24 V supply for supplying the INTERBUS interface must
be able to provide a current of 150 mA.
CAUTION!
The maximum permitted load current at connectors X0 and X2 should not
be exceeded. Connectors X0 and X2 should therefore be fused (see
Fig. 6-3).
6-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
External power supply
~
=
Connect to the 0 V supply and
earth at a single point
External power supply
~
=
(separate power supply)
+24 V
0 V
Connect to the central earth
bar in star form
INTERBUS interface connection
+24 V
0 V
Operating Manual: PSS SB 3006-3 Series
PSS SB 3006-3 series
PSS connection
X0 (PSS PWR)
Functional earth
0 V X1
X2 (IBS PWR)
X2 (IBS PWR)
Functional earth