schmersal PSC1-C-10 Series, Руководство по установке

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Installation manual
PSC1-C-10 Installation manual V2.6 Page 103 of 173
Version: 57E
5.7 External 24 VDC power supply
The PSC1 module requires a power supply of 24 VDC (on this topic see SELV or PELV, EN50178). During
the planning and installation of the power supply unit to be used, attention is to be paid to the
following boundary conditions:
It is imperative the minimum and maximum tolerance on the supply voltage is observed.
Nominal voltage DC 24 V
Minimum: 24 VDC – 15% 20.4 VDC
Maximum: 24 VDC + 20% 28.8 VDC
To achieve residual ripple on the supply voltage as low as possible, the usage of a 3-phase power
supply unit or an electronically regulated unit is recommended. The power supply unit must satisfy the
requirements according to EN 61000-4-11 (voltage drop).
The connection cable must be designed according to the local regulations.
The PSC1 module can withstand an external voltage of 32 VDC (protected by suppressor diodes on the
input).
Safety instructions:
•
The PSC1 module must be fused individually according to the data sheet.
Recommended type: 3.15A circuit breaker (class B) or fuse (slow).
Remark:
In all circumstances, safe electrical isolation on relation to 230 VAC or 400 VAC mains must be ensured.
For this purpose, power supply units are to be selected that satisfy the standards DIN VDE 0551, EN
60742 and DIN VDE 0160. Along with the selection of a suitable unit, attention is to be paid to
equipotential bonding between PE and 0 VDC on the secondary side.