Siemens SIMATIC MICRO-DRIVE PDC600 - Page 18

Power supply for the power unit
You must feed the power supply for the power unit via terminals 4L+ and 4M at the X5050
interface (Figure 3-1 Connections of PDC600 drive controller with pin assignment (Page19)).
NOTICE
A two-pole miniature circuit breaker (2P, 240 V AC, tripping characteristic C, rated current 25 A,
EN 60947-2) according to UL category DIVQ (UL 498) must be inserted in the 4L+ and 4M feed
line.
You can 󹪝nd the article numbers of the miniature circuit breakers to be used in the section
"Accessories/Spare parts" in the System Manual SIMATIC MICRO-DRIVE Drive controller PDC
(https://support.industry.siemens.com/cs/ww/en/view/109797859).
The miniature circuit breaker must be implemented with two poles even when using PELV.
In order for the DC link capacitors to be charged slowly when 4L+ is switched on, we
recommend a primary-switched electronic power supply with current limitation. Only the
required miniature circuit breaker has to be installed between the power supply and PDC, and
not an operational switch.
If 4L+ is switched on via a suitable miniature circuit breaker, the following characteristic
values result:
• Peak current: <900A
• Half value stream width: <500μs
NOTICE
The 4L+ input has no switch-on current limitation. Do not connect the terminals while live. This
must also be observed for any upstream switching devices or miniature circuit breakers.
If, for operational reasons, the supply of 4L+ must be switched, we recommend
implementing an pre-charging input circuit on the installation side. After pre-charging is
󹪝nished, the pre-charging resistor must be bypassed by a suitable circuit before normal
operation is started.
Key data for the dimensioning:
• Zero-signal current consumption 4L+: Approx. 15mA (PDC not in operation)
• Internal DC link capacitance: 4000μF +/-20%
• Pre-charging resistor is rated for the maximum voltage under fault conditions of the power
supply unit ≤60V
When energy recovery is activated, a supply voltage above 57.6 V DC is also permitted. Use
a suitable bi-directional supply to ensure that the voltage at 4L+ never exceeds 60VDC
during operation or under fault conditions.
• The power of the pre-charging resistor must be rated for continuous power (voltage at the
pre-charging resistor is constantly equal to the maximum power supply voltage) or
appropriate measures must be taken to protect against overtemperature/overload.
Product overview
2.3Power supply
PDC600(F)
16 Equipment Manual, 12/2023, A5E50502703-AB