Product Description
The PR-PSU-3AC-500-EU is a stand-alone power supply for three-phase mains systems, which
provides a stabilized and galvanically separated PELV/ES1 output voltage. The negative potential of
the outputs is permanently connected to PE within the unit.
The device is incorporated in a housing rated for IP65 and IP67, which provides protection against
electrical, mechanical and fire hazards.
Intended Use
This indoor use device is intended for commercial use, such as in industrial control, process control,
monitoring, measurement or the like.
Do not use this device in equipment, where malfunctioning may cause severe personal injury or
threaten human life without additional appropriate safety devices, that are suited for the end-
application.
If this device is used in a manner outside of its specification, the protection provided by the device may
be impaired.
Do not connect the negative potential of the output to PE outside the unit.
Installation Instructions
Install the device onto a flat surface with the terminals on the bottom of the device. Other mounting
orientations require a reduction in output current.
The device is designed for pollution degree 3 areas in controlled environments.
Install the device on a large enough flat surface so that any sharp edges on the back cannot cause
injury.
Use 4 screws for wall mounting, 2 on top and 2 on bottom mounting holes. Recommended screw size
M4.
The enclosure of the device provides a degree of ingress protection of IP65 and IP67 when installed
with all mating connectors firmly connected.
The device is designed as “Class of Protection I” equipment according to IEC 61140. Do not use
without a proper PE (Protective Earth) connection.
For TN,TT mains systems with earthed neutral and IT star mains systems with insulation monitoring
the device is designed for overvoltage category III zones up to 2000m (6560ft) and for overvoltage
category II zones up to 5000m (16400ft). For TN, TT, IT delta mains systems or IT star mains systems
without insulation monitoring the device is intended for overvoltage category II zones up to 2000m
(6560ft).
The device is designed to be safe in case of a single phase loss and does not require an external
protection.
A disconnecting means shall be provided for the input of the device.
The device is designed for convection cooling and does not require an external fan. Do not obstruct
airflow and do not cover ventilation fins!
The device is designed for altitudes up to 5000m (16400ft). Above 2000m (6560ft) a reduction in
output current is required and the operation is limited according mains systems description above.
Keep the following minimum installation clearances: 50mm on top and bottom, 10mm on the front and
10mm left and right side.
The device is designed, tested and approved for branch circuits up to 20A (UL) and 32A (IEC) without
additional protection device. If an external fuse is utilized, do not use circuit breakers smaller than 6A
B- or C-Characteristic to avoid a nuisance tripping of the circuit breaker.
The maximum surrounding air temperature is +70°C (+158°F). The operational temperature is the
same as the ambient or surrounding air temperature and is defined 2cm below the device.
The device is designed to operate in areas between 5% and 95% relative humidity.
Cleaning only with a damp cloth.
Functional Description
The output is electronically protected against no-load, overload and short circuit and can supply any
kind of loads, including unlimited inductive and capacitive loads. If capacitors with a capacitance
>100mF are connected, the unit might charge the capacitor in an intermittent mode.
Do not apply return voltages from the load to the output terminals higher than 35V. The feed-back
energy must be below 2.5J.
The green DC-OK Led reports an output voltage above 22V of a running device.
The red DC-NOT-OK Led reports an output voltage below 22V of a running device.
The orange OVERLOAD Led is on when the output current is higher than 26A.
The DC-OK relay monitors the output voltage and the contact is closed when the DC-OK LED is on.
Contact ratings: 60Vdc 0.3A, 30Vdc 1A, 30Vac 0.5A for resistive loads.
The device is equipped with an over-temperature protection. In case of a high temperature, the output
shuts down and starts automatically again after cooling off.
The device is designed to deliver an output power of 1000W for up to 5s with nominal output voltage.
The time between pulses should be at least seven times longer than the pulse itself.
Do not connect the outputs of multiple devices in parallel connections for higher output power
Do not connect the outputs of multiple devices in a series connection for higher output voltages.
In case of an internal defect, a redundant circuit limits the maximum output voltage to 32.5V. The
output shuts down and automatically attempts to restart.
Mating connectors:
For the mating input voltage connector (X1) use the connector HANQ4/2 from Harting consisting of
four parts. Use order numbers 19 12 008 0429 (1x housing), 09 12 006 3141 (1x insert), 09 32 000
6204 (4x crimp contacts) and 19 12 000 5156 (1x cable gland). Pin assignment for the input connector
(X1): Pin 1 for L1, Pin 2 for L2, Pin 3 for L3 and the Pin with the PE symbol for PE.
For the mating DC OK signal connector (X2) use a standards M12 A-coded 5 pin female connector.
Pin assignment for the DC OK connector (X2): Pin 1 and Pin 4 for relay contact.
The output voltage terminal (X3) utilizes isolation displacement technology and requires litz wires
according VDE 0295 with a wire size between 1mm2 and 2.5mm2. The gasket of the cable retaining
system is optimized to fit for two cables according to the AS-Interface® standard. Pin assignment for
the output connector (X3): cable 1: Pin 1 for + pole, Pin 2 for –pole; cable 2: Pin 3 for + pole, Pin PE
for –pole. Fasten gland nut with a tightening torque of 7Nm /62 lb.inch.