Product Description
The PS-240-P4G is a DIN-rail mountable single-phase-input power supply, which provides power for
Power over Ethernet (PoE and PoE+) applications. It injects power to 4 individual PoE channels (IEEE
802.3at) via RJ45 Ethernet ports. In addition, it also provides a DC output voltage for external loads.
Intended Use
This device is designed for installation in an enclosure and is intended for commercial use, such as in
industrial control, process control, monitoring and measurement equipment or the like.
The device is suitable for indoor applications. Outdoor applications are also allowed as long as all
requirements specified in this manual (enclosure, controlled environment, condensation, ...) are met.
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.
Installation Instructions
Install device in an enclosure providing protection against electrical, mechanical and fire hazards.
Install the device onto a DIN-rail according to EN 60715 with the input terminals on the bottom of the
device.
Make sure that the wiring is correct by following all local and national codes. Use appropriate copper
cables that are designed for a minimum operating temperature of 60°C for ambient temperatures up to
+45°C, 75°C for ambient temperatures up to +60°C and 90°C for ambient temperatures up to +70°C.
Ensure that all strands of a stranded wire enter the terminal connection. Use ferrules for wires on the
input terminals. Unused screw terminals should be securely tightened. Use shielded twisted pair
Ethernet cables specified for usage in IEEE 802.3at.
The device is designed for pollution degree 2 areas in controlled environments. No condensation or
frost is allowed.
The enclosure of the device provides a degree of protection of IP20. The enclosure does not provide
protection against spilled liquids.
The device is designed for overvoltage category III zones.
The device is designed as “Class of Protection I” equipment according to IEC 61140. Do not use
without a proper PE (Protective Earth) connection.
The device is suitable to be supplied from TN, TT or IT mains networks. The continuous voltage
between the input terminal and the PE potential must not exceed 300Vac.
The input can also be powered from batteries or similar DC sources. The continuous voltage between
the supply voltage and the PE/ground potential must not exceed 375Vdc.
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 grid!
The device is designed for altitudes up to 2000m (6560ft).
Keep the following minimum installation clearances: 40mm on top, 20mm on the bottom, 5mm left and
right side. Increase the 5mm to 15mm in case the adjacent device is a heat source. When the device
is permanently loaded with less than 50%, the 5mm can be reduced to zero.
The device is designed, tested and approved for branch circuits up to 20A 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.
Do not plug or unplug the device as long as input voltage is present.
Do not unplug the input connectors and the connector for the external loads (53V) more often than 20
times in total.
Functional Description
The output is electronically protected against no-load, overload and short circuit and can supply any
kind of loads according to IEEE 802.3at.
Do not apply return voltages from the load to the output terminals higher than 56V.
The green DC OK LED reports an output voltage above 48V of a running device.
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. In order to fulfill the IEEE
802.3AT requirements, external equipment and wiring connected to the DC OK contact need to have a
minimum isolation strength of 1500Vac to ground.
The device is equipped with an over-current protection for each PoE output channel. If the current
exceeds the output current limitation value, the affected PoE channel will be switched off. Unplug the
affected channel for at least 2s. If the over-current is cleared, the device will operate normally again.
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.
In case of an internal defect, a redundant circuit limits the maximum output voltage to 60V. The output
shuts down and automatically attempts to restart.
The device detects connected PoE loads automatically and will not power connected non-PoE devices
according to IEEE 802.3at.
External equipment and wiring connected to the DC output need to have a minimum isolation strength
of 1500Vac to ground.
