ER-150: HERCULES Metering Power Supply Unit

The ARREL Audio ER-150 HERCULES POWER SUPPLY unit has been conceived to offer to the EURORACK Synthesizer technology the best power supply ever made to obtain the best audio performance. The ER-150 is able to generate the standard EURORACK power supply voltages (stabilized) at very high currents and low ripple (+12 V 3.5 A, -12 V 1.5 A, +5 V 1.5 A).

The power supply is powered by a standard 90W +15 V high quality AC-DC converter (P1L connector, 2.5 mm). The ER-150 is characterized by two protection strategies: output current limit and overtemperature shutdown.

Three leds indicate the presence of the corresponding voltage.

We do not use bulky power ON/OFF switches on the front panel. The ON/OFF function has been implemented by a push button and a high power relay.

A bicolor led is used to indicate stand-by (red=AC/DC converter connected and ER-150 off; green=AC/DC connected and ER-150 ON)

An analog style back-illuminated ammeter is used to measure the current absorption on the three power supply rails in order to be sure to not exceed the maximum output current. In this way, when EURORACK musicians create their EURORACK architecture of modules, they are totally sure that they do not exceed the power supply maximum current ratings.

The ER-150 is equipped with two high power connectors for the connection of two power bus boards (ER-STRIP)

The ER-150 can be used to “extend” the power supply system to another Eurorack synth by using the ER-150-EXT extension module and an extension cable (ER-150-CAB).

The Power brick and the power strip (ER-STRIP) are not included and should be ordered separately.

Power Supply Voltages and Currents:	Stabilized voltages, +12 V 3.5 A , -12 V, 1.5 A, +5 V 1.5 A	ER-150 MAXIMUM CONTINUOUS CURRENT +12 V 3.5 A -12 V 1.5 A +5 V 1.5 A see NOTE below
Protections	output current limit and overtemperature shutdown.
Front Panel Controls	ON-OFF push button ON-OFF relay controlled with dual color led (standby/ON), Back-illuminated Analog Ammeter Selection switch for the current measurement on the three power supply rails. Power Out Connector for extension purposes (ER-150 EXT module (ER-150-EXT) and ER-150 Extension Cable (ER-150-EXT-CAB)
Front Panel Input Connectors	P1L female connector (2.5 mm) for AC/DC converter connection
Output Connectors	Power DIN (R7B) 7.5 A power bus connector on front panel, Two internal high power connectors for the connection of two power bus boards (ER-STRIP)
Front Panel Indicators	Back illuminated analog ammeter, 3 leds for power supply rails
Construction	10U TE Units (50.4mm)
Dimensions	W 50.4 mm, H 128 mm
Weight	150 g

NOTE: the above specifications are related to an ambient temperature of 25 Celsius degrees. Derating must be applied in case of higher ambient temperature. In order to respect this specifications, the ARREL AUDIO power supply modules must be mounted in well vented Eurorack cases and should be mounted not near the case sides (minimum distance 5 mm) in order to permit air flow. The ARREL AUDIO power supply modules should be mounted far from temperature sensitive modules.