Meyer Sound PSM-2

AC Power

The AC voltage operating ranges for the PSM-2 are

85–134 V and 165–264 V, at 50 or 60 Hz. The PSM-2

performs surge suppression for high voltage transients

and can safely withstand voltages up to 275 VAC.

Continuous voltages above 275 VAC may

damage the unit!

When an AC source is applied to the PSM-2, the

Intelligent AC power supply

•auto-selects the voltage;

•performs surge suppression and minimizes

inrush current;

•filters EMI.

After three seconds, the main power supply is slowly

ramped on. The PSM-2 uses a NEMA L6-20P or IEC 309

male power inlet and satisfies UL, CSA, and EC safety

standards.

Use the following AC cable wiring diagram to create

international or special-purpose power connectors:

brown = hot

blue =

neutral

yellow/green =

earth ground

(chassis)

AC cable color code

If the colors referred to in the diagram don't correspond

to the terminals in your plug, use the following

guidelines:

• Connect the blue wire to the terminal marked

with an N or colored black.

• Connect the brown wire to the terminal marked

with an L or colored red.

• Connect the green and yellow wire to the

terminal marked with an E (or ) or colored

green (or green and yellow).

Power Requirements

The PSM-2 presents a dynamic load to the AC mains

which causes the amount of current to fluctuate between

quiet and loud operating levels. Since different types

of cables and circuit breakers heat up at varying rates,

it is essential to understand the types of current ratings

and how they correspond to circuit breaker and cable

specifications.

The maximum continuous RMS current is the maximum

RMS current in a period of at least 10 seconds. It is

used to calculate the temperature increase in cables,

which is used to select cables that conform to electrical

code standards. It is also used to select the rating for

slow-reacting thermal breakers.

The maximum burst RMS current is the maximum

RMS current in a period of approximately 1 second. It

is used to select the rating for most magnetic breakers.

The maximum peak current during burst is used to

select the rating for fast-reacting magnetic breakers

and to calculate the peak voltage drop in long AC

cables according to the formula

Vpkdrop = Ipk x Total Cable Resistance

Use the table below as a guide to select cables and

circuit breakers with appropriate ratings for your

operating voltage.

sgnitaRtnerruC2-MSP

V511 V032 V001

SMRsuounitnoC.xaM

SMR

A01

SMR

SMRtsruB.xaM

A51

SMR

A81

SMR

tsruBgniruDkaeP.xaM

A22

KAEP

A11

KAEP

A52

KAEP

The minimum electrical service amperage required by a

system of PSM-2s is the sum of the maximum continuous

RMS current for each speaker. We recommend allowing

an additional 30% above the minimum amperage to

prevent peak voltage drops at the service entry.