Rane FRS 8 User Manual download pdf

OPERATING / SERVICE MANUAL FRS 8

FLEX POWER SUPPLY

GENERAL INSTRUCTIONS

Using the FRS 8 is as easy as it looks, and should not

present any problems. Connect the red outputs of the FRS 8 to

the red input jacks on the products to be powered using the

supplied 6-wire modular connector cables. The power switch

controls all units powered from the FRS 8. Power is applied

immediately upon power switch closure—there is no time

delay power-up sequence.

MOUNTING THE FRS 8

Normally the FRS 8 is mounted in the right-hand most

two slots of the Flex rack. This allows sensitive mic level

products to be mounted in the far left-hand slots to separate

them from the FRS 8 hum field. If there are any blank spots,

always located them next to the FRS 8 for the most hum-free

performance.

Additionally, create as much ventilation space around the

FRS 8 as possible. This is not critical, it is just good practice.

When fully loaded, the FRS 8 requires unrestricted airflow

into the bottom and out the top of the unit for proper cooling.

POWER SUPPLY CABLES

Each FRS 8 is shipped with (8) 6-wire modular plug

power supply cables. Additional power supply cables are

available from the factory or your dealer. Two lengths are

offered, either 24 inches (package of 4), or 6 feet (package of

3). Please specify length when ordering.

CUSTOMIZING POWER SUPPLY CABLE

LENGTHS

Rane makes available a Mod Cable Connector Kit for

customizing cable lengths for each installation. This kit

consists of a modular connector crimping tool (manufactured

by AMP, Inc.), plus (25) 6-pin modular connectors. Cutting

and crimping a new mod connector takes about 60 seconds.

NOTE: 6-WIRE CABLE AND MODULAR CONNECTORS

MUST BE USED FOR ALL INTERCONNECTION.

COMMON 4-WIRE CABLE AND CONNECTORS WILL

NOT WORK. DO NOT SUBSTITUTE 4-WIRE FOR

6-WIRE CABLE AND CONNECTORS.

NOT ENOUGH CURRENT

Each output of the FRS 8 is rated for a continuous current

output of 650 mA. If more than 650 mA is required and you

have an unused output the issue of paralleling arises. Parallel-

ing of outputs is permitted with the FRS 8.

A cute trick that makes this easy is to use a 6-WIRE wye-

adapter (also called T-connector, duplex jack, dual modular

phone coupler, etc.). Plug the single male end into the unit to

be powered, and run two 6-WIRE cables from the duplex

female side into two channels of the FRS 8. This doubles the

available output current from 650 mA to 1.3 A.

TOO MUCH CURRENT

Sometimes you may be tempted to try and power two

units from one output of the FRS 8. If the total current

demand of both units is less than the 650 mA output current,

this daisychaining (running power out of one unit into

another) temptation becomes unbearable. In general, avoid

daisychaining of power supplies. Daisychaining of power

only works between units interconnected by fully balanced

techniques. There can be no signal ground connecting

daisychained units. Failure to follow this rule results in hum

due to an unbreakable ground loop caused by the common

power supply path. Life is simpler if you just say no.

RESETTING TIME

The FRS 8 is protected by solid-state current and tempera-

ture sensing devices that reset automatically. This automatic

resetting takes approximately 15 minutes depending upon the

nature of the overload. If power is lost on an output, discon-

nect the power cable and wait at least 15 minutes before

reconnecting the cable. Meanwhile try to find out why the

unit demanded excessive current (Cable short? Unit failed?

Other?).

CAUTION: THESE SERVICING INSTRUCTIONS ARE

FOR USE BY QUALIFIED PERSONNEL ONLY. TO

AVOID ELECTRIC SHOCK DO NOT PERFORM ANY

SERVICING OTHER THAN THAT CONTAINED IN

THE OPERATING INSTRUCTIONS UNLESS YOU

ARE QUALIFIED TO DO SO. REFER ALL SERVICING

TO QUALIFIED SERVICE PERSONNEL.

All features & specifications subject to change without notice. 520-363 AUG94Printed in the U.S.A. on Recycled Paper

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Page 1

OPERATING / SERVICE MANUAL FRS 8FLEX POWER SUPPLYGENERAL INSTRUCTIONSUsing the FRS 8 is as easy as it looks, and should notpresent any problems. Conne

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