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Introduction
This is the User’s Guide for Focus 1 (Non-regenerative) series of DC Drives. The Focus
1 is a 2nd generation product of the long-standing Focus series. The Focus 1 was introduced
back in 1980. The Focus 1 non-regen drive remains as a popular single-phase, uni-directional
analog drive for DC motors with power ranges from ¼ to 2HP.
Your Focus 1 is a general purpose non-regenerative DC motor speed controller that is
powered from either 115Vac or 230Vac single phase power. A non-regenerative (single
quadrant) drive is one that can provide motoring torque for acceleration and to overcome rated
loads. There are a great many applications where non-regenerative drives provide the most
economical solution. A non-regenerative drive however cannot slow down a motor faster than
the motors normal coasting rate (unless a Dynamic Braking stop is commanded) nor can it stop
overhauling load situations. For more demanding applications, a sister drive- the Focus 3
Regen (regenerative model), offers full four quadrant operation for bi-directional motor control
and controlled deceleration as well as opposition to overhauling loads.
Focus 1 drives come in two basic model variations- with and without enclosure.
Chassis Model
The model without an enclosure is denoted as a chassis
model. The chassis model is intended for mounting within a
User supplied cabinet and where the User intends to provide
remote Start/Stop and Speed control signals.
Enclosed Model
The Enclosed version comes to you already in a NEMA 1
enclosure that would allow the User to mount the Focus on a
wall or machine surface. The Enclosed version has Power
On/Off Switch, a spring to center Start/Stop switch and the
Speed Control adjustment right on the front cover for
convenient operation. For additional environmental
protection, a NEMA 4/12 option kit is available.
For a complete overview of the Focus 1 product
line and available options, visit our website at:
www.emersonct.com or click the link below:
Focus 1 Catalog Section
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