Rockwell Automation MinPak Plus DC Drives Kits User Manual

Page 26

The Regulator Module provides the following basic funcĆ

tions:

D Full fourĆquadrant operation.

D Major loop armature voltage regulation or speed

(tachometer) regulation

D Linear reference timing for controlledacceleration

anddeceleration

D Current minor loop regulator
D Thyristor gate driver circuits
D Isolatedarmature voltage feedback

D Rectifier andscaling resistors for isolatedcurrent

transformer inputs to provide current feedback

D Start, stop, jog sequencing
D PowerĆup andpowerĆdown sequencing

In addition the Regulator Module allows the use of a variĆ

ety of options that extendthe capability of the basic conĆ

troller. (Refer to Paragraph 6.0.)
5.7.2 Description ĊThe Regulator Module is a printed

circuit boardwhich occupies approximately half of the

Regenerative MinPak Plus controller's Chassis. Directly

behindit there is an isolation transformer which supĆ

plies isolated, lowĆvoltage aĆc power to the Regulator

Module power supplies.

All electrical connections to the Regulator Module are

made with tinĆplated pin connectors. The input/output

arrangement of these pins is intended to physically isoĆ

late the different circuits, thereby minimizing electrical

noise coupling.
All optional external voltage signals which may contain

electrical noise are fedthrough filtering andisolation cirĆ

cuits prior to entering the Regulator Module. Thus, reliĆ

able operation is assuredeven in a noiseĆpollutedinĆ

dustrial environment.
A LargeĆScale IntegratedCircuit (LSI) is incorporated

into the Regulator Module. It drastically reduces the

number of active devices, thereby producing excellent

response characteristics andan exceptionally high reliĆ

ability factor.
Physically the Module has identifications and locations

printedin highĆvisibility white paint. These callouts help

users identify potentiometers, resistors, and areas

where optional Kits are installed.
The Module and all optional Kits have a special covering

to protect the printedcircuits from conductive elements

such as moisture anddust.

Section 6

MODIFICATION KITS

6.0 General Ċ A number of optional features in the form

of Modification Kits are offered with the Regenerative

MinPak Plus controller. Each of these Kits extends the

control of the unit andtailors its operation to specific apĆ

plication needs.
This Section describes the procedures that must be folĆ

lowedto install the Kits. Refer to Table 6.A for an informaĆ

tional listing.

DANGER

INSTALLATION OF MODIFICATION KITS IS TO

BE DONE ONLY AFTER AĆC LINE VOLTAGE IS

DISCONNECTED AND LOCKED OUT AT THE

MAIN DISCONNECT SWITCH. DO NOT INSTALL

KITS WHEN POWER IS APPLIED TO THE REĆ

GENERATIVE MINPAK PLUS CONTROLLER.

SERIOUS PERSONAL INJURY AND EQUIPĆ

MENT DAMAGE COULD RESULT.

CAUTION: Installation of the Modification Kits

shouldbe performedonly by qualifiedelectrical

maintenance personnel familiar with the design

andoperation of this equipment. Damage couldreĆ

sult thru unfamiliarity.

Many of the Modification Kits are designed to make elecĆ

trical connection with the Regulator Module by means of

pinĆtype connectors. These slide up through matching

holes in the Modules that form part of the Kit. (Refer to

Figure 6.1.)

Pins must be parallel

Figure 6.1 - Pin Alignment

A common installation problem is causedby bent, broĆ

ken or incorrectly placedpins. Since improper operation

results, care must be taken. Exact alignment is critical.

Visually check that only one pin extends to the top of

each slot once the connection is made.
Many of the Modification Kits require the removal of one

or more jumpers from the Regulator Module. In such

cases carefully clip the leads on both sides of each jumpĆ

er and discard it. Use a sharp pair of dykes (diagonal cutĆ

ters) to assure a quick, clean cut. Do not twist the tool,

since damage may result.