KB Electronics KBRG-212D - Manual (Page 6)

6
3 INTRODUCTION
Thank you for purchasing the KBRG-212D. KB Electronics is committed to providing total
customer satisfaction by producing quality products that are easy to install and operate. The
KBRG-212D is manufactured with Surface Mount Technology (SMT), incorporating advanced
circuitry, components and technology.
The KBRG -212D has an Enable (EN) / Inhibit (INH) mode. The 212D version is factory set (J9
jumper) to Enable (EN). If the user requires the 213D Inhibit (INH) mode, the jumper, J9, is
moved to that position.
The KBRG-212D is a full-wave regenerative drive capable of operating DC PM (Permanent
Magnet) or Shunt motors in a bidirectional mode. Its 4-quadrant operation provides forward and
reverse torque in both speed directions. This allows the control to maintain constant speed with
overhauling loads and provides rapid instant reversing and controlled braking. Because of its
excellent controllability and response time, the KBRG-212D can replace servos in many
applications. The control is factory set for armature feedback, which can provide 1% load
regulation over a motor base speed of 50:1. However, tachometer feedback is also available if
superior regulation is required. By resetting mode jumper J5 to the “TRQ” position, the
KBRG-212D can be changed from a speed control to a torque control.
In addition, the KBRG-212D is used to isolate, amplify, and condition DC voltage signals from
any external source (power supplies, motors, tachometer generators, transducers, and
potentiometers). The KBRG-212D also provides isolation for motor direction switching and an
isolated power supply for transducer or potentiometer operation.
All input and signal connections are made via Terminal blocks and are electrically isolated from
AC line and motor wiring.
The KBRG -212D features an Enable (EN) and Inhibit (INH) function (J9). Having both these
features allows the drive to be used in applications that previously used the KBRG-212D
(Enable) or the KBRG-213D (Inhibit). The control can be electronically stopped and started with
the Enable / Inhibit circuit. (The Enable circuit functions opposite to that of the inhibit circuit;
Inhibit: open to start, close to stop, Enable: open to stop, close to start).
The drive contains a variety of “selectable” jumpers and adjustment trimpots to allow for
custom tailoring for exact requirements.
Another important feature is the LED indicators (PWR ON, OL), which indicate the mode of
operation the drive is in, and also serves as a diagnostic tool.
Reliability of the KBRG-212D is further enhanced with the use of high speed current limiting
and MOV transient protection. A 5kΩ remote potentiometer and full operating instructions are
supplied. See Figures 1 and 2, on pages 10 and 11. In addition, see Tables 1 – 6, on pages
7 – 9.
WARNING! BE SURE TO FOLLOW ALL INSTRUCTIONS CAREFULLY. FIRE
OR ELECTROCUTION CAN RESULT DUE TO IMPROPER USE OF THIS PRODUCT. READ
SAFETY WARNING ON PAGE 5.