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This product should be installed and serviced by a qualified technician, electrician or electrical
maintenance person familiar with its operation and the hazards involved. Proper installation, which
includes wiring, mounting in proper enclosure, fusing or other overcurrent protection and grounding,
can reduce the chance of electric shocks, fires or explosion in this product or products used with this
product, such as electric motors, switches, coils, solenoids and/or relays. Eye protection must be worn
and insulated adjustment tools must be used when working with control under power. This product is
constructed of materials (plastics, metals, carbon, silicon, etc.) which may be a potential hazard.
Proper shielding, grounding and filtering of this product can reduce the emission of radio frequency
interference (RFI) which may adversely affect sensitive electronic equipment. If information is required
on this product, contact our factory. It is the responsibility of the equipment manufacturer and
individual installer to supply this safety warning to the ultimate user of this product. (SW effective
11/92)
This control contains electronic Start/Stop and enable circuits that can be used to start and stop
the control. However, these circuits are never to be used as safety disconnects since they are not fail-
safe. Use only the AC line for this purpose.
The input circuits of this control (potentiometer, start/stop, Inhibit) are not isolated from AC line.
Be sure to follow all instructions carefully. Fire and/or electrocution can result due to improper
use of this product.
This product complies with all CE directives pertinent at the time of manufacture.
Contact factory for detailed installation instructions and Declaration of Conformity.
Installation of a CE approved RFI filter (KBRF-200A, KB P/N 9945C or equivalent) is
required. Additional shielded motor cable and/or AC line cables may be required along with
a signal isolator (SI-4X, KB P/N 8801 or equivalent).
I.
GENERAL INFORMATION.
The KBRG-212D is a full-wave regenerative control, capable of operating a DC motor
(Permanent Magnet or Shunt) in a bidirectional mode. It provides 4-quadrant operation which
allows forward and reverse torque in both speed directions. The drive offers excellent
controllability, which closely approximates the performance of servo-type drives. Ratings and
specifications are presented in tables 1 and 3. Be sure the drive is used within these ratings
and specifications. (Note: Regenerative drives normally produce more motor heating
than standard unidirectional SCR speed controls, especially under low speed operation.
This should be taken into consideration when specifying motor rating.)
WARNING! Be sure to follow all instructions carefully. Fire or electrocution
can result due to improper use of this product. Read Safety Warning.
Input
Model
Voltage
(VAC)
KBRG-212D
II.
OPERATION.
The KBRG-212D will vary motor speed or torque as a function of the signal voltage on input
terminals "SIG" (signal) and "COM" (common). The input voltage can be derived from the
wiper of the main speed potentiometer or from an isolated analog input (voltage following
mode). Since the KBRG-212D is a 4-quadrant regenerative drive, the motor speed will follow
both a positive and negative signal voltage and drive the motor in both the forward direction
and reverse direction. In addition , it will apply both forward and reverse torque in order to
stabilize motor speed.
2
ii. SAFETY WARNING! — PLEASE READ CAREFULLY
TABLE 1 – ELECTRICAL RATINGS
Max. AC
Current
(ARMS)
115
12
230
12
Output Voltage
(VDC)
0 – ±90
0 – ±180
Max. DC Output
Current (ADC)
7.5
7.5
Max. Horsepower
HP, (KW)
3/4, (.5)
1, (1)
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