KB Electronics KBRG-255 User Manual

Page 13

FIG. 7A – VOLTAGE

FOLLOWING

ii.

Bidirectional operation using reversing contacts – Connect to terminals "10," "11,"
"12," "13" as per fig. 6.

iii. Bidirectional operation with potentiometer – Connect potentiometer to terminals "10,"

"11," "12" as per fig. 6.

FIG. 6 – MAIN SPEED POTENTIOMETER CONNECTIONS

FORWARD

REVERSE

BIDIRECTIONAL

with REVERSING CONTACT

BIDIRECTIONAL

with SPEED POT

F. Voltage Following – An isolated analog voltage can be used in

lieu of main speed potentiometer. Connect signal to terminals "12"
and "13." Note: Terminal "13" is common. A positive signal with
respect to terminal "13" will produce a positive output to motor. A
negative signal with respect to terminal "13" will produce a
negative output. A 0 to ±10VDC is required to operate control
from 0 to ± full output. WARNING! Do not common multiple
drives without a signal isolator. A bipolar signal isolator, SI-4X
(KB P/N 8801), is available as an option from your distributor.
(See fig. 7A.)

G. Enable – Control may be electronically started and stopped with

Enable circuit. Connect Enable contacts between terminals "8"
and "9." When terminals "8" and "9" are joined, control is in "ENABLE" state. When
terminals "8" and "9" are open, control is in "INHIBIT" state. (See fig. 7B, p. 10.)

IMPORTANT! If Enable is not used, a jumper must be installed between terminals
"8" and "9" or control will not operate. (See Safety Warning on page 1.)

H. Start/Stop Circuit – A standard 3-wire start/stop circuit is provided (terminals "5," "6" and

"7"). This allows a remote momentary 2-button start/stop station to be installed. In this
mode, if AC power is removed, the start button must be used to restart the control. Also,
when the control is in the Timed Current Limit mode (J6 set to TCL) and has "timed out,"
it must be restarted using the start button. (See fig. 7C, p. 10)

IMPORTANT! If the Start/Stop mode is not required, a jumper must be installed
between terminals "5" and "7."

(Note: The Timed CL function will operate only when the start/stop mode is used.)
Control will not start using Start/Stop circuit if AC line voltage is below 20% of nominal
(190V on 230V circuit). (See Safety Warning on page 1.)

Alarm Contacts – S.P.S.T. relay contacts (terminals "3" and "4") are used to signal a
warning or to shut other equipment down if control goes to an Inhibit state. Rating of
contacts are 1A-28VDC, .5A-115VAC. See table 6 for relay control state vs contact state.
(See fig. 7D, p. 10.)