KB Electronics KBVF-48 - Manual (Page 18)

9.3 MOTOR CONNECTION – Wire the motor to
Terminals “U”, “V”, “W”. The terminals are located
on the upper PC board. See Figure 14, on page
17. Motor cable length should not exceed 100 ft
(30 m) – special reactors may be required – con-
sult our Sales Department.
Note: The drive is programmed to operate
3-phase AC induction motors. For PSC motors,
optional software is required – contact our Sales
Department.
9.4 MAIN SPEED POTENTIOMETER CONNECTION
– The drive is supplied with a 5 kΩ Main Speed
Potentiometer to control motor speed.
WARNING! Do not earth
ground any Main Speed
Potentiometer terminals.
Note: When mounting the Main
Speed Potentiometer, be sure to
install the insulating disc (supplied)
between the potentiometer and the
panel.
9.4.1 Models KBVF-27, 29 – Wire
the Main Speed
Potentiometer to Terminals
“P1” (low), “P2” (wiper), “P3”
(high). The terminals are locat-
ed on the lower PC board.
See Figure 15.
If installing the SIVFR Signal
Isolator, see Section 9.4.2.
9.4.2 Models KBVF-45, 48 – Wire
the Main Speed
Potentiometer to Terminal
Block TB1 on the SIVFR.
For Unidirectional Speed
Operation: Wire the Main
Speed Potentiometer to
Terminals “+5V” (high), “SIG1”
(wiper), “COM1” (low). Motor
direction is selected with a
Forward-Stop-Reverse Switch wired to Terminals “0V” (common of switch), “FWD”, “REV”. See
Figure 16. If a Forward-Stop-Reverse Switch is not used, a jumper must be installed between
Terminals “0V” and “FWD”, of Terminal Block TB1, in order for the drive to operate.
For Bidirectional Speed Operation: Wire the Main Speed Potentiometer to Terminals “+5V”
(high), “SIG1” (wiper), “– 5V” (low). Terminals “FWD”, “REV”, “COM1” must be hard wired
together. See Figure 17.
18
Wiper
Low
High
P1
(Supplied) (Front View)
Main Speed Potentiometer
P3 P2
FIGURE 15 – MODELS KBVF-27, 29
MAIN SPEED POTENTIOMETER CONNECTION
(UNIDIRECTIONAL OPERATION)
REV
High
Stop
-5V
TB
1
+5V 0V FWD
Forward
Wiper
Potentiometer
Main Speed
(5 k)
Low
Reverse
SIG1 COM1
SIVF
TERMINAL
BLOCK
CU
R
VO
LT
J1
FIGURE 16 – UNIDIRECTIONAL MAIN SPEED POTENTIOMETER &
FORWARD-STOP-REVERSE SWITCH CONNECTIONS
(JUMPER J1 INSTALLED IN “VOLT” POSITION)
REV -5V
TB
1
+5V 0V FWD SIG1 COM1
Main Speed
Potentiometer
Wiper
(5 k)
High
Jumper
Low
Jumper
CU
R
VO
LT
J1
SIVF
TERMINAL
BLOCK
FIGURE 17 – BIDIRECTIONAL
MAIN SPEED POTENTIOMETER CONNECTION
(TERMINALS “FWD”, “REV”, “COM1” HARDWIRED)
(JUMPER J1 INSTALLED IN “VOLT” POSITION)