KB Electronics KBVF-23P - Manual (Page 32)

WARNING! Do not earth
ground any Main Speed
Potentiometer terminals.
Note: When mounting the Main Speed
Potentiometer, be sure to install the insulat-
ing disc (supplied) between the poten-
tiometer and the panel.
9.5 Voltage Following Connection – An iso-
lated* 0 – 5 Volt DC analog signal input can
be used to control motor speed in lieu of
the Main Speed Potentiometer. The drive
output will linearly follow the analog signal
input. Connect the signal input positive lead
(+) to Terminal “P2” and the negative lead
(–) to Terminal “P1”. The terminals are locat-
ed on the lower PC board. With external
circuitry, a 0 – 10 Volt DC analog signal can
also be used. See Figure 18.
*If a non-isolated signal is used, install the
SIVFR — Signal Isolator (Part No. 9597).
The SIVFR accepts voltage (0 to ±2.5 thru
0 to ±25 Volts DC) or current (4 – 20 mA
DC) signal inputs. See Section 3.5, on page 13.
Note: For signal following operation, the Minimum Speed Trimpot (MIN) must be set fully
counterclockwise.
32
FIGURE 18 – VOLTAGE FOLLOWING CONNECTION
0 – 5 Volts DC (Isolated) 0 – 10 Volts DC (Isolated)
P1 P2 P3
0 - 5
Volts DC
+
-
V
P1 P2 P3
0 - 10
Volts DC
V
+
-
10k
10k
Wiper
Low
High
P1
(Supplied) (Front View)
Main Speed Potentiometer
P3 P2
FIGURE 17 – MAIN SPEED
POTENTIOMETER CONNECTION