KB Electronics KBAC-48 - Manual (Page 17)

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5.7 Voltage Following Connection –
An isolated* 0 – 5 Volt DC analog
signal input can also be used to
control motor speed in lieu of the
Main Speed Potentiometer. The
drive output will linearly follow
the analog signal input. Wire the
signal input positive lead (+) to
Terminal “P2” and the negative
lead (-) to Terminal “P1”. With
external circuitry, a 0 – 10 Volt DC
analog signal can also be used.
See Figure 13.
*If a non-isolated signal is used,
install the SIAC Signal Isolator
(Part No. 9600). The SIAC accepts
voltage (0 to ±2.5 thru 0 to ±25 Volts DC) or current
(4 – 20 mA DC) signal inputs. See Table 2 on page 8.
See Appendix A on page 27 for SIAC information.
Note: For signal following operation, the Minimum
Speed Trimpot (MIN) must be set fully counterclockwise.
WARNING! The signal input must be isolated
from the AC line. Earth grounding signal wir-
ing will damage the drive and void the warranty.
It is highly recommended that the SIAC Signal
Isolator (Part No. 9600) be installed when using
signal following.
5.8 Enable Circuit Connection – The drive can also be
started and stopped with an Enable circuit (close to
run, open to stop). See Figure 14.
The Enable function is established by wiring a switch or contact in series with the orange Main
Speed Potentiometer lead which connects to Terminal “P2”. When the Enable Switch is closed, the
motor will accelerate to the Main Speed Potentiometer setting. When the Enable Switch is opened,
the motor will decelerate to stop.
WARNING! If the Enable Switch is to be mounted remotely, it is highly recommended that the
SIAC Signal Isolator (Part No. 9600) be installed.
5.9 Run/Fault Relay Connection – The Run/Fault Relay Output Contacts are located at TB2 and can
be used to turn equipment on or off, to signal a warning if the drive is put into the Stop Mode, or a
fault has occurred. See Figure 15.
The Run/Fault Relay Contact status for various drive operating conditions is shown in Table 6.
Table 6 – Drive Operating Condition and Run/Fault Relay Contact Status
Drive
Operating
Condition Description
Run Relay Operation
(Jumper J8 Installed in “R” Position)
(Factory Setting)
Fault Relay Operation
(Jumper J8 Installed in “F” Position)
Normally
Open Contact
Normally
Closed Contact
Normally
Open Contact
Normally
Closed Contact
Power Off Main Power Disconnected Open Closed Open Closed
Run Mode* Normal Drive Operation Closed Open Closed Open
Stop Mode* Selected by Operator Open Closed Closed Open
Fault** Drive Tripped Open Closed Open Closed
*Run Mode or Stop Mode is selected using the Start/Stop Switch. **Overload, I 2 t, Short Circuit, Undervoltage and Overvoltage.
HIGH VOLTAGE! See Warning on Page 14.
Main Speed
Potentiometer
Enable Switch or Relay
Orange (Wiper)
Violet (High)
White (Low)
(Close to Run)
P1 P2 P3
Figure 14 – Enable Circuit Connection
HIGH VOLTAGE!
See Warning on Page 14.
Output Contacts
Run/Fault Relay
Normally Closed
Relay Common
Normally Open
NC
NO
TB2
CO
M
Figure 15 – Run/Fault Relay Output
Contacts Connection