Watlow QPAC-01 - AF, AL, BF and BV Control Cards; AF, AL, BF and BV Potentiometer Input; AF, AL, BF and BV DC Input Connections

Starting Out
20
QPAC User's Manual
How to Install and Wire the QPAC, Chapter 2
Input Wiring
Figure 26-
AF, AL, BF, BV
Potentiometer Input
Figure 27 -
AF, AL,
BF and BV
DC Input
Process Input - AF, AL, BF and BV Control Cards
The QPAC AF, AL, BF and BV Control Cards are defined as follows:
AF - Phase Angle Control
AL - Phase Angle Control with Current Limit
BF - Burst Firing (Zero Cross), Fixed Time Base
BV - Burst Firing (Zero Cross), Variable Time Base
All four of these cards can be wired for a manual potentiometer input or an input
from a temperature control. The following paragraphs give the connections for both
configurations including an Auto/Manual configuration where the input can be
switched between manual and temperature control input.
AF, AL, BF and BV Potentiometer Input
For potentiometer input, wire a 1KΩ potentiometer to the “POT”, “+” and “-” connec-
tions of the control card. The wiper of the potentiometer should be connected to the
“+” connection. The control card must be converted to a voltage input by replacing a
jumper. See Page 25.
AF, AL, BF and BV DC Input Connections
The temperature control output to the Control Cards is wired to the “+” and “-” input
terminals of the control card. These cards will accept a 0 to 12VDC, or 0 to 25mA
input signal. They are factory calibrated for 4 to 20mA. If using a voltage or current
range other than this, see Chapter 3, Bias & Gain Adjustments. The control card
can be converted to a voltage input by removing a resistor or replacing a jumper.
See Page 25.
Motherboard Connector
DC Input
+
-
2.19 - 2.75
(56 - 57mm)
Pot
1
5-
+
2.75 - 3.75 (70 - 95mm)
Motherboard Connector
1KΩ Pot
2.19 - 2.75
(56 - 57mm)
CW-
CCW+
Pot
1
5-
+
2.75 - 3.75 (70 - 95mm)