AUTOMATION COMPONENTS, INC Version : 2.0
2305 Pleasant View Road Page 1 of 2 I0000479
Middleton, Wisconsin 53562 (888) 967-5224
www.workaci.com
Installation and Operation Instructions
EPC
Analog Current or Voltage Input to Modulated Pressure Output
With Bleed Orifice
INSTALLATION
READ THESE INSTRUCTIONS BEFORE YOU BEGIN INSTALLATION.
Ground yourself before touching board. Some components are static sensitive.
Mounting:
Circuit board may be mounted in any position. If circuit board slides out of snap track, a non-conductive
“stop” may be required. Use only fingers to remove board from snap track. Slide out of snap track or push
against side of snap track and lift that side of the circuit board to remove. Do not flex board or use tools.
POWER CONNECTIONS – THIS PRODUCT ACCEPTS 24 VDC OR 24 VAC POWER
.
Be sure to follow all local electrical codes. Refer to wiring diagram for connection information.
Be sure to make all connections with the power off
.
1.) DC Power – Refer to wiring diagram for connection information.
If the 24 VDC power is shared with devices that have coils such as relays,
solenoids, or other inductors, each coil must have an MOV, DC Transorb, or diode
placed across the coil or inductor. The cathode, or banded side of the DC Transorb
or diode, connects to the positive side of the power supply.
2.) AC Power – Refer to wiring diagram for connection information.
Check the wiring configuration of any other loads that may be connected to this
transformer. If required by BAS or controller specification, the 24 VAC neutral can
be
earth grounded at the transformer. Analog input, digital input, and analog output
circuits should not be earth
grounded at
two points. Any field device connected to
this transformer must use the same common. If you are not sure of other field
device configuration, use separate transformers for isolation.
If the 24 VAC power is share with devices that have coils such as relays, solenoids,
or other inductors, each coil must have an MOV, AC Transorb, or other spike
snubbing device across each of the shared coils. Without these snubbers, coils
produce very large voltage spikes when de-energizing that can cause malfunction or
NOTE
#1
Power
(+)
(-)
Analog Input Signal
(+)
(-)
Branch Pressure
Feedback Signal
Override Feedback
(Dry Contact)
Manual Override Pot
and Manual/Auto
Switch
Offset Pot - Set for minimum desired
pressure with minimum input signal
Span Pot - Set for maximum desired
pressure with maximum input signal
Zero Pot is Factory Set - Do not adjust
SEE
NOTE
#1
(+)
A
B
C
J2
0-10 psi
A
B
C
J2
0-15 psi
A
B
C
J2
0-20 psi
10V
15V
J1
5V
20mA
0-5 VDC
10V
15V
J1
5V
20mA
0-10 VDC
10V
15V
J1
5V
20mA
0-15 VDC
10V
15V
J1
5V
20mA
0-20mA
Pressure Output Range Selector
Signal Input Range Selector
