aci INTERFACE Series Installation & Operation Instructions

INTERFACE SERIES
Installation & Operation Instructions
EPC2GB, EPC2FSB
GENERAL INFORMATION
The EPC2 Series are electric to pneumatic
transducers which convert an analog input signal
to a proportional pneumatic output, modulating
its control valve(s) to regulate the branch line
pressure to the set point determined by the input
signal. The EPC2 series o ers four selectable input
ranges. Output pressure ranges are jumper shunt
selectable and adjustable in all ranges. A feedback
signal indicating the resultant branch line pressure
is also provided. EPC2 Series is designed with
electrical terminals on one end and pneumatic
connections on the other, allowing for maximum
convenience in wiring and tubing installation
when panel mounted.
valves (one controls exhaust), does not bleed air at set
point, and has a 750 scim supply and exhaust. Its
branch exhaust ow and response time are not limited
by an internal restrictor and are similar to its load rate.
If power fails to the EPC2, branch line pressure remains
constant if the branch line does not leak air. The
EPC2FS shares the same speci cations as the EPC2
except its 3-way branch valve will exhaust branch line
air upon power failure.
MOUNTING INSTRUCTIONS
The EPC2 has 4 mounting holes, 2 located on the
bottom ange, and 2 on the top ange. Drill pilot
holes for the Mounting Screws(not supplied). Use
the enclosure ange as a guide. Mount the unit
vertically with the brass ttings pointing towards the ground. This ensures that any condensation that may
form in the tubing does not have an e ect on the pressure sensor. If mounting the unit horizontally, care
must be taken to prevent moisture from building up in the sensor.
WIRING INSTRUCTIONS
PRECAUTIONS
• Remove power before wiring. Never connect or disconnect wiring with power applied.
• When using a shielded cable, ground the shield only at the controller end. Grounding both ends
can cause a ground loop.
• It is recommended you use an isolated UL-listed class 2 transformer when powering the unit
with 24 VAC. Failure to wire the devices with the correct polarity when sharing transformers may
result in damage to any device powered by the shared transformer.
• If the 24 VDC or 24VAC power is shared with devices that have coils such as relays, solenoids, or
other inductors, each coil must have an MOV, DC/AC Transorb, Transient Voltage Suppressor (ACI
Part: 142583), 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. Without these snubbers,
coils produce very large voltage spikes when de-energizing that can cause malfunction or
destruction of electronic circuits.
• All wiring must comply with all local and National Electric Codes.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: 1-888-967-5224 | Website: workaci.com
The EPC2 incorporates two
FIGURE 1: DIMENSIONS
3.34in
84.90mm
4.30in
109.22mm
Page 1
Phone: 1-888-967-5224
Website: workaci.com
4.44in
112.78mm
Version: 4.0
I0000637