FIGURE 3: PNUEMATIC TUBING
INSTALLATION
FIGURE 4: PRESSURE OUTPUT JUMPER SETTINGS
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: 1-888-967-5224 | Website: workaci.com
Page 3
Version: 4.0
I0000182
WIRING INSTRUCTIONS (Continued)
The gauge port will accept a miniature 1/8”-27 FNPT back-ported pressure gauge to allow direct reading of
branch line pressure. The gauge should be sealed by Teon sealing tape, and should be tightened just
snug, using a backup wrench to hold the manifold.
Warranty does not include malfunction due to clogged valve. Main air port is ltered with the supplied 8
micron integral-in-barb lter. Periodically check the lter for contamination and ow reduction, and clean
with a brush or replace if needed (Part # PN004).
The surface between the manifold and pressure transducer is a pressure seal. DO NOT stress the circuit
board or allow the manifold to move. Hold the manifold in one hand while installing pneumatic tubing
onto the barbed ttings and use care when removing tubing to avoid damaging ttings or moving
manifold. Minimize stress between the circuit board and the manifold by holding the manifold in one hand
while installing pneumatic tubing onto the ttings, and use care when removing tubing to avoid
damaging ttings or moving manifold.
The bleed orice can be unscrewed with a ¼” hex nut driver for cleaning or inspection. Do not lose the
sealing gasket or insert anything into the precision orice. Clean by swabbing with a degreaser and
blowing clean air through the orice from the opposite direction. The color of the hex nut indicates orice
size: Brass = 0.007”.
This unit requires at least two cubic inches (minimum) of branch air line capacity (approx. 15’ of ¼” O.D.
polyethylene tubing) to operate without oscillation. Main air must be minimum of 2 psig above highest
desired branch output pressure.
Note: The input signal will not cause“wrap around”or start over if the upper range limit is exceeded.
CHECKOUT
SIGNAL INPUTS:
Version #1 & 4: See Figure 4 (p.4). Connect
the pulse input positive (+) to the down (DN)
terminal, and common to the signal common
(SC) terminal. Version #2: Solidyne PWM
signal and 0-10 second Duty Cycle Pulse of
Barber Colman ™, Robershaw ™. No pulse
within 10 seconds = minimum output. Pulse
equal or exceeding 10 seconds = maximum
output.
The EPW is factory calibrated at 0 psig
minimum and 15 psig maximum output. This
output can be re-calibrated to match the
pressure range of the actuator using the GAIN
and OFFSET potentiometer as follows: (Note:
The ZERO potentiometer is factory set. Do not
adjust.)
1.) Setting the input timing range: With power removed, place jumpers in the conguration that most
closely matches the timing range from the controller.
2.) Setting the output pressure range: Apply power. Choose a pressure range on the EPW that matches
or is just above maximum range of device being controlled. Example: 8-13 psi choose B (15 psi setting).
3.) Setting the maximum pressure: With all pneumatic and power connections made, place the Manual
override switch in the“MAN” position. Turn the override pot full clockwise.
4.) Setting the oset: Conrm no pulse has been sent, or remove power to reset output to minimum.
Place the Manual override switch in the “AUTO” position. Turn the “OFFSET” pot until the desired
minimum pressure is achieved.
5.) Calibration can also be made by sending the appropriate timing pulse and adjusting the“OFFSET”and
“SPAN” pots to the desired pressure output.
Without power, the power and the status LED will not be illuminated. Apply power and the“STATUS” LED
will blink slowly (twice per second), and the EPW will be at the lowest signal input state, or 0 psig. Apply
minimum and maximum input signals and measure the response. Version #1 Operation: The “STATUS”LED
will ash quickly when the EPW is receiving an input pulse, at the rate of the minimum resolution of the
selected pulse range, (i.e. 0.1 to 25.5 second range, the LED will ash 0.1 second on, 0.1 second o).
Exception: 0.59 to 2.93 sec. range – LED remains constant. Version #2 Operation: 0.023 – seconds – 1 ash,
the pulse. 0 -10 second Duty Cycle – 3 ashes, then pause. The input signal will NOT cause“wrap around”
or start over if the upper range limit is exceeded. Version #4 Operation: Same as Version #1 except output
is reverse acting.
The pneumatic output changes when the input pulse has been completed. Pressure output between the
minimum and maximum values will be linear, therefore
software algorithms should be easy to derive. The feedback
signal range on all selections is 0 to 5 VDC and is
proportional to the output pressure range (Factory
calibrated 0-15 psig).
The EPW is a constant bleed interface and utilizes a precision
orice to maintain a measured ow of air across the valve.
Manual override: Switch the AUTO/MAN toggle switch to the
MAN position. Turn the shaft on the MAN pot to increase or
decrease the pneumatic output. Return AUTO/MAN switch
to AUTO position when nished.
Override Terminals (OV)
When manual override switch is in manual position, contact
between terminals is closed. When manual override switch
is in auto position, contact between terminals is open.
WARRANTY
The EPW Series is covered by ACI’s Two (2) Year Limited Warranty,
which is located in the front of ACI’S SENSORS & TRANSMITTERS
CATALOG or can be found on ACI’s website: www.workaci.com.
W.E.E.E. DIRECTIVE
At the end of their useful life the packaging and product
should be disposed of via a suitable recycling centre. Do not
dispose of with household waste. Do not burn.
A
B
C
J2
A
B
C
J2
A
B
C
J2
0 to 15 psig
(Factory Setting)
0 to 10 psig 0 to 20 psig
Min Tubing Length:
15 ft [ 4.572 m]
Air Compressor
