aci INTERFACE Series - Led Indications; Manual Override; Warranty; Override Terminals (OV)

Table 1: LED INDICATIONS
GENERAL INFORMATION
The EFP2 converts a oating point signal into a
proportional pneumatic signal ranging from
0-20 psig. The pneumatic output is proportional
to the signal input. The EFP2 has a manual
override switch with terminal strip contacts to
indicate its status and a potentiometer to vary
the pneumatic output. Two LEDs indicate UP or
DOWN excursions, with an additional one for
power indication. The EFP2 oers four jumper
selectable rates of change in the output
pressure. Output pressure ranges are jumper
shunt selectable for 0 to 10, 0 to 15 and 0 to 20
psig, and adjustable in all ranges. A 0-5 VDC
feedback signal, indicating the resultant branch
line pressure, is also provided. This signal varies
linearly with the branch pressure range selected.
It 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.
The EFP2 incorporates two valves (one controls
exhaust) and does not bleed air at set point. 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 EFP2, branch line
pressure remains constant if the branch line does
not leak air. The EFP2FS is a two valve fail safe model.
Its three-way branch exhaust valve allows exhaust of
branch line air on a power failure.
MOUNTING INSTRUCTIONS
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
ngers 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.
WARRANTY
The EFP 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.
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: 1-888-967-5224 | Website: workaci.com
Page 4
Version: 6.0
I0000588
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 theDC
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.
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 Teon sealing tape, and should be tightened just
snug, using a backup wrench to hold the manifold. ADJUSTMENT OF INSTALLED GAUGES. If installation
requires adjustment of the gauge for proper reading of the face, turn the gauge no more than ½ turn in
either direction. O-rings in the bottom of the gauge port will allow this without leakage.
Warranty does not include malfunction due to clogged valve. Main air port is ltered with the supplied 80
– 100 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.
UP LED DOWN LED INDICATION
On
Off
Ramping Up
Off
On
Ramping Down
Fast Blink
Off
Maximum Output
Off
Fast Blink Minimum Output
Slow Blink Slow Blink Output Holding
1. Setting the input timing range: With power removed, place jumpers in the conguration that most
closely matches the timing range from the controller.
2. Setting the output pressure range: Apply power. Choose a pressure range on the EFP2/EFP2FS 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. Adjust the “SPAN” pot until
the desired maximum output is achieved.
4. Setting the oset: Conrm the green “DN” LED is blinking only, this indicates the output is at
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.
LED INDICATIONS
POWER LED: LED lit indicates power is received by the board.
UP and DOWN LED’s: Solid lit LED indicates the EFP2 is receiving an Up or Down command. Single
blinking LED indicates that the EFP is at the minimum or maximum of the timing range selected. Both
LED’s blinking indicates the EFP2/EFP2FS is at set-point.
Connect the normally open (NO) terminals of two separate relays, triac outputs, or the normally open
terminals of a tri-state relay to the “DN” and “UP” inputs. Connect the common terminal of the relay(s) to
terminal SC (signal common) on the EFP2 or EFP2FS. A
signal to both up and down inputs for 3 seconds will
cause branch line pressure to drop to 0 psi (see Table
1).
The branch exhaust response time is determined by
the combined exhaust air ow as well as pressure
dierentials. If power to the EFP2 is lost, it will contin-
ue to hold branch pressure if no branch line leaks. If
power to the EFP2FS is lost, the branch line will bleed
to 0 psi.
Manual override
Move the AUTO/MAN toggle switch to the MAN position. Turn the shaft on the MAN pot to vary 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.
For optimum performance and reduced
noise, the EFP2FS unit requires a branch
air line capacity equal to at least 25 feet of
1/4" O.D. polyethylene tubing to operate
without oscillation, and the EFP2 unit
requires a branch air line capacity equal
to at least 15 feet of 1/4" O.D.
polyethylene tubing to operate without
oscillation.
FIELD CALIBRATION
The default jumper setting from the
factory for the EFP2/EFP2FS is B (15 psi)
for the output range and A0, B0 for the
input timing range. There are four (4)
input timing ranges available per version
and three (3) selectable output pressure
ranges. NOTE: The ZERO potentiometer
is factory calibrated. Do not adjust.