aci INTERFACE Series Installation & Operation Instructions

INTERFACE SERIES
Installation & Operation Instructions
PTA2

GENERAL INFORMATION

The PTA2 accepts a timed contact, or solid state
closure, from a microprocessor controller and
converts it to a linear analog output with 255
steps of resolution. The PTA2 will not wrap
around if an excessively long pulse is received.
Seven input pulse rates are jumper selectable
(between Version 1 and 2). The input signal is
optically isolated and can accept either positive
or negative polarity. The PTA2 includes triac
adapter circuitry (jumper selectable) for a triac
input. The PTA2 has a jumper selectable manual
override which will allow modulation of the
output between 0-10 VDC to verify proper
operation of the controlled device. On Version 1,
the last output signal is held until the PTA2
receives the end of the next pulsed input signal.

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.

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
FIGURE 1: DIMENSIONS
2.35" (59.69mm)
2.20"
(55.88mm)
2.70"(68.58mm)
2.18"
(55.37mm)
Page 1
Phone: 1-888-967-5224
Website: workaci.com
0.70"
(17.78mm)
Version: 5.0
I0000616