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Installation and Operation Instructions
ATL
Analog Current / Voltage Input to Four Adjustable Trip Level Relay Outputs
Relay Output Terminals
(max load 2 amps Q 24V)
Status LED's light when
relays are energized
PWR LED lights when power is
applied to (+) and (-) terminals
Adjust potentiometers
to set on/off of relays
(see "Calibration and Checkout")
Shunt on both pins for 24 VDC
On one pin only for 24 VAC
(+)
SEE
NOTE
#1
(+)
Analog Input Signal
(-)
Input legend for P6
P6 jumper shunt
selects input span
(-)
INSTALLATION
READ THESE INSTRUCTIONS BEFORE YOU BEGIN INSTALLATION.
Ground yourself before touching the 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. SEE JUMPER SHUNT
ABOVE INPUT TERMINAL BLOCK TO SELECT THE POWER TYPE YOU ARE USING.
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, 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.
AUTOMATION COMPONENTS, INC
2305 Pleasant View Road
Middleton, Wisconsin 53562 (888) 967-5224
www.workaci.com
Page 1 of 2
Version : 2.0
I0000473
If the 24 VAC power is shared 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 deenergizing that can cause malfunction or destruction of electronic circuits. Refer to wiring diagram
for connection information.
3.
You should measure the actual voltage output of the secondary. If the output is not fully loaded you
may read a higher voltage than the circuit board can handle.
CALIBRATION AND CHECKOUT
Place the jumper shunts as shown in diagrams printed on ATL (between input power/signal terminals and
label space) for the input signal span selected. Connect input signal to IN and (-). Also place jumper shunt
above power terminal block for 24 VAC or 24 VDC power (see drawing, page 1).
Turn all trim pots clockwise (minimum value) for making relay. You will hear a slight “clicking” when you
reach the end of the adjustment, before calibrating.
Apply power to terminals “+” and “-“. The “POWER” LED should light. If you are working in the 0-12 VDC
signal input range and no signal is connected, all relays will go high (or energize).
Adjust each trim pot as follows: Input the desired signal level and adjust the respective pot counterclockwise
until the corresponding relay turns on. LED 1, 2, 3 or 4 will turn on when the respective relay is energized.
Turning the potentiometer counterclockwise increases the voltage or current level at which the relay
energizes.
Pot 1 sets the point at which relay 1 turns on
Pot 2 sets the point at which relay 2 turns on
Pot 3 sets the point at which relay 3 turns on
Pot 4 sets the point at which relay 4 turns on
Note: To cascade several ATL’s together, connect power, signal and common in parallel. If using current
input, select current on one board only and set other ATL(s) to the 0-12 VDC span.
EU Commission Directive 2002/95/EC (RoHS) Compliant
Power Consumption: 180 mA Maximum
Contact Ratings: 2 Amps @ 24V
Input Impedance:
Standard Dead Band 3%:
0-12 VDC – 0.3 volts
0-24 VDC – 0.6 volts
0-24 mA – 0.6 mA
(10% and 1% dead bands also available)
0-12 VDC / 10M Ohms
0-24 VDC / 20K Ohms
0-20 mA / 500 Ohms
AUTOMATION COMPONENTS, INC
2305 Pleasant View Road
Middleton, Wisconsin 53562 (888) 967-5224
www.workaci.com
Page 2 of 2
Version : 2.0
I0000473
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