Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone:
1-888-967-5224 |
Website:
workaci.com
Page 4
Version: 6.0
I0000475
SETTING THE JUMPERS
Remove power from the DRN3.1. Place jumpers S1 through S6 in the appropriate positions. All six
jumpers must be in proper position for each input type. Hold the DRN3.1 vertical with the label at top
right to orient its jumper shunts with the chart. Version #1 and Version #2 share the same analog inputs.
Ramping time for floating point inputs are selectable.
SETTING THE JUMPERS
(Continued)
Version #4 accepts a continuous pulse signal command string within a 10 second window. No pulse in this
10 second window produces minimum percent output. A ten second pulse in this 10 second window
produces 100% output. Continuous pulse will produce maximum percent output.
When power is restored, changes will be recognized. Apply 24 VAC/VDC to “PWR” terminal, confirm power
light is on and measure voltage to confirm proper voltage.
When power is applied to terminals “+24V” and “-“, the POWER LED will light and the Fail Safe terminals will
be disconnected from the output terminals. Fail-back only occurs when the DRN3.1 has lost power. When
the DRN3.1 is not powered on terminals “24V” and “-“, the Fail Safe terminals are connected to the Output
terminals. Check for continuity.
The DRN3.1 will automatically fail-back to 0 Ohms. For a fail-back to some other resistance, a manual
potentiometer or fixed resistor can be added between Minimum and Wiper only, if outputting a normal
acting signal. If outputting a reverse acting signal, please contact ACI for assistance.
TESTING THE INPUT
Voltage input
Connect the “+” or positive wire to “V/I+”. Connect the common to “24V-“. Apply a voltage from control
source. Measure voltage at “24V-“ and “V/I+” at terminal block. If the commanded voltage is not present,
remove the “+” or positive wire and measure from “+” wire to “24V-“. If no voltage is measured check the
wiring from controller. If voltage disappears or is reduced when connected to the DRN3.1, confirm input
jumper is set to voltage mode and remove signal input wires and power from unit. Measure the resistance
from “24V-“ to “V/I+”. Resistance in the voltage modes will be around 10K. If input is shorted, contact ACI
Technical Support. If not shorted, remove the controller input common and connect 24 VDC/VAC to the
DRN3.1. Check for ground loop: Place meter in voltage mode and measure VAC and VDC from analog
input common wire to power supply common. If any voltage is measured in DC or AC a ground loop most
likely exists. Check power commons and / or ground potentials. Use a separate 24 volt transformer for the
DRN3.1 and let common float.
Current input
Confirm the input jumper is in the correct position. Measured input resistance should be around 250
Ohms. Connect “+” or positive to “V/I+” and common or “-“ to “24V-“. Apply mA signal. Place meter in
voltage and measure voltage across “V/I+” and “24V-“ 4 mA is equal to 1 volt and 20 mA is equal to 5 volts.
Use Ohms Law to find voltage from current. (Current x 250 = Volts. Example: 12 mA or 0.012 x 250 = 3
volts). If no voltage is present, check wiring for open. Current cannot exist without voltage present from
“V/I+” to “24V-“ unless dead shorted.
Pulse Width Modulated (or PWM) input
Apply 24 VAC/VDC to the PWR terminals. Connect your meter to the Wiper and Maximum terminals on the
output terminal block. Set meter to resistance range of resistor network. Connect a jumper wire from UP
to the 24V “+” terminal (this is your jumper wire #1). Connect another jumper wire into the 24V “-“ terminal
only (this is your jumper wire #2). You are now ready to simulate a timed pulse signal. For testing
purposes, select 0.1 to 25.5 or 0.1 to 10 seconds on version 2. Be sure to reset power to allow the DRN3.1
to recognize new settings. Take the free end of jumper wire #2 and connect by holding wire to
