aci DRN3.1 Installation instructions

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 1
Version: 6.0
I0000475
FIGURE 1: DIMENSIONS
INTERFACE SERIES
Installation & Operation Instructions
DRN3.1
Phone: [phone]
Website: workaci.com
.70”
(17.78mm)
3.25” (82.55mm)
4.69”
(119.13mm)
BOARD
SNAP TRACK
GENERAL INFORMATION
The DRN3.1 is an interface device that allows
microprocessor control of a variable resistance. The
DRN3.1’s isolated resistor network can be
controlled by several dierent DDC signal types. It
directly replaces a variable resistance controller and
simulates the action of a slide wire or rotary
potentiometer. All connections of the simulated
potentiometer, the wiper, and both ends of the
resistance range are available on the terminal strip.
The DRN3.1 must be ordered with a Resistance
Network. The DRN3.1 accepts Analog, Pulse, or
Floating Point input signals (including triac) and
converts them into a proportional resistive output.
The output resistance does not wrap around if the
input signal exceeds the highest or lowest selected
input value. Custom resistance ranges are available
upon request. The DRN3.1 has on-board fail-back
relays that lock out the original resistive signal
during operation. However, if the supply power is
lost, control of the circuit will revert back to the
original controller signal. An easy local override can
be made by placing a xed (or variable) resistor
between W and R Fail-safe terminals. Jumper inputs
can be specied to have the factory set them. This
will speed up installation time for the end user.
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
5.00” (127.00mm)
3.22”
(81.91mm)

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 2
Version: 6.0
I0000475
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.
FIGURE 2: WIRING
ACI
1-888-WORK-ACI
DRN3.1
R Value (Min-Max)
*
*
*
HIGHLOW
WIPER
UP DN
I
TVI
V
PD A
T D
15
5
10 0
60 30
POWER
90 1
W B R
FAILSAFE
+ UP+ - COMDN
24V V/I PWM / TRI
W B
OUTPUT
R
S2
S3
S1
S6
S4
S5
+ UP+ - COMDN
24V V/I PWM / TRI
B W
OUTPUT
R
W B
OUTPUT
R
Analog Signal Common
(+)
(-)
24 VAC
Power
Supply
or VDC
Analog Signal Input
PWM Input or Floating Point Up Input
Floating Point Down Input
PWM / Floating Point Signal Common To
Failback
Control
Wiper
Maximum
Minumum
Test Points for
Resistance Card
See Page 4
Wiper
Maximum
Minimum
To
Actuator
* Optional Offset Pots
for Resistive Network
(High, Low & Wiper)
(+)
(-)
24 VAC
Power
Supply
or VDC Pulsed Dry
Contact
Figure #2
Non-Isolated PWM Signal Input
For switching common see wiring
diagram on page 2.
NOTE: Please follow Minimum, Maximum,
and Wiper designators as shown in Diagram for
both OUTPUT and FAILSAFE terminal blocks.
DO NOT refer to Silkscreen designators, W & B.
Older versions of the DRN3.1 have the W and B
silk screened designations swapped from those
shown correctly in the diagram to the left.
Rev 1
Silkscreen
Rev 2
Silkscreen
HW3
*HW3 Pin Towards Top
+ UP+ - COMDN
24V V/I PWM / TRI
GND
24V
AC Power
GND
24V
OPN
CLS
(+)
(-)
24 VAC
Power
Supply
DRN3.1
TRIAC SIGNAL INPUT
(Switching Common)
CALIBRATION
VERSION IDENTIFICATION
Most DRN3.1’s are shipped as version #1. An IC chip on the DRN3.1 is labeled with the version program
number. Make sure you have the correct version. You may have to remove the resistor network card to
view and compare to Table 1 (pg. 3).

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
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Version: 6.0
I0000475
TABLE 1: JUMPER SETTINGS
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
I
TVI
V
PD
A
T
D
15
5
10 0
60
30
90 1
Input
0 - 5 Volts
0 - 10 Volts
0 - 15 Volts
1 - 5 Volts
2 - 10 Volts
3 - 15 Volts
0 - 20 mA
4 - 20 mA
S1 S2 S3 S4 S5 S6
JUMPER SETTINGS - ANALOG
Uses same Version #1 or #2 chips
as Pulse & Floating Point programs
Input
0.1 - 25.5
sec. pulse
0.02 - 5
sec. pulse
0.59 - 2.93
sec. pulse
30 sec.
Floating Pt.
60 sec.
Floating Pt.
90 sec.
Floating Pt.
S1 S2 S3 S4 S5 S6
JUMPER SETTINGS - PULSE & FLOATING POINT
Version #1 - Chip # 0052y0h.hex
Input
0.1 - 10
sec. pulse
0.023 - 6
sec. pulse
45 sec.
Floating Pt.
120 sec.
Floating Pt.
240 sec.
Floating Pt.
S1 S2 S3 S4 S5 S6
JUMPER SETTINGS - PULSE & FLOATING POINT
Version #2 - Chip # 0054y0b.hex
Input
0.1 - 10
sec. pulse
S1 S2 S3 S4 S5 S6
JUMPER SETTINGS - DUTY CYCLE PULSE
Version #4 - Chip # 0305y1a.hex
RESISTOR NETWORK
Each DRN3.1 requires a plug-in resistor network card (RN) to operate properly. This resistance card
determines the simulated slide wire potentiometer values for the output. Insert the RN (usually in a
separate package from DRN3.1) into the DRN3.1. The HW3 pin on the Resistor Network card should be
oriented towards the top as shown on Page 1.There are two rows of pins on the RN and two rows of female
connections on the DRN3.1. The DRN3.1 resistance output simulates a potentiometer. The Terminal Block
located on the far right is the Wiper. TheTerminal Block located in the middle is the Maximum; the high end
of the potentiometer. The Terminal Block located on the far left is the Minimum; the low end of the
potentiometer. Upon power-up, the wiper will start at the Minimum position and will remain there until
the rst PULSE or FLOATING POINT signal is received. The ANALOG version will begin tracking the input
signal instantly after “sampling” the input signal to eliminate error. The output resistance will not change
on the PULSE version until the end of the pulse. To check the resistance output, vary the input signal and
measure the resistance. The resistance between terminals Wiper and Minimum will increase as the input
signal increases and the resistance between Wiper and Maximum will decrease. If both oating point
inputs are on for 3 seconds, the DRN3.1 resets to minimum resistance output.

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
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Version: 6.0
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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 oating 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, conrm power
light is on and measure voltage to conrm 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 xed 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, conrm 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 oat.
Current input
Conrm 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 nd 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

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
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Pulse Width Modulated (or PWM) input (Continued)
the COM terminal. Reference Figure #2. Count to 50% of timing range and remove. Verify the pulse UP LED
indication. Voltage can be measured across the input to verify proper voltages. Read the output. Has the
output changed? The output should be close to 50% of set output. If no, contact ACI Technical Support. If
yes, unit is functioning properly.
FLOATING POINT / TRI-STATE
Apply 24 VAC/VDC to the PWR terminals. Connect your meter to the Wiper and Minimum 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 a jumper wire to the 24V“-“ only (this is your
jumper wire #2). You are now ready to simulate a timed Up signal. For testing purposes, select the 30 or 45
second range 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 the Com terminal. Count to 50% of timing range
and remove. Verify the pulse UP LED indication. Voltage can be measured across the input to verify proper
voltages. Read the output. Has the output changed? The output should be close to 50% of the set output.
Moving jumper wire #1 from UP to DOWN, and repeating the same test, should decrease the output signal.
If no, contact ACI Technical Support. If yes, unit is functioning properly.
TESTING THE OUTPUT
Measured resistance from Wiper to Minimum terminal blocks will begin at the minimum signal, as
specied by your resistor network, and will increase proportionally to the commanded input value. To
reverse the output signal, measure resistance from Wiper to Maximum terminal blocks. This will begin at
the maximum signal, as specied by your resistor network, and will decrease proportionally to the
commanded input value. A clicking sound will occur when resistance is changed. Resistance changes in
steps and is divided into 256 equal steps. Exception is version 3 where step size is selected.
Command a change or simulate an input signal to change the output. Measure the resistance value. If the
resistance has not changed, check settings and reset power.
Verify the input is functional.
If yes, then contact ACI Technical Support.
MOST COMMON PROBLEM
The analog input from the controller can contain electrical noise. This noise is seen by the DRN3.1 as a
change in commanded input signal and quickly changes the output. The most common symptom is a
constant chatter of the relays. Standard precautions should be taken to prevent noise on the signal input
of the DRN3.1 (i.e.: Do not run signal wiring near line voltage wiring or orescent light xtures). Versions 1
and 2 of the DRN3.1 were modied in 2001 to add extra ltering to the input. Time response full scale is
about 6 seconds. Check version number on your DRN3.1. If high speed response or extra ltered versions
is required contact ACI Sales Department.
TEST POINTS FOR RESISTOR NETWORK (RN) CARD
The Resistor Network card does not have to be attached to the DRN3.1 motherboard for this test, but if
attached to the DRN3.1, you must remove power before testing. Using an OHM meter, test the last resistor
as illustrated on page 1. The value indicated should be ½ the total resistance range of the Resistor Network
card.
Example: A 500 Ohm reading indicates a 0 to 1000 Ohm Resistor Network card.
A 750 Ohm reading indicates a 0 to 1500 Ohm Resistor Network card.

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
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Version: 6.0
I0000475
WARRANTY
The DRN 3.1 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.
PRODUCT SPECIFICATIONS
24 VAC +/- 10%, 24 VDC +25% / -8%
250 mA maximum
0 to 5 VDC, 1 to 5 VDC, 0 to 10 VDC, 2 to 10 VDC, 0 to 15 VDC, 3 to 15 VDC @
10,000
0-20 mA, 4 to 20 mA @ 250
Relay Contact Closure, Transistor, Triac
7-30 VDC, 10-26.4 VAC @ 750
Version 1: 0.02-5.0 (0.02s) | 0.1-25.5 (0.1s) | 0.59-2.93 (0.01s*)
Version 2: 0.1 to 10.0s or 0.023 to 6.0s*
Version 1: 30, 60, 90s
Version 2: 45, 120, 240s
5-24 VDC/VAC
750 nominal
See Resistance Network Ordering Grid
Form “C” Relays
256 Steps (No wrap around)
2A @ 24 VDC, 0.5A @ 240 VAC
45° Captive screw Terminal Blocks
12 (3.31 mm) to 22 AWG (0.33 mm)
0.5 Nm (Minimum); 0.6 Nm (Maximum)
35 to 120°F (1.7 to 48.9°C)
10 to 95% non-condensing
-20 to 150°F (-28.9 to 65.5°C)
RoHS2, WEEE
NON-SPECIFIC INFORMATION
Supply Voltage:
Supply Current:
Input Voltage Signal Range (@
Impedance):
Input Current Signal Range (@
Impedance):
Input Pulse Signal Source:
Input Pulse Signal Level (@
Impedance):
Pulse Ranges:
Floating Point / Tri-State Input
Rates of Change:
Floating Point / Tri-State Input
Signal Trigger Level:
Floating Point / Tri-State
Impedance:
Resistance Output:
Digital Output Type:
Output Resolution:
Relay Contact Rating:
Connections:
Wire Size:
Terminal Block Torque Rating:
Operating Temperature Range:
Operating Humidity Range:
Storage Temperature:
Agency Approvals:

NOTES
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 7
Version: 6.0
I0000475

Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone: [phone] | Website: workaci.com
Page 8
Version: 6.0
I0000475
Automation Components, Inc.
2305 Pleasant View Road
Middleton, WI 53562
Phone: [phone]
Website: workaci.com