Absolute Process Instruments DuoPak APD 2000 Manual - Page 2
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Instructions
Electrical Connections
WARNING! All wiring must be performed by a qualified electri-
cian or instrumentation engineer. Consult factory for assistance.
Avoid shock hazards! Turn signal input, output, and power off
before connecting or disconnecting wiring.
Polarity must be observed for signal wiring connections. If the
input and/or output do not function, check wiring and polarity.
Each product is factory configured to your exact input and
output ranges as indicated on the white serial number label.
Check label for module operating voltage to make sure it
matches available power. The power supplies are fuse protect-
ed and the unit may be returned to API for fuse replacement.
Outputs
For milliamp ranges determine if your devices provide power
to the current loop or if the loop must be powered by the APD
module. Typical voltage may be 9-24 VDC at your device's
terminals if it provides power to the loop.
Device for Output Channel 1
Measuring/recording device accepts a
voltage input.
Measuring/recording
device
has
an unpowered or passive mA input.
APD module provides the loop power.
Measuring/recording device has a mA
input and powers the current loop.
Device for Output Channel 2
Measuring/recording device accepts a
voltage input.
Measuring/recording
device
has
an unpowered or passive mA input.
APD module provides the loop power.
Measuring/recording device has a mA
input and powers the current loop.
Inputs, DC
For milliamp ranges determine if your devices provide power
to the current loop or if the loop must be powered by the APD
module. Typical voltage may be 9-24 VDC at your device's
terminals if it provides power to the loop.
DC Input Channel 1
Sensor or transmitter with a voltage
output.
Transmitter with a mA output that pow-
ers the current loop. Typically a 3 or
4-wire device.
Transmitter with an unpowered mA
output. Typically a 2-wire device. APD
module provides loop power.
DC Input Channel 2
Sensor or transmitter with a voltage
output.
Transmitter with a mA output that pow-
ers the current loop. Typically a 3 or
4-wire device.
Transmitter with an unpowered mA
output. Typically a 2-wire device. APD
module provides loop power.
Module Power Terminals
Check white model/serial number label for module operating
voltage to make sure it matches available power.
When using DC power, either polarity is acceptable, but for
consistency, wire positive (+) to terminal 25 and negative (–)
to terminal 28.
API maintains a constant effort to upgrade and improve its prod-
ucts. Specifications are subject to change without notice. Consult
factory for your specific requirements.
BSOLUTE
Mounting
The housing clips to a standard 35 mm DIN rail. The housing is
IP40 rated and should be mounted inside a panel or enclosure.
1. Tilt front of module down and posi-
tion the lower spring clips against
the bottom edge of DIN rail.
2. Push front of module upward until
upper mount snaps into place.
Removal
Avoid shock hazards! Turn signal
input, output, and power off.
1. Push up on bottom back of module.
2. Tilt front of module downward
to release upper mount from top
edge of DIN rail.
3. The module can now be removed
from the DIN rail.
Terminal Terminal
Calibration
Front-mounted Zero and Span potentiometers for each channel
3 (–)
4
(+)
can be used to compensate for load and lead variations.
1. Apply power to the module and allow a minimum 30 minute
3 (–)
4
(+20 V)
warm up time.
2. Using an accurate calibration source, provide an input to
2 (–)
3
(+)
the module equal to the minimum input required for the
application.
Terminal Terminal
3. Using an accurate measurement device for the output,
7 (–)
8
(+)
adjust the Zero potentiometer for the exact minimum output
desired. The Zero control should only be adjusted when the
input signal is at its minimum. This will produce the cor-
7 (–)
8
(+20 V)
responding minimum output signal. Example: for 4-20 mA
output, the Zero control will provide adjustment for the 4 mA
6 (–)
7
(+)
or low end of the signal.
4. Set the input at maximum, and then adjust the Span pot for
the exact maximum output desired. The Span control should
only be adjusted when the input signal is at its maximum.
This will produce the corresponding maximum output
signal. Example: for 4-20 mA output, the Span control will
provide adjustment for the 20 mA or high end of the signal.
5. Repeat adjustments for both output channels for maximum
Terminal Terminal
accuracy.
17 (–)
19
(+)
Output Test Function
When the Test button is depressed it will drive the output with a
known good signal that can be used as a diagnostic aid during
17 (–)
19
(+)
initial start-up or troubleshooting. When released, the output
will return to normal.
19 (–) 18
(+15 V)
Each Test Cal. potentiometer is factory set to approximately
50% output. Each can be adjusted to set the test output from
Terminal Terminal
0 to 100% of the output span. Press and hold the Test button
and adjust the corresponding Test Cal. potentiometer for the
21 (–)
23
(+)
desired output level.
They may optionally be externally wired for remote test opera-
21 (–)
23
(+)
tion or a manual override. See wiring diagram at right.
Operation
The APD 2000 accepts two independent DC voltage or current
23 (–) 22
(+15 V)
inputs and provides two independent and optically isolated DC
voltage or current outputs that are linearly related to each input.
Green LoopTracker
each signal is being sensed by the input circuitry of the module.
They also indicates the input signal strength by changing in
intensity as the process changes from minimum to maximum.
If an LED fails to illuminate, or fails to change in intensity as
the process changes, check the module power or signal input
wiring. Note that it may be difficult to see the LEDs under bright
lighting conditions.
Two red LoopTracker output LEDs provide a visual indication
that the output signals are functioning. They become brighter
as the input and each corresponding output change from
minimum to maximum.
For a current output the red LED will only light if the output loop
current path is complete. For either current or voltage outputs,
failure to illuminate or a failure to change in intensity as the
process changes may indicate a problem with the module
power or signal output wiring.
ROCESS NSTRUMENTS, Inc.
Upper Mount
Spring Clips
®
input LEDs provide a visual indication that
1220 American Way Libertyville, IL 60048
800-942-0315
Phone:
APD 2000
Voltage
Device 1
–
+
Voltage
Output
1
2
3
4
Ch. 1
mA
Device 1
R
i
+
–
Loop
Loop
Power
Power
Source 1
Source 2
–
+
Current
Sinking
1
2
3
4
Output
Ch. 1
mA
Device 1
R
i
–
+ 20V
Current
Sourcing
Output
1
2
3
4
Ch. 1
External
Contacts
for Test
Function
9
10
11 12
Channel 1
Output
Loop
Test Cal.
Tracker
Test
Span
Input
Loop
Zero
Tracker
APD 2000
Channel 1
DC to DC
Isolated Transmitter
17
18
19
20
+15V
–
R
i
mA
Xmtr 1
Ch. 1
Current Sourcing Input
Current Sourcing Input
17
18
19
20
+
–
Loop
Power
Source 1
Source 2
+
–
R
i
mA
Xmtr 1
Ch. 1
Current Sinking Input
Current Sinking Input
17
18
19
20
–
+
Voltage
Xmtr 1
Ch. 1
Voltage Input
25
26
27
28
28 Power AC or DC –
26 Earth Ground
25 Power AC or DC +
To maintain full isolation avoid combining power supplies in
common with inputs, outputs, or unit power.
api-usa.com
Fax: 800-949-7502
Voltage
Device 2
–
+
5
6
7
8
Ch. 2
mA
Device 2
R
i
+
–
–
+
5
6
7
8
Ch. 2
mA
Device 2
R
i
–
+ 20V
5
6
7
8
Ch. 2
13
14
15 16
®
Channel 2
Output
Loop
Test Cal.
Tracker
Test
Span
Input
Loop
Zero
Tracker
Channel 2
DC to DC
Isolated Transmitter
21
22
23
24
+15V
–
R
i
mA
Xmtr 2
Ch. 2
21
22
23
24
+
–
Loop
Power
+
–
R
i
mA
Xmtr 2
Ch. 2
21
22
23
24
–
+
Voltage
Xmtr 2
Ch. 2
Voltage Input