Absolute Process Instruments DuoPak APD 2017 Handmatig - Pagina 2
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Instructions
Electrical Connections
WARNING! All wiring must be performed by a qualified electrician 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 protected 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.
Input 1, Temperature
The sensor type and temperature range are factory configured. See
the model/serial number label for sensor type and range.
Temperature Input Ch. 1
Term.
17
Two wire RTD or thermistor
Signal –
17
Three wire RTD
Signal –
Input 2, Frequency
The input range is pre-configured at the factory. No input calibration
is necessary. The frequency input is compatible with most types of
sensors that product a minimum 100 mV amplitude change and a
minimum 5 microsecond pulse width. A 15 VDC supply is available
to power the sensor if required. Always refer to the sensor manu-
facturer's data sheet to determine supply voltage compatibility and
proper wiring.
Signal
Frequency Sensor Ch. 2
Com.
2 wire or Namur
n/a
22
requiring external power
21 (–)
2 wire self generating (VR)
21 (–)
3 wire PNP or NPN
22
Sensor Load
The frequency signal input is capacitively coupled to prevent any DC
in the input. Some sensors, typically those without an internal load
resistor, require a resistive load in order to function.
The resistor value may be specified by the sensor manufacturer
as the "minimum resistive load" or calculated from the sensor
manufacturer's specified "load current range".
The 15 VDC power supply is capable of providing 25 mA. A load
current range of 3 mA to 25 mA would typically use a 5 kΩ to 500
Ω resistor.
Module Power Terminals
Check white model/serial number label for module operating volt-
age 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 can
3 (–)
4
(+)
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 the
2 (–)
3
(+)
module equal to the minimum input required for the application.
3. Using an accurate measurement device for the output, adjust
Terminal Terminal
the Zero potentiometer for the exact minimum output desired.
7 (–)
8
(+)
The Zero control should only be adjusted when the input signal
is at its minimum. This will produce the corresponding minimum
output signal. Example: for 4-20 mA output, the Zero control will
7 (–)
8
(+20 V)
provide adjustment for the 4 mA or low end of the signal.
4. Set the input at maximum, and then adjust the Span pot for the
6 (–)
7
(+)
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
Term.
Term.
accuracy.
Jumper
19
Ch. 2 Sensitivity Adjustment
18 & 19
Signal
+
This multi-turn potentiometer provides an adjustable threshold
18
19
level that the incoming signal must overcome before an output can
Exc.
Signal
+
be produced. This is used to limit noise and minimize false input
signals that may cause erroneous readings.
Fully clockwise: (max. sensitivity), input threshold is ±25 mV.
Fully counterclockwise: (min. sensitivity), input threshold is ±2.5 volts.
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
initial start-up or troubleshooting. When released, the output will
return to normal.
Sensor
Signal
Each Test Cal. potentiometer is factory set to approximately 50%
Power
Input
output. Each can be adjusted to set the test output from 0 to 100%
(+15 V)
23
(+)
of the output span. Press and hold the Test button and adjust the
corresponding Test Cal. potentiometer for the desired output level.
23
(+)
n/a
They may optionally be externally wired for remote test operation or
(+15 V)
23
(+)
a manual override. See wiring diagram at right.
Operation
The APD 2017 accepts one RTD or thermistor input and one
frequency input and provides two optically isolated DC voltage or
current outputs that are linearly related to the inputs.
Green LoopTracker
each signal is being sensed by the input circuitry of the module.
They also indicates the input signal strength by changing in inten-
sity 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 2017
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
Sensitivity
Output
Loop
Test Cal.
Tracker
Test
Span
Input
Loop
Zero
Tracker
APD 2017
Channel 1
RTD to DC
Isolated Transmitter
17
18
19
20
2 wire using 15 V supply
Ch. 1
3-Wire Input
bleed resistor is required
17
18
19
20
2 wire self-generating
Ch. 1
2-Wire Input
Jumper 18 & 19
See sensor specs. if load
To maintain
–
full isolation
avoid com-
bining power
supplies in
common with
inputs, out-
puts, or unit
power.
load resistor is required
25
26
27
28
28 Power AC or DC –
26 Earth Ground
25 Power AC or DC +
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
Frequency to DC
Isolated Transmitter
21
22
23
24
–
+Sig
2 Wire
15 kΩ typ.
See sensor specs. if
21
22
23
24
+Sig
–
2 Wire
21
22
23
24
+Sig
–
Load resis.
NPN
3 wire NPN
resistor is required
21
22
23
24
+Sig
PNP
Load resis.
3 wire PNP
See sensor specs. if