Instructions APD 41391
api-usa.com
1220 American Way Libertyville, IL 60048
Phone: 800-942-0315 Fax: 800-949-7502
AABSOLUTEBSOLUTE PPROCESSROCESS IINSTRUMENTSNSTRUMENTS
Precautions
WARNING! All wiring must be performed by a qualified electrician or
instrumentation engineer. See diagram for terminal designations and
wiring examples. Consult factory for assistance.
WARNING! Avoid shock hazards! Turn signal input, output, and
power off before connecting or disconnecting wiring, or removing
or installing module.
Précautions
ATTENTION! Tout le câblage doit être effectué par un électricien
ou ingénieur en instrumentation qualifié. Voir le diagramme pour
désignations des bornes et des exemples de câblage. Consulter
l'usine pour assistance.
ATTENTION! Éviter les risques de choc! Fermez le signal d'entrée,
le signal de sortie et l'alimentation électrique avant de connecter ou
de déconnecter le câblage, ou de retirer ou d'installer le module.
Electrical Connections
This module is factory configured. See the model/serial number
label for T/C type, output types, ranges, and options.
*Do not make any connections to unused terminals or use them
as wiring junctions for external devices. This may cause permanent
damage to the module!
See wiring diagram at right. The T/C input must match the type
indicated on the model/serial number label. Use thermocouple
extension wire that matches your T/C type as needed.
Channel 1 output and range are indicated on the model/serial num-
ber label. A milliamp output may be wired for sinking or sourcing.
Sourcing provides 20 VDC power to your device.
Channel 2 T/C output must use matching thermocouple extension
wire. This output is generally connected to a temperature measure-
ment device. Note that red is negative for most thermocouples.
Module Power
See model/serial number label to make sure available power
matches module operating voltage. The power supply is fuse
protected and the unit may be returned to us for fuse replacement.
For DC power, either polarity is acceptable, but for consistency,
wire positive (+) to terminal 25 and negative (–) to terminal 28.
Calibration
Input and output ranges are factory pre-configured (at 24°C ±1°C).
Zero and Span potentiometers can be used to calibrate each output
channel as required.
1. It will be necessary to simulate or create a low and a high tem-
perature input to the module and use an accurate measurement
device to calibrate each output.
2. Apply power to the module. Allow 20 minutes for warm up time and
ensure the module is at a stable temperature during calibration.
3. Set the input to your minimum value for the Zero calibration.
4. Using an accurate measurement device for each output, adjust
the Zero potentiometers for the exact minimum output readings
desired. For example with a Ch. 1 DC output: 4 mA for a 4-20
mA output or –10 V for a ±10 V output. The Zero controls should
only be adjusted when the input signal is at its minimum.
5. Next, set the input at maximum, then adjust the Span pots for
the exact maximum output readings desired. For example with
a Ch. 1 DC output: 20 mA for a 4-20 mA output. The Span
controls should only be adjusted when the input signal is at its
maximum.
6. Repeat adjustments for maximum accuracy. You may also be
able to fine-tune the outputs by adjusting the calibration of the
devices you have connected to the module outputs.
Optional Alarm Relay
See model/serial number label for the factory configured relay
option codes, if equipped. A red/green bi-color LED is provided to
indication alarm state. It will be green during a non-alarm condition
and red during an alarm condition.
High Alarm (H): The alarm relay changes state when the temperature
exceeds the trip point. The relay resets when the temperature drops below
the reset point. For a high alarm, the trip point is above the reset point.
Low Alarm (L): The alarm relay changes state when the temperature goes
below the trip point. The relay resets when the temperature exceeds the
reset point. For a low alarm the trip point is below the reset point.
HT: Latching alarm with push button reset.
HP: Latching alarm with power-off reset. Module power must be
turned off to reset alarm.
RA: Reverse-acting alarm. Relay coils energized in an alarm condi-
tion. No alarm condition with module power off.
Relay Terminals
See diagram for alarm contact wiring. The module does not provide
power to the relay contacts. Use an appropriate RC snubber for
inductive loads (motors, solenoids, contactors, etc.) to ensure good
relay contact life.
The dual DPST contact sets are in a Form A (NO) and a Form B (NC)
configuration and operate in unison with a single setpoint. They
may be field wired for Form C operation as required.
Set Point Adjustment
This multi-turn potentiometer allows adjustment of the alarm trip
point. This control is adjustable from 0 to 100% of the input range.
Reset Point Adjustment
This multi-turn potentiometer allows adjustment of the alarm reset
point. This control is adjustable from 0 to 100% of the input range.
Sufficient deadband (difference between trip and reset point) should
be used to prevent chattering of the relays or false trips when the
process signal is unstable or changes rapidly.
Alarm Adjustments
Set the input signal to a level that represents the desired set point.
Adjust the Set Point potentiometer to the point at which the relay
changes state from a non-alarm to an alarm condition.
Set the input signal to a level that represents the desired reset point.
Adjust the Reset Point potentiometer to the point at which the relay
changes state from an alarm to an non-alarm condition.
Operate the signal source through the set and reset points to con-
firm desired operation and adjust if necessary.
Relay Test Function
This can be used as a diagnostic aid during initial start-up or
troubleshooting, or as a manual over-ride function. When the front
Relay Test button is depressed or terminals 11 and 12 closed, it
will drive the relay and the bi-color alarm LED to their opposite
states. When released, the relay and LED will return to their prior
states. The Relay Test button also resets the relay on models with
the HT option.
Output Test 1
This can be used as a diagnostic aid during initial start-up or
troubleshooting, or as a manual over-ride function. When the Test
1 button is depressed or terminals 9 & 12 are closed, it will drive
the channel 1 DC output to 75% of span or a customer-specified
value set at the factory. When released or the contact opened, the
channel 1 output will return to its normal level.
Operation
The APD 41391 accepts a thermocouple input and provides a DC
output and a T/C output that are linearized to T/C input temperature.
The green LoopTracker®LED varies in intensity as the input is
sensed by the module. The red LoopTracker LED varies in intensity
with changes in the DC output signal. If either LED fails to illumi-
nate, or fails to change in intensity as the process changes, check
the module power or signal wiring. Note that it may be difficult to
see the LEDs under bright lighting conditions.
Yellow LED Functions
The yellow status LED provides a visual indication of operational modes.
Normal operation: Off
Output Push-to-Test: On for Test 1
Operational error: Blinking 2 digit code
If an error occurs during operation, the yellow Status LED blinks an
error code. Check sensor, wiring, or consult factory.
1 1 Analog-digital converter out-of-range
1 2 Sensor under range
1 3 Sensor over range
1 4 CJC sensor abnormal range
1 5 CJC failure
1 6 Hard ADC out-of-range
1 7 Sensor hard fault, open circuit,
hard ADC fault, or hard CJC fault
Not used
API maintains a constant effort to upgrade and improve its products.
Specifications are subject to change without notice. See api-usa.com for
latest product information. Consult factory for your specific requirements.
WARNING: This product can expose you to chemicals includ-
ing nickel, which are known to the State of California to cause
cancer or birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
* Do not make
connections to
unused terminals!
Mounting to a DIN Rail
Install module vertically on a 35 mm DIN rail in a protective enclo-
sure away from heat sources. Do not block air flow. Allow 1" (25
mm) above and below housing vents for air circulation.
1. Tilt front of module down and position 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, out-
puts, 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. Remove module from the DIN rail.
Spring Clips
Upper Mount
To maintain full isolation avoid combining power supplies
in common with inputs, outputs, or unit power.
Cu 60/75°C
conductors
14 AWG
max.
Wire terminal
torque
0.5 to 0.6 Nm
or
4.4 to 5.3 in-lbs
* Do
not make
connections
to unused
terminals!
Input
Optional alarm contacts
21 3 4
Form A
NO
Form B
NC
25 2625 26 27 2828
112 3 42 3 4 56 7 8
17 18 1919 2020
991010 11 1211 12 13 1413 14 15 16
21 22 2323 2424
29 30 31 32
Power
Thermocouple Input
ANSI/ASTM T/Cs use
red for negative
+ –
1817 19 20
Power
AC or
DC –
2625 27 28
Power
AC or
DC +
Earth
Ground
Output 2Output 2
Output 1Output 1
Optional
alarm
contacts
Shown
with
alarm
option
109 11 12
11 Optional relay test/reset
12 Common
9 Output test ch. 1
Customer-supplied external switches
Voltage
Output 1
– +
Voltage
Device 1
65 7 8
– + 20V
mA
Device 1
Ri
65 7 8
Current
Sourcing
Output 1
Current
Sinking
Output 1
– +
mA
Device 1
Ri
Loop
Power
Source 1
6578
+–
+ –
T/C
Meter 2
2221 23 24
T/C output 2
3029 31 32
Not used for this version
1413 15 16
Not used for this version
Output
Loop-
Tracker
LED and
Test but-
ton for
DC output
channel
only
Output 1Output 1
Output test &
optional alarm
test/reset
Not used
Not usedNot used
