Page 1
Safety Information
CAUTION: Install an appropriately sized RC lter across contactor
coils, relays and other inductive loads.
NOTE! Provide a local disconnect to isolate the power controller for
servicing.
NOTE! The nominal current is specied for ambient temperatures
at or below 40° C. Ensure the application design allows for adequate
cooling of each power controller. The power controller must be mount-
ed vertically. The cooling design must prevent air heated by one power
controller from causing power controllers mounted above to exceed the
ambient operating temperature limit.
AVERTISSEMENT! Pour éviter d’endommager la propriété et l’équi-
pement, les blessures et la perte de vie, respecter les codes électriques
en vigueur et les pratiques de câblage standard au moment de l’instal-
lation et de l’utilisation de ce produit. Dans le cas contraire, cela peut
entraîner la mort, des blessures graves ou des dommages.
AVERTISSEMENT! Lorsqu’il est utilisé, le contrôleur de puissance
est connecté à des tensions dangereuses. Ne réparez pas le contrôleur
sans d’abord déconnecter et empêcher le rétablissement de l’alimenta-
tion lors de l’entretien du contrôleur de puissance.
AVERTISSEMENT! Tous les services, y compris l’inspection,
l’installation, le câblage, l’entretien, le dépannage, le remplacement de
fusibles ou d’autres composants pouvant être réparés par l’utilisateur,
doivent être effectués uniquement par un personnel dûment qualié. Le
personnel de service doit lire ce manuel avant d’effectuer tout travail.
Pendant que l’entretien est exécuté, tout personnel non qualié ne doit
effectuer de travail sur l’appareil ni se trouver à proximité.
AVERTISSEMENT! Ne pas utiliser pour les applications aérospatia-
les ou nucléaires.
AVERTISSEMENT! L’indice de protection du régulateur de puis-
sance est de IP20 lorsque les couvercles sont installés et fermés. L’ap-
pareil doit être installé dans une enceinte qui assure toute la protection
supplémentaire nécessaire pour l’environnement et l’application.
AVERTISSEMENT! Mise à la terre du régulateur de puissance par
le biais de la borne de prise de terre de protection fournie. Vérier que la
prise de terre est conforme aux spécications de l’impédance UL 508A
0.1 ohm. Cela doit être vérié périodiquement.
AVERTISSEMENT! L’installation doit être protégée par des dis-
joncteurs électromagnétiques ou des fusibles.
AVERTISSEMENT! Au moment de relever des mesures de tension
ou de courant en direct, utiliser un équipement de protection individuelle
approprié pour les tensions et les potentiels d’arc électrique concernés.
AVERTISSEMENT! Vérier que les valeurs de tension et de courant
du régulateur de puissance sont correctes pour l’application.
ATTENTION: Pour éviter de compromettre l’isolation, ne pas plier le
l ou tout autre composant au-delà de ses spécications en matière de
rayon de courbure.
ATTENTION: Protéger le régulateur de puissance contre les
températures élevées, l’humidité et les vibrations.
ATTENTION: Installer un ltre RC de dimensions appropriées sur
les bobines du contacteur, les relais et autres charges par induction.
REMARQUE: Fournir une déconnexion locale an d’isoler le régula-
teur de puissance pour l’entretien.
REMARQUE: Le courant nominal est précisé pour des températures
ambiantes égales ou inférieures à 40 °C. S’assurer que la conception de
l’application permette le refroidissement adéquat de chaque régulateur
de puissance. Le régulateur de puissance doit être monté verticale-
ment. La conception de refroidissement doit empêcher l’air chauffé
par le régulateur de puissance de dépasser la limite de température
de fonctionnement ambiante de la part des régulateurs de puissance
montés au-dessus.
REMARQUE: N’utiliser que des câbles et des ls en cuivre pour
l’utilisation à 90 °C ou plus, sauf indication contraire.
For assistance contact Watlow: www.watlow.com
1-800-WATLOW2 (1-800-928-5692)
wintechsupport@watlow.com
Technical Assistance
If you encounter a problem with your Watlow® controller, review your con-
guration information to verify that your selections are consistent with your
application: inputs, outputs, alarms, limits, etc.
If the problem persists, you can get technical assistance by e-mailing your
questions to wintechsupportwatlow.com or by dialing +1 (507) 494-5656 be-
tween 7 a.m. and 5 p.m. Central Time USA & Canada. Ask for an Applications
Engineer. Please have the complete model number available when calling.
Warranty
The ASPYRE AT power controller is warranted by Watlow in accordance with
the terms and conditions set forth on Watlow’s website at www.watlow.com/
terms.
Registered Trademarks
Watlow®, ASPYRE® and COMPOSER® are registered trademarks of Watlow
Electric Manufacturing Company.
UL® is a registered trademark of Underwriter’s Laboratories, Inc.
Modbus® is a registered trademark of Schneider Automation Incorporated.
Document Number: 10-51914, Rev. -, August 2022
For assistance contact Watlow: www.watlow.com
1-800-WATLOW2 (1-800-928-5692)
wintechsupport@watlow.com
Safety Information
Symbol Explanation
“NOTE” An important detail or recommendation.
CAUTION - Warning or Hazard that needs further explanation
than the label on unit can provide. Consult User’s Guide for
further information.
Electrical Shock Hazard - Symbol (a lightning bolt in a triangle)
precedes an electric shock hazard CAUTION or WARNING
safety statement.
ESD Sensitive product, use proper grounding and handling
techniques when installing or servicing product.
Do not throw in trash, use proper recycling techniques or consult
manufacturer for proper disposal.
E73741 948Y
Unit is a Listed device per Underwriters Laboratories. It has
been investigated to ANSI/UL® 508 standards for Industrial Con-
trol Switches and equivalent to CSA C22.2 #14. For more detail
search for File E73741 on www.ul.com.
Unit is compliant with European Union directives.
WARNING! To avoid damage to property or equipment, injury, and
loss of life, adhere to applicable electrical codes and standard wiring
practices when installing and operating this product. Failure to do so could
result in damage, injury and death.
WARNING! All service including inspection, installation, wiring, main-
tenance, and troubleshooting must be performed only by properly qualied
personnel. Service personnel must read this manual before proceeding
with work. While service is being performed other, unqualied personnel
should not work on the unit or be allowed in the immediate vicinity.
WARNING! When in use the power controller is connected to dan-
gerous voltages. Do not service controller without rst disconnecting and
preventing power from being restored while servicing the power controller.
WARNING! Do not use in aerospace or nuclear applications.
WARNING! The power controller’s protection rating is IP20. It must be
installed in an enclosure that provides all the necessary additional protec-
tions appropriate for the environment and application.
WARNING! Ground the power controller via the provided protective
earth grounding terminal. Verify ground is within impedance specications
of UL 508A 0.1 ohm. This should be veried periodically.
WARNING! The installation must be protected by electromagnetic
circuit breakers or by fuses.
WARNING! When making live voltage or current measurements, use
proper personal protective equipment for the voltages and arc-ash
potentials involved.
WARNING! Verify the voltage and current ratings of the power
controller are correct for the application.
CAUTION: To avoid compromising the insulation, do not bend wire or
other components beyond their bend radius specications.
CAUTION: Protect the power controller from high temperature,
humidity and vibrations.
NOTE! Use only copper cables and wires rated for use at 90°C or
greater, unless otherwise noted.
SPECIFICATIONS
User Guide: www.watlow.com/kb/ASPYREAT
has complete specifications list.
WIRING
SAFETY
GUIDE
1241 Bundy Boulevard., Winona, Minnesota USA 55987
Phone: +1 (507) 454-5300, Fax: +1 (507) 452-4507
http://www.watlow.com
WATLOW INFO
CE DECLARATION
Declaration of Conformity
ASPYRE Series AT
WATLOW Electric Manufacturing Company.
1241 Bundy Blvd.
Winona, MN 55987 USA
Declares that the following ASPYRE Series AT
Classification:
Electric Power Control, Utilization Categories AC-51, AC-55b, AC-56a
Installation Category III, Pollution degree 2
Auxiliary Supply:
AUX power 24 Vdc + 10, -15%
Load Voltage and
Frequency:
100 to 480 Vac ± 10%3
50/60 Hz
Power Consumption:
Auxiliary Power 4 Watts maximum
Load current 12, 24 or 48 Amps maximum, see derating curves.
Environmental Rating:
IP20 with covers installed.
Meet the essential requirements of the following European Union Directives by using the relevant standards
show b elow to indicate compliance.
2014/30/EU Electromagnetic Compatibility Directive
EN 60947-1 2007:A1
2011, A2 2014
EN 60947-4-3 2014
Low Voltage Switchgear and Controlgear: Part 1 General Rules.
Part 4-3: Contactors and motor-starters - AC semiconductor controllers and
contactors for non-motor loads
EN 55011 2016:A1 2017
Industrial, scientific and medical equipment - Radio-frequency disturbance
characteristics - Limits and methods of measurement Class A Emissions. Group 1
Equipment.
CAUTION: This equipment not intended for use in residential environments and
may not provide adequate protection to radio reception in such environments.
For use in Class B environments, additional filtering on power lines required.
For use with Phase Angle control, additional filtering required to pass Class A
conducted Emissions.
EN 61000-3-2:20141
Electromagnetic compatibility (EMC) — Part 3-2: Limits — Limits for
harmonic current emissions (equipment input current ≤ 16 A per phase)
EN 61000-3-3:20131
Electromagnetic compatibility (EMC) — Part 3-3: Limits — Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply
systems, for equipment with rated current ≤ 16 A per phase and not subject
to conditional connection
EN 61000-4-2:2009
Electrostatic discharge immunity
EN 61000-4-3:2006
+A1/2008, A2/2010
Radiated, radio-frequency electromagnetic field immunity, 10 V/m 80 MHz to 1 GHz
3 V/m 1.4 to 2 GHz, 1 V/m from 2 to 2.7 GHz.
EN 61000-4-4:2012
Electrical fast-transient / burst immunity
EN 61000-4-5:2014
+A1/2017
Surge immunity2
EN 61000-4-6:2014 +
Corrigendum 2015
Immunity to conducted disturbances induced by radio-frequency fields 10 Vrms.
IEC 61000-4-11:2020
Voltage dips, short interruptions and voltage variations immunity
1Harmonics and Flicker for models ≤ 16 Amps only, above this and for industrial uses this is not applicable. Flicker requires extended cycle
times to comply. Up to 175 second cycle time at 16 Amps.
2AUX tested on primary side of Lambda DSP series 24 Vdc power supply.
3SCCR rating of 100,000 Amps Type 2 protection when using Eaton DFJ or Special purpose FWP fuse up to 60 Amps, or Class J, CC, CF, T,
fuse up to 30 amp rating. Type 1 protection if using Class J, CF, T fuse up to 60 amps or 10,000A rating with Eaton FAZ-NA circuit breaker at
240 Vac 30 Amps.
2014/35/EU Low-Voltage Directive
EN 60947-1 2007:A1
2011, A2 2014
EN 60947-4-3 2014
Low Voltage Switchgear and Controlgear: Part 1 General Rules.
Part 4-3: Contactors and motor-starters - AC semiconductor controllers and
contactors for non-motor loads
Compliant with 2015/863/EU RoHS Directive
Per 2012/19/EU W.E.E.E Directive Please Recycle Properly
Jeff Harrington
Winona, Minnesota, USA
Name of Authorized Representative
Place of Issue
Director of Operations
April 2022
Title of Authorized Representative
Date of Issue
Signature of Authorized Representative
Power Bases
• Single-phase, 1 controlled leg
Load Amp Range
• 12A, 24A and 48A options
(see derating curves in User Guide)
SCR and Amperage Rating
• SCCR rating 100,000A up to 480VAC
with coordinated fusing
• SCCR rating 10,000A up to 240VAC
with recommended circuit breaker
• Power dissipation: Approximately
1 to 1.2 watts per amp
• Leakage current: 1mA at 25°C
Environment
• 0 to 60°C (single unit) or 55°C
(multiple units) see derating
curves
• 5 to 90% RH (relative humidity),
non-condensing
Agency Approval and Regulatory
• UL® 508 Listing
• c-UL® Listed
• CE EMC Directive Class A
Emissions
• CE Safety Directive EN 60947-
4-3
• IP20
• RoHS 2015-863-EU
• W.E.E.E 2012-19-EU
• Enclosure Flammability Rating:
94-VO
August 2022, Part Number 2266-7027, Rev. -
SAFETY
Page 2
MOUNTING INSTRUCTIONS
Terminal Block A
Position Name Description
R1 Analog In 0-10V or 4-20mA analog input
referenced to pin S1. Can be con-
gured as 0-10V or 4-20mA via the
software interface.
S1 Analog In Reference
D1 Digital I/O1 Digital I/O 1 referenced to pin B1.
Can be congured as a 24V input,
output, or dry contact input via the
software interface.
B1 Digital I/O 1 Reference
D2
B2
Digital I/O 2
Digital I/O 2 Reference
Digital I/O 2 referenced to pin B2.
Can be congured as a 24V Input,
output, or dry contact input via the
software interface.
Terminal Block B
Position Name Description
J2 Relay NC Normally closed relay contact.
K2 Relay Com Relay connections rated for 240VAC
at 5A maximum.
L2 Relay NO Normally open relay contact.
Power and Ground Connections
Position Name Description
L1 Line Connection Line power connection
Torque= 24 (in.-lbs.)
T1 Switched Leg Switched power connection
Torque = 24 (in.-lbs.)
Ground
Screw Earth Ground #8-32 Screw head diameter: 0.341"
Torque = 15-17 (in.-lbs.)
Wire Selection, Prep and Torque
This section lists the recommended wire sizes for line power, load, earth ground and
control signal connections. There are also recommendations for insulation stripping
and termination torque.
Line Power and Load Wire Size and Termination
Stranded Wire Size Wire Termination Temperature Rating
14 to 10 AWG solid (1.5 to 6 mm2) Wire compression clamp 90°C or greater
14 to 6 AWG Stranded
(1.5 to 16 mm2) Wire compression clamp 90°C or greater
Ground Wire Size and Termination
Wire Size Wire Termination Temperature Rating
10 AWG (6 mm2) UL Listed (ZMVV) ring or spade crimp lug 75°C or greater
Control and Signal Wire Size
Range: 22 to 14 AWG (0.50 to 1.5 mm2) Recommended: 18 AWG (0.75 mm2)
Temperature Rating: 75°C or greater
Insulation Stripping and Torque
Insulation Stripping
Load & Line Power Bare wire connection: 0.59 in. (15 mm)
Connection with crimp lug: per lug manufacturer
Ground Per crimp lug requirements
Control and Signal 0.24 in. (6mm)
Control Signal and Ground Torque
Control & Signal 5 in.-lbs. (0.56 Nm)
Ground Screw 15 to 17 in.-lbs. (1.7 to 1.9 Nm)
Line Power and Load Torque
Recommended Tool Proper Torque
1/8 in. Hex Driver 24 in.-lbs. (2.7 Nm)
WIRE SELECTION
Terminal Block C
Position Name Description
+ 24VIN 24VDC power to the controller.
- GND 24VDC power reference to the controller.
CC/CZ Modbus® Common or
In ter-module bus common
MODBUS/WATBUS isolated bus
common. Congured per product part
number.
CA/CX
Modbus® A(-) or
Inter-module bus MODBUS/WATBUS isolated bus A sig-
nal. Congured per product part number.
CB/CY
Modbus® B(+)
Inter-module bus MODBUS/WATBUS isolated bus B sig-
nal. Congured per product part number.
G1 Retransmit 0-10V 0-10V retransmit output referenced to
pin F1.
F1 Retransmit Reference Retransmit ground reference.
H1 Retransmit 4-20mA 4-20mA retransmit output referenced to
pin F1.
Terminal Block D
Position Name Description
3 Reference Connect to the unswitched phase of the
heater.
3 Reference Connect to the unswitched phase of the
heater.
For assistance contact Watlow: www.watlow.com
1-800-WATLOW2 (1-800-928-5692)
wintechsupport@watlow.com
WIRE CONNECTIONS
LINE IN
LOAD
L2/NL1
Note: No
disconnect
or branch
circuit
protection
on neutral)
Output
Retransmit
+V - +I
RS-485
B+A-Com
- +
+24VDC
Power
Input
Digital
Input 2
- +
Digital
Input 1
- +
Analog
Input 1
- +
- +
4-20mA
0-10VDC
D2 B2
B1D1
S1 A
R1
Mini USB
USB
H1F1
G1
see above
9998 CL1
T1
3
D3
To PC with
COMPOSER
software
To other
ASPYRE AT
power
controllers
Line
Voltage
Measure-
ment
Load
Current
Measure-
ment
Optional
High-Speed Fuse
Load
Voltage
Measure-
ment
NOCNC
L2K2
J2 B
Relay
Output
CYCX
CZ
CBCA
CC Modbus® RTU
Inter-Module Bus
Protection
& Branch Circuit
Manual Disconnect
To earth ground
Ground
Branch circuit
protection
device may be
required per UL
Tap rule.
Inter-
module
Bus
Backplane
WIRING SCHEMATIC
Mounting Dimensions
The power controller may be mounted on a DIN rail or with screws.
See the tables and Illustrations on the page for the product dimensions, spacing, weight and mounting locations.
Model W H D Weight
12A/24A
DIN-Rail
w/Heat Sink
Option
Unit Width 36mm
(1.42in)
6.79 in.
(172 mm)
12A/24A: 5.88
in. (149 mm)
1.61 lb.
(0.73 kg)
Over-all Width
1.82 in. (46mm)
48A DIN-Rail
w/Heat Sink
Option
Unit Width 36mm
(1.42in)
6.79 in.
(172 mm)
48A:
7.07 in. (180
mm)
1.89 lb.
(0.86 kg)
Over-all Width
1.82 in. (46mm))
One Zone
Cooling Plate
Option
Unit Width 36mm
(1.42in)
7.29 in.
(185 mm)
3.97 in. (101
mm)
1.15 lb.
(.52 kg)
Over-all Width
1.82 in. (46mm)
Mounting Hole Size
Mounting hole diameter 0.177 in. (4.50 mm)
Note! The maximum thickness for the DIN rail is 1mm.
Recommended fastener: No 8-32 (M5)
W*
H
D
* See Unit Width and
Over-all Width Drawing
Below
0.91in
23.03mm
1.42in
36.07mm
0.38in
9.68mm
1.42in
36.07mm
6
.33in
160
.74mm
2.05in
52.10mm
Over-All Width
Unit Width
1.42in (36mm)
1.82in (46mm)
1.73in
44mm
Ground Screw
C
A
B
H
L1
D
BOTTOM VIEW:
TOP VIEW:
Optional
Ground
Screw Location
T
Note: Not all options identified below are on all units. See unit label for options present.
Line/Load Voltage 100 to 480 Vac 50/60 Hz
See terminal D for Line Sync connection.
SCCR rated 100,000
with special purpose
Eaton FWP fuses
or Eaton DFJ combi-
nation Branch/Special
purpose fuses.
See SCCR white paper
@ https://www.watlow.
com/-/media/docu-
ments/white-papers/
artcode-ulnec-require-
ment0322.ashx?
-
1
-
2
