Phason Supra-RS User manual

Phason Inc.
All rights reserved.
Printed in Canada
21040012
About the manual
The manual describes and explains how to use the features of Supra version 3.04. It does not
describe ventilation strategies or equipment you can connect to the Supra.
The following styles are used in the manual.
All buttons and menu commands are in a bold font.
For example: Scroll to the next line and then press ENTER.
All LCD display examples are in a dotted font.
For example: From the Main Menu, select Settings.
If a menu has a shortcut key, the number for the shortcut will be in brackets after the menu
name.
From the Maintenance menu, select Set Unit Name (5).
This is a hint or tip. It contains helpful information that might make it easier for you
to set up or use the Supra.
This is a note. It contains information that may help you better understand the
Supra.
This is a caution. It contains important information that you must follow when
installing or servicing the Supra. Failure to follow this information can lead to
damaged controls or equipment.
This is a warning. It contains important safety information that you must follow
when installing or servicing the Supra. Failure to follow this information can lead to
damaged controls or equipment, electrical shocks, or severe injury.

iii
How to use this manual
This section is a “quick-reference guide” of the manual. You can look at the chart on the next page
to help you find what you are looking for. If you are not sure where to find something specific, look
in the Table of contents at the front of the manual or the Index on page 147.
The following are some helpful suggestions.
If you have not installed and configured the Supra, read Chapter 2: on page 18 and Chapter 3:
on page 37.
If you are ready to install, configure, or program the Supra, use the worksheets starting in
Appendix D on page 123.
If you are not sure how to use the keypad or how to read the display and menus, read Becoming
familiar with the Supra on page 14.
If you need to program the Supra or adjust settings (set points, growth curves, fan speeds, etc.),
read Chapter 4: Programming on page 64.
If you have an alarm condition displayed and are not sure what to do, look up the message in
the Alarm messages table on page 117.
If you are not sure of the meaning of a term, look it up in the Glossary on page 111.
If you are monitoring and controlling a network of Supras using SupraWare, read
the SupraWare user manual for additional information.

iv
Quick reference chart
Supra overview, features, and accessories
Introduction to the display and menu structure
Keypad functions
Display characters and text
Chapter 1
Starting on page 9
Installation instructions
Equipment installation (probes, fans, actuators, and so on)
Electrical ratings
Supra layout (map of the inside and outside of the Supra)
Chapter 2
Starting on page 18
Configuration instructions
Zone, probe, and sensor assignments
Variable and relay stage assignments
Chapter 3
Starting on page 37
Programming instructions
Group settings (set points and growth curves)
Equipment settings (set points, fan speeds, and so on)
Alarm settings (bias, duration, silencing, and so on)
Security, including users and PINs
Chapter 4
Starting on page 64
Monitoring instructions
Daily, alarm, and audit logs
Status display
Acknowledging to alarms
Diagnostic tests
Manual override
Maintenance
Chapter 5
Starting on page 99
Glossary
Troubleshooting information
Factory settings
Installation worksheets
Configuration worksheets
Settings worksheets
Motor curves
Appendixes
Starting on page 111

v
Table of contents
Chapter 1: Introduction .......................................................................................................9
Introducing the Supra................................................................................................................................9
Features .................................................................................................................................................9
Available accessories ..........................................................................................................................11
Becoming familiar with the Supra............................................................................................................14
Using the keypad.................................................................................................................................14
Reading the display .............................................................................................................................15
Understanding the menu structure......................................................................................................16
Entering text in the Supra ....................................................................................................................17
Chapter 2: Installation........................................................................................................18
What you need to know before installing the Supra ...............................................................................18
Understanding power surges and surge suppression ........................................................................18
Reducing electrical noise using filters .................................................................................................19
Supra electrical ratings ........................................................................................................................20
Using power contactors to increase the capacity of relays.................................................................20
Supra exterior layout............................................................................................................................21
Supra interior layout ............................................................................................................................22
Mounting the Supra .............................................................................................................................23
Connecting equipment to the Supra .......................................................................................................24
Connecting actuators ..........................................................................................................................24
Connecting curtain machines..............................................................................................................26
Connecting single-stage heating or cooling elements........................................................................27
Connecting variable heating or cooling elements...............................................................................28
Using three-phase power ....................................................................................................................29
Connecting alarm systems ..................................................................................................................30
Connecting temperature probes .........................................................................................................31
Connecting a Relative Humidity Sensor ..............................................................................................32
Connecting a water meter ...................................................................................................................33
Connecting the power source .............................................................................................................34
Finishing the installation ..........................................................................................................................35
Verifying your connections ..................................................................................................................35
Closing the cover.................................................................................................................................35
Chapter 3: Configuration ...................................................................................................37
What you need to know before configuring the Supra ...........................................................................37
How zones work ..................................................................................................................................37
Configuration checklist ........................................................................................................................39
Configuring the main control functions ...................................................................................................40
Identifying the Supra............................................................................................................................41
Configuring the startup timer...............................................................................................................41
Setting the date and time ....................................................................................................................42
Selecting the temperature units...........................................................................................................43
Changing the type of temperature probe ............................................................................................43
Configuring temperature averaging ....................................................................................................44
Configuring the control stages ................................................................................................................46
Configuring variable stages.................................................................................................................47
Configuring relays for actuators ..........................................................................................................49
Calibrating actuators............................................................................................................................50

vi
Configuring relays for heating, cooling, or temperature-based duty cycles .......................................53
Configuring relays for curtains.............................................................................................................54
Configuring relays for time-based duty cycles ....................................................................................55
Configuring relays for timed events.....................................................................................................56
Testing the configuration .........................................................................................................................57
Configuring optional features ..................................................................................................................58
Configuring hysteresis .........................................................................................................................58
Configuring de-icing ............................................................................................................................59
Selecting a humidity zone ...................................................................................................................60
Configuring the pulse counter .............................................................................................................61
Selecting motor curves........................................................................................................................62
Configuring warnings ..........................................................................................................................62
Chapter 4: Programming...................................................................................................64
What you need to know before programming the Supra........................................................................64
Programming checklist........................................................................................................................65
Programming the zones ..........................................................................................................................66
Setting the group set point ..................................................................................................................66
Programming growth curves ...............................................................................................................67
Programming the tunnel mode set point.............................................................................................70
Programming the temperature setback...............................................................................................71
Programming the humidity control ......................................................................................................73
Programming the stages .........................................................................................................................75
Programming variable stages..............................................................................................................75
Programming actuator relays ..............................................................................................................78
Programming curtain control relays ....................................................................................................81
Programming heating and cooling elements and temperature-based duty cycles............................83
Programming timed events .................................................................................................................86
Programming time-based duty cycles.................................................................................................88
Programming the alarm and display settings .........................................................................................90
Programming alarm settings ...............................................................................................................90
Setting up the status display ...............................................................................................................93
Setting up security and users ..................................................................................................................94
Adding and removing users ................................................................................................................95
Changing PINs.....................................................................................................................................96
Enabling and disabling security ..........................................................................................................97
Chapter 5: Monitoring........................................................................................................99
Monitoring the Supra ...............................................................................................................................99
Monitoring the status display...............................................................................................................99
Acknowledging alarms ......................................................................................................................100
Reading the daily log .........................................................................................................................101
Reading the alarm log .......................................................................................................................102
Reading the audit log ........................................................................................................................103
Erasing the logs .................................................................................................................................103
Using manual override...........................................................................................................................104
Performing diagnostic tests...................................................................................................................105
Displaying information about each input...........................................................................................106
Monitoring power conditions .............................................................................................................107
Testing equipment connected to relays ............................................................................................108
Maintaining actuators ........................................................................................................................109
Resetting the Supra to its factory defaults.........................................................................................109
Adjusting the display contrast ...........................................................................................................110

vii
Appendixes ......................................................................................................................111
Appendix A: Glossary ............................................................................................................................111
Appendix B: Troubleshooting................................................................................................................117
Alarm messages ................................................................................................................................117
Troubleshooting.................................................................................................................................119
Determining correct actuator feedback wiring ..................................................................................121
Appendix C: Factory defaults ................................................................................................................122
Appendix D: Installation worksheet .......................................................................................................123
Appendix E: Configuration worksheets .................................................................................................125
Relay configuration worksheet ..........................................................................................................125
Variable stage configuration worksheet ............................................................................................126
Temperature averaging worksheet....................................................................................................127
Humidity zone worksheet ..................................................................................................................127
Pulse counter worksheet ...................................................................................................................128
De-icing worksheet ............................................................................................................................128
Hysteresis worksheet.........................................................................................................................129
Warnings worksheet ..........................................................................................................................130
Appendix F: Settings worksheets ..........................................................................................................131
Group set point worksheet ................................................................................................................131
Tunnel mode worksheet ....................................................................................................................131
Growth curve worksheet....................................................................................................................132
Variable stage settings worksheet.....................................................................................................133
Temperature setback worksheet .......................................................................................................133
Humidity compensation settings worksheet .....................................................................................134
Actuator settings worksheet ..............................................................................................................135
Curtain worksheet..............................................................................................................................137
Heating and cooling elements worksheet .........................................................................................138
Timed events worksheet....................................................................................................................139
Time-based duty cycle worksheet.....................................................................................................141
Alarm settings worksheet ..................................................................................................................142
Status screen display worksheet.......................................................................................................144
Security levels worksheet ..................................................................................................................145
Appendix G: Supra motor curves..........................................................................................................146
Index.................................................................................................................................147

viii

21040012 9
Chapter 1: Introduction
Introducing the Supra
All of us at Phason want to welcome you to the Supra 16-stage environmental control, the most
versatile and cost-effective 16-stage control available. The Supra is ideal for poultry, livestock,
greenhouse, or light-industrial buildings and is compatible with any ventilation strategy: natural,
forced, tunnel, and chimney ventilation.
Features
Four variable stages (heat or cool) with overload protection fuses
Twelve general-purpose relays (heat, cool, timed event, duty cycle, or actuator control)
Optional 0 to 10 V DC output
One alarm relay (for external alarm siren or alarm system)
Four-zone temperature monitoring and control
Outdoor temperature monitoring
Adjustable temperature settings, including two configurable seven-step growth curves
Temperature setback for day/night temperature (DIF) control
Water usage monitoring
Humidity monitoring and control
Staggered start for distributing backup generator initial startup load
Customizable alarm settings
Three-second full-power-turn-on for minimizing fan ice-up
Data logging of temperatures, alarms, and setting changes
Power-failure memory protection, including internal 24-hour clock
Five-level PIN security system
Four-line, backlit LCD display
On-board diagnostics and self-tests
Thirty-foot temperature probe, extendable to 500 feet (additional probes available)
NEMA 4X enclosure
CSA approval
Limited warranty (two years)

Chapter 1: Introduction
10 Phason
Some features require additional sensors or equipment. Water usage requires a water meter with
pulse output. Humidity monitoring and control requires a Relative Humidity Sensor. Additional
zones or outdoor temperatures require additional temperature probes.
A powerful four-zone controller
The Supra automatically monitors and controls the temperature in up to four separate zones. The
Supra controls the temperature in each zone by operating ventilation equipment such as fans,
heaters, inlet actuators, curtain machines, or other equipment according to your programmed
settings.
The Supra has two seven-step growth curve programs you can configure for up to 250 days. This
powerful feature automatically adjusts the temperature set points over time to control the
temperature in a room or zone.
More than just temperature control –monitor water usage and control humidity
Not only can the Supra monitor and control temperatures using ventilation equipment, it can
monitor water usage and control humidity.
The Supra’s pulse counter allows you to connect a water meter (with pulse output) and monitor
water usage. With an optional Relative Humidity Sensor, you can monitor humidity and
automatically adjust your ventilation control strategy accordingly.
Temperature setback for day/night temperature control in greenhouses
Temperature setback allows you to automatically change the temperature set point for specific
periods during the day. When temperature setback is enabled, the Supra subtracts the setback
amount from the set point. At the end of the setback period, the Supra returns to the normal set
point.
Temperature setback is ideal for maintaining different method (DIF) and in greenhouses.
Security and peace of mind
The Supra has a five-level PIN (personal identification number) security system. Each level has
access to different menus of the Supra. When you enable security, users must enter their PIN before
they can access a specific menu or function. This allows you to track who makes changes to your
system and its settings.
The Supra is compatible with most alarm sirens and alarm systems. You can connect the Supra to an
alarm siren or other external alarm system. The customizable list of alarm settings allows you to
choose which alarm conditions you want to be notified about. The Supra automatically logs all alarm
conditions.

Introducing the Supra
21040012 11
Easy to use and program
The Supra’s four-line, backlit LCD display shows alarm conditions such as high and low
temperatures, power failure, and low line voltage. The easy-to-use keypad and menu system make
the Supra one of the easiest controls to program. The Supra’s advanced and powerful features are
never more than a few keystrokes away.
Standalone control or a network of Supras
You can use the Supra in one of two ways.
As a standalone Supra control
The Supra is a standalone control. You do all programming at the control using the keypad.
As one of a network of Supra controls
Using SupraWare software, you can connect up to 32 Supras together at distances up to 4000
feet (1220 metres). SupraWare allows you to monitor and configure your Supras from a personal
computer. If you are running SupraWare, you can still make changes at the controls using the
keypad.
Available accessories
For more information about Phason accessories, contact your dealer or visit www.phason.ca.
Slave units
The Single-Phase Slave (PSU-20) is an affordable way to increase the load capacity of the Supra.
Single-Phase Slaves are easy to install and there is no additional configuration required; all slave units
follow the settings of the master Supra.
The PSU-20 comes with a cable that connects to either the VR3 or VR4 connection on the Supra.
When the PSU-20 is connected to variable stage 3 (VR3), it follows the Supra’s settings for variable
stage 3. When connected to variable stage 4 (VR4), it follows the settings for that stage. It’s that easy!
You can connect up to three Single-Phase Slaves to each of the Supra’s variable stages 3 and 4. Each
slave unit increases the current capacity of the stage by 20 A. For more information about slave
units, contact your dealer or visit www.phason.ca.
PSU-20 features
One variable AC output
Expandable capacity using additional slaves
NEMA 4X enclosure
CSA approval
Limited warranty (two years)

Chapter 1: Introduction
12 Phason
Variable DC Expansion Kit
The Variable DC Expansion Kit (K210050) allows you to connect
equipment that requires a 0 to 10 V input, such as variable
frequency drives.
The expansion kit installs in seconds and has four outputs you can
configure for cooling or heating. Each output has its own settings
and functions the same as the Supra’s other variable stages.
Supra Saver
The Supra Saver is an innovative and easy-to-use product that allows you to store Supra
configuration and settings.
The Supra Saver stores a complete copy of all a Supra’s configuration and settings. The Supra Saver
saves time and makes storing or transferring settings and configuration easy. You can even use the
Supra Saver to set up new Supras in seconds!
Supra Saver features
Quick and easy to use
Portable, reliable, and safe storage of configuration and settings
Transferable to any Supra with the same firmware version
Compact design that fits in a pocket
Limited warranty (90 days)
Supra firmware updater
The Supra firmware updaters, Intaglio and Supra Updater, are innovative and easy-to-use products
that allow you to upgrade your Supra's firmware. Firmware updaters take only seconds to use and
can upgrade all the Supras at your site.
If your Supras are version 3, use a Supra Updater to upgrade your firmware to the latest release.
If your Supras are version 2 or earlier, use an Intaglio to upgrade your firmware to the latest
version 2 release.
Firmware updater features
Quick and easy to use
Reloadable and reusable
Compact design that fits in a pocket
Limited warranty (90 days)

Introducing the Supra
21040012 13
Temperature probes and extension cable
Temperature probes monitor temperatures ranging from -49 to 122°F (-45 to 50°C). The probes are
available in 1, 6, 30, 75, or 150-foot cable lengths and can extended up to 500 feet using extension
cable. Extension cable is available in 500-foot lengths.
Temperature probe features
Easy installation
Rugged and durable design
Weather and UV-resistant cable
Limited warranty (90 days)
Relative Humidity Sensors
The Relative Humidity Sensor comes in two models: RHS and RHS-P.
The RHS is designed to monitor relative humidity at the Supra. The RHS comes with the mounting
hardware to mount the sensor to the control enclosure.
The RHS-P is designed to monitor relative humidity up away from the control. The RHS-P comes
with the mounting hardware and cable to mount the sensor up to 100 feet (30.5 metres) away from
the control.
RHS features
Easy installation
100-foot weather and UV-resistant cable (RHS-P only)
Limited warranty (90 days)
SupraWare
SupraWare allows you to configure and monitor all the Supra controls at your site from a personal
computer. You can connect up to 32 Supras together at distances up to 4000 feet (1220 metres).
SupraWare eliminates the need to go to a control to check settings or make changes, you can do it all
from one location. SupraWare’s easy-to-read displays show you control settings, temperatures, and
alarms. The software maintains logs of temperatures, alarms, and system changes and includes four
reports and a chart to help you analyze the information.

Chapter 1: Introduction
14 Phason
SupraWare features
Convenient, easy-to-use displays
Control and status information displays
Enhanced data logging
Four reports and one chart
Backup and restore utility
Third-party software compatibility
Becoming familiar with the Supra
The Supra has a 4-line, backlit LCD display and 16-button keypad that allow you program and
monitor the control.
Using the keypad
Usually the Supra displays the status screens that show
information about the control elements. The example on the
right is one of several available status screens. For more
information about status screens, see Setting up the status
display on page 93.
To display the Main Menu from the status screen, press
ENTER.
For an overview of the Supra menu, read Understanding the
menu structure on page 16.
Increase a value
Toggle an option
Decrease a value
Toggle an option
Scroll up through a menu or display
Scroll down through a menu on display
Cancel changes
Return to previous menu or display
Select an option
Save changes
Phason Supra
Tue May 31
11:14:48 AM
Outside: 72°F
MAIN MENU
1 Settings
2 Maintenance
3 View Logs

Becoming familiar with the Supra
21040012 15
To select an items from the menu
Press Up or Down to move the cursor over the number beside the item you want to select and
then press ENTER.
or
Press the number corresponding to the item.
For example, to select Maintenance, press
2or move the cursor over the 2and then press
ENTER.
If a menu has a shortcut key, the number for the shortcut will be in brackets after the
menu name in the instructions. For example, From the Maintenance menu, select
Set Unit Name (5).
If the menu item you want to select has a number higher than nine, you cannot
select that item by typing its number. You must move the cursor over the number
and then press ENTER.
If there is an alarm condition, you will see the alarm screen instead of the status
screen. You must acknowledge the alarm before you can proceed. For more
information, read Acknowledging alarms on page 100.
Reading the display
When you switch on the power to the Supra, the display on
the front looks like the one to the right. The display has 4
lines with 20 character positions on each line.
On some screens, there can be several lines of information
available. To see the remaining lines of information, you
need to “scroll”.
To scroll down, press the Down () button on the
keypad to show a new line.
To scroll up, press Up ().
For example, when you go to the Main Menu, you see a
display screen like the one to the right.
Press Down three times to get to the View Logs line.
Press Down once more, then the next line displays and the
first line scrolls up out of sight.
Cursor
MAIN MENU
1 Settings
2 Maintenance
3 View Logs
Phason Supra
Tue May 31
11:14:48 AM
Outside: 72°F
1 Settings
2 Maintenance
3 View Logs
4 Security
MAIN MENU
1 Settings
2 Maintenance
3 View Logs

Chapter 1: Introduction
16 Phason
Understanding the menu structure

Becoming familiar with the Supra
21040012 17
Entering text in the Supra
When configuring the Supra, you need to assign names to the elements you are controlling. For
example, if you have a fan connected to a variable stage, you might want to call it “VS fan 36-inch”.
You can enter the following characters characters into the Supra.
(space)
'
.
5
<
C
J
Q
X
_
f
m
t
!
(
/
6
=
D
K
R
Y
`
g
n
u
"
)
0
7
>
E
L
S
Z
a
h
o
v
#
*
1
8
?
F
M
T
[
b
i
p
w
$
+
2
9
@
G
N
U
¥
c
j
q
x
%
,
3
:
A
H
O
V
]
d
k
r
y
&
-
4
;
B
I
P
W
^
e
l
s
z
When entering text, use the +or –keys to display different characters in order.
If there is already a character under the cursor when you press +or –, the display starts at that
letter and moves up or down.
For example, if the letter Ais displayed, pressing + displays the letter B. Pressing –displays the
character @.
To enter text
1. Scroll to the position where you want to enter text and then press ENTER.
2. Press +or –until you see the character you want to enter.
3. Press ENTER.
4. Repeat steps 1 to 3 for the each character you want to enter.
There is a quick way to “jump” to some characters. Select the shortcut character
closest to the letter you want and then press +or –until you display the character
you want.
To display this shortcut …
Press this key
To display this shortcut …
Press this key
(Space)
0
l
5
a
1
O
6
e
2
R
7
g
3
U
8
I
4
x
9

21040012 18
Chapter 2: Installation
What you need to know before installing the Supra
1. Read Understanding power surges and surge suppression below.
If you do not install external surge suppression devices, you risk damage to
the electronics inside the Supra, which may cause the Supra to fail.
Because it is not possible to completely protect this product internally from
the effects of power surges and other transients, Phason highly recommend
that you install external surge suppression devices. For specific
recommendations, see your electrical contractor.
If you do not take these precautions, you acknowledge your willingness to
accept the risk of loss or injury.
2. Using the installation worksheets in Appendix D (starting on page 123), list all the equipment you
want to control using this Supra. Install the equipment and make your electrical connections
according to the sheet.
3. Using the configuration worksheets in Appendix E (starting on page 125), decide which relays
you want to use for each piece of equipment, and how you want the equipment organized by
zone in the Supra. You can connect more than one piece of equipment to a single relay as long
as the total amps do not exceed the relay’s limit. For more information about the control
ratings, see Supra electrical ratings on page 20.
Understanding power surges and surge suppression
Power surges can be caused by external influences (outside the barn –for example, lightning or
utility distribution problems) or they can be caused internally (inside the barn –for example, starting
and stopping inductive loads such as motors).
One of the most common causes of power surges is lightning. When lightning strikes the ground, it
produces an enormously powerful electromagnetic field. This field affects nearby power lines, which
transmit a surge to any device connected to it, such as lights, computers, or environmental controls
like the Supra. Lightning does not have to actually strike a power line to transmit a surge.
Surge suppression devices offer some protection from power surges. Because it is not possible to
internally protect this product completely from the effects of power surges and other transients,
Phason highly recommends that you install external surge suppression devices. For specific
recommendations, see your electrical contractor. If you do not take these precautions, you
acknowledge your willingness to accept the risk of loss or injury.

What you need to know before installing the Supra
21040012 19
Reducing electrical noise using filters
Electrical noise is caused by high voltage transients created when inductive loads, such as power
contactors, are switched on or off. The strength of the transients can be over 1000 volts and can
vary with the type of equipment and wiring, as well as several other factors.
“Visible” symptoms of electrical noise include erratic control operation, cycling inlets,
communication problems, and more. However, the effects of electrical noise are not always visible.
Over time, electrical noise can cause electronic circuits, relay contacts, and power contactors to
deteriorate.
Phason highly recommends installing filters on all inductive loads.
Installing filters helps extend the life of equipment
Filters help prevent electrical noise problems by absorbing the transient energy. Even if you do not
have visible symptoms of electrical noise, filters help keep controls operating reliably and can
extend the life of the controls and equipment connected to them.
Phason’s snubber filters (part number 127-0) are intended for use with solenoids, timer relays, DC
motors, furnaces, and other equipment connected to the control’s relays. You can also use the filters
with loads connected to power contactors.
Install a filter in parallel with the load, as shown in the following example.
Some power contactors include snubber filters. For more information, read
Using power contactors to increase the capacity of relays on page 20.
For more information about snubber filters or other Phason accessories, see
your dealer or visit www.phason.ca.

Chapter 2: Installation
20 Phason
Supra electrical ratings
Input power
Fuse (F5)
120/230 VAC, 50/60 Hz
1 A, 250 VAC non-time-delay glass
Variable stages 
(4: VAR1 to VAR4)
Fuses (4: F1 to F4)
10 A at 120/230 VAC, general-purpose (resistive)
7 FLA at 120/230 VAC, PSC motor 
1/2 HP at 120 VAC, 1 HP at 230 VAC, PSC motor
15 A, 250 VAC ABC-type ceramic
Relays 
(12: RLY1 to RLY12)
10 A at 120/230 VAC, general-purpose (resistive)
1/3 HP at 120 VAC, 1/2 HP at 230 VAC
360 W tungsten at 120 VAC
Alarm relay
0.4 A at 125 VAC; 2 A at 30 VDC, resistive load
0.2 A at 125 VAC; 1 A at 30 VDC, inductive load
You can connect more than one piece of equipment to a variable stage or relay as long as they are the same type (for
example, two fans), and the total current draw (load) is within the limits.
The FLA (full load ampere) rating accounts for the increase in motor current draw when the motor operates at less
than full speed. Make sure the motor/equipment connected to the variable stage does not draw more than the FLA rating.
Actuators require two relays: one for opening, one for closing. You can connect a maximum of two actuators.
Tip: You can increase the load capabilities of the Supra´s variable stages 3 and 4 by connecting slave units. Each slave
unit increases the current capacity of the stage it is connected to by 20 A. For more information, read Slave units on
page 11.
Using power contactors to increase the capacity of relays
Phason’s 240-volt power contactors are heavy-duty relays that allow you to increase the load
handling capability of control relays. Power contactors are ideal for secondary ventilation fans and
electric heaters.
Phason’s power contactor relays have the following electrical ratings.
Coil: 10.2 mA at 240 VAC
Contact: 25 A at 240 VAC; resistive
2 HP at 240 VAC, 1 HP at 120 VAC; motor, power factor 0.4
1300 W at 120 VAC; tungsten
Phason offers three power contactor options.
Power contactor relay (model PC-240) –includes power contactor relay and mounting hardware
for easy mounting in an enclosure.
Power contactor kit (model 122-1) –includes power contactor relay, on-off-auto switch and
label, snubber filter (reduces electrical noise), and mounting hardware for easy mounting in an
enclosure.
Power contactor unit (model 129-0) –includes two power contactor relays, two on-off-auto
switches, and two snubber filters, mounted in a large enclosure. The enclosure has room for two
additional contactor relays or kits.