Chromalox MiniMax Digital Series Manuel utilisateur
PK565
User’s Manual
P/N 0037-75589
www.chromalox.com
800-443-2640
© 2021 Chromalox, Inc.
MiniMax Digital
- 1 -
© 2021 Chromalox®, Inc.1-888-996-9258
Thank you for choosing the Chromalox®MiniMax™ - a complete power control solution with industry-best
price and performance.
For more than 80 years, customers have relied on Chromalox for the utmost in quality and innovative solu-
tions for industrial heating applications. Chromalox manufactures the world’s largest and broadest line of
electric heat and control products.
The MiniMax Series SCR Controllers provide the best control for applications where consistent heater/pro-
cess temperature is critical or where fine resolution of power is required.
Common MiniMax features include:
• 120 - 575 Vac @ 30 - 75 Amps
• Isolated Control Circuit
• Easy Customer Interface
• Remote Stop
• Compact Size and Construction
• dv/dt Transient Voltage Protection
• MOV Protection
• Automatic 50/60 Hz line sensing
Features for the MiniMax 1, 2, and 3 include:
• Zero Crossover Firing
• Isolated Control Circuit
On/Off Control Inputs:
120 thru 240 Vac
5 - 32 Vdc
Dry Contact Closure
Proportional (DOT Firing) Inputs:
4 - 20 mA, 0-5 Vdc, 1 - 5 Vdc, 0 - 10 Vdc
Remote Manual Adjust (Optional)
Remote Auto/Manual Switch (Optional)
• Electronically Protected with Temperature Warning and Stop System
• Cycle Resolution 3,5,7,11,13,17,19
• Shorted SCR Detection (Optional)
• Soft Start
• Time Proportional Switching Mode
• Staged Heating
• Rotary Swtich Selection of Input, Leg Configuration, Modbus
Features for the MiniMax 1P include:
• Phase Angle Firing
• Isolated Control Circuit Inputs
0 - 5 mA, 0 - 20 mA
0 - 50 mA, 1 - 5 mA
4 - 20 mA, 10 - 50 mA
0 - 5 Vdc, 0 - 10 Vdc
• Optional Current Limit
• Soft Start
• Line Voltage Compensation
• Zero & Gain Adjustments
• Built-In Manual Adjustment
• Current Limit Adjustment (Optional)
If you have application questions, refer to the Engineering Resource section of our website at
www.chromalox.com to find the answer you’re looking for, or call one of our application engineers
at 1-888-996-9258 for personal assistance.
- 2 - © 2021 Chromalox®, Inc. 1-888-996-9258
Table of Contents
Section Topic Page
1................................................. Important Safeguards..................................................................................... 3
2................................................. Description ..................................................................................................... 4
3................................................. Before You Install............................................................................................ 5
4................................................. Installation ...................................................................................................... 6
4.1................................. Mounting......................................................................................................... 6
4.2................................. Wiring.............................................................................................................. 8
4.2.1................. Power/Load Wiring......................................................................................... 8
4.2.2................. Instrument Power ......................................................................................... 11
4.2.3................. Grounding .................................................................................................... 11
4.2.4................. Command Signal Wiring............................................................................... 11
4.2.5................. Calibration .................................................................................................... 17
5................................................. Specifications ............................................................................................... 18
6................................................. Maintenance ................................................................................................. 19
7................................................. Troubleshooting ............................................................................................ 20
8................................................. Parts and Accessories.................................................................................. 21
9................................................. Warranty and Return Information ................................................................. 22
- 3 -
© 2021 Chromalox®, Inc.1-888-996-9258
Please read all instructions before installing and operating your MiniMax.
Before working inside the equipment, confirm that all power has been turned off,
locked off, and preferably earthed [grounded] at all points of low and high potential,
on both the supply line and load side circuits, as required / permitted by all codes
and standards.
Personnel working with or near high voltages should be familiar with modern methods of
resuscitation. Contact an area supervisor or safety personnel for more information.
Throughout the MiniMax User Manual, the safety alert and the international electric shock/
electrocution symbols will alert you to potential hazards. Safety precautions should always
be followed to reduce the risk of personal injury to persons from fire and electrical shock
hazards.
Each safety message is preceded by a safety alert symbol and one of three words: DAN-
GER, WARNING, or CAUTION. These mean:
DANGER You WILL be killed or seriously hurt if you do not follow instructions.
WARNING You CAN be killed or seriously hurt if you do not follow instructions
CAUTION You CAN be hurt if you do not follow instructions.
Damage Prevention Messages:
You will see other IMPORTANT messages that are proceeded by the word CAUTION
that are intended to help prevent damage to the MiniMax or other equipment. Note that
Damage Prevention Messages are NOT accompanied by the Safety Alert Symbol.
Key Safety Practices
All personnel working on high voltage electrical equipment must adhere to all national and
local regulations, codes, and standards.
Only suitably qualified and experienced persons, who are familiar with this equipment, and
the work they are to do, should carry out installation, commissioning, operation, or mainte-
nance of this panel and the associated heater.
Such persons shall adhere to proper high voltage safety procedures, including the use of
appropriate personal protective equipment (ppe).
Failure to adhere to any of the above may result in equipment damage, operating losses,
injury, or death. Chromalox will not be liable for failure to adhere to all governing regula-
tions, codes, standards, site procedures and information given in this manual.
The MiniMax User Manual uses this symbol to
alert personnel to potential hazards that may
damage the equipment.
The MiniMax User Manual uses this symbol to
alert personnel to potential hazards that may
cause injury or death.
IMPORTANT SAFEGUARDS
1
Important Safeguards
- 4 - © 2021 Chromalox®, Inc. 1-888-996-9258
2
† This can be set to three cycles ‘On’ / three cycles ‘Off’ (see section on installation options).
Description
MiniMax 1, 2, and 3
The Chromalox MiniMax 1, 2, and 3 controllers are highly versatile SCR Power Paks with optional plug-in
proportional firing and shorted SCR detection boards. Firing modes include On/Off and DOT proportional
zero voltage switching. Chromalox exclusive DOT (Demand Oriented Transfer) firing technique switches the
fewest number of cycles to provide the most precise zero crossover control. At 50% output, the unit’s output
alternates between one cycle “On” and one cycle “Off.” At 51%, the output continues with one cycle “On,”
one cycle “Off,” and gradually integrates one extra “On” cycle for the additional 1%. This DOT fired tech-
nique also minimizes temperature overshoot, temperature fluctuations and helps extend the load’s element
life due to reduced thermal shock.
The power SCR assemblies consist of one, two, or three pairs of SCRs connected back to back (with an op-
tional semiconductor fuse), RC Snubber, and MOV protection. The firing circuit is based on a common On/
Off control board with plug and play Shorted SCR and DOT fired plug-in boards. Diagnostic indicators are
included. Plug-in terminal blocks for easy customer interface are also provided.
MiniMax 1P
The Chromalox MiniMax 1P utilizes Single Phase, Phase Angle firing to modulate power to an inductive or
resistive load. Phase Angle control has the advantage of proportioning every cycle thereby providing very
fine resolution of power. Fast responding loads in which the resistance changes as a function of temperature
require Phase Angle control. The MiniMax 1P offers a Soft Start feature that assures that the load power is
gradually increased from zero to the value set by the command signal in the event of a power interruption.
In addition, optional Current Limit is used to protect the load, SCR controller and the total system from large
surge currents that could occur at start-up.
- 5 -
© 2021 Chromalox®, Inc.1-888-996-9258
3
Before You Install
READ AND UNDERSTAND BEFORE
CARRYING OUT THE WORK DETAILED BELOW
Immediately after receiving your MaxPac I, II, III or IP Series Controller, visually inspect
the shipment packaging and record any damage on the shipping documents. Unpack the
controller and carefully inspect for obvious damage due to shipment. If any damage has
occurred, YOU must file a claim with the carrier company, since the carrier company will
not accept a claim from the shipper (Chromalox).
Be sure to check the model number and verify that you have received the correct Model of
controller.
If the controller is not installed and placed into operation immediately, it should be stored
in a cool, dry environment. Temperature extremes and excessive moisture can damage the
controller.
Before choosing a location in which to mount your MaxPac, please consider the following:
Temperature
When mounting the SCR unit in a control panel, attention should be paid to the
enclosure temperature. The SCR is rated to perform at its nameplate current rating
in temperatures up to 50˚C (122˚F). Ensure that adequate ventilation is provided or
some other method of maintaining the correct cabinet temperature is used.
Cleanliness
Careful attention must be paid in areas subjected to airborne particles. The efficien-
cy of the heat sinks relies on their conducting surfaces being maintained in a clean
manner. (See the Maintenance Section.)
Dampness
High humidity or hosing down a unit should be avoided.
Clearance
Choose a location that will provide adequate spacing around the unit when mount-
ed. This will ensure proper air flow necessary to cool the device.
WARNING
HAZARDOUS VOLTAGE: Disconnect and lockout power before
installing or servicing. Failure to comply could result in per-
sonal injury or equipment damage.
- 6 - © 2021 Chromalox®, Inc. 1-888-996-9258
4
Installation
READ AND UNDERSTAND BEFORE
CARRYING OUT THE WORK DETAILED BELOW
Please read all information in this section before beginning the installation of your MiniMax.
Installation of the MiniMax requires three steps:
1. Mounting
2. Power wiring
3. 120 or 230 Vac 50/60hz for instrument power. See 4.2.4, pg. 11.
4.1 - Step 1: Mounting
Before mounting your MiniMax, please read the section titled “Before You Install’ on page 5 for a description
of an ideal environment for the unit’s operation.
The space required for mounting the MiniMax Power Pak depends upon the model. The table below refers to
the figures on the following pages. These figures illustrate the dimensions and mounting holes for the vari-
ous MiniMax Power Pak models. Please refer to these figures before mounting your unit.
Figure Model
1................... MiniMax 1 – 30 & 50 Amp Mounting Base
1................... MiniMax 1P – 30 & 50 Amp Mounting Base
2................... MiniMax 1 – 75 Amp Mounting Base
2................... MiniMax 1P – 75 Amp Mounting Base
3................... MiniMax 2 – 30 & 50 Amp Mounting Base
4................... MiniMax 2 – 75 Amp Mounting Base
5................... MiniMax 3 – 30, 50 & 75 Amp Mounting Base
IMPORTANT: Please note that the figures on the following pages are
not drawn to the same scale.
- 7 -
© 2021 Chromalox®, Inc.1-888-996-9258
Figure 1 Figure 2
Figure 3
Figure 4
Figure 5
MINIMAX 1 & 1P 30 & 50 AMP
MOUNTING BASE
GND
6.50 (165.10MM)
7.50 (190.50MM)
ø.28 (ø7.14MM)
(4 PLACES)
4.00
(101.60MM)
3.25
(82.55MM)
.75
(19.05MM)
.00
(0.00MM)
MINIMAX 1 & 1P - 75 AMP
MOUNTING BASE
GND
8.50 (215.90MM)
9.50 (241.30MM)
0.00
(0.00MM)
0.75
(19.05MM)
3.25
(82.55MM)
4.00
(101.60MM)
ø.28 (ø7.14MM)
(4 PLACES)
MINIMAX 2 – 30 & 50 AMP
MOUNTING BASE
GND
8.5 (215.90MM)
9.50 (241.30MM)
0.00
(0.00MM)
0.75
(19.05MM)
3.25
(82.55MM)
4.00
(101.60MM)
ø.28 (ø7.14MM)
(4 PLACES)
MINIMAX 2 – 75 AMP
MOUNTING BASE
GND
13.00 (330.20MM)
14.00 (355.60MM)
0.00
(0.00MM)
0.75
(19.05MM)
3.25
(82.55MM)
5.00
(127.00MM)
ø.28 (ø7.14MM)
(4 PLACES)
13.00 (330.20MM)
14.00 (335.60MM)
0.00
(0.00MM)
0.75
(19.05MM)
3.25
(82.55MM)
8.25
(209.55MM)
MINIMAX 3 – 30, 50 & 75 AMP
MOUNTING BASE
GND
5.75
(146.05MM)
10.00
(254.00MM)
ø.28 (ø7.14MM)
(4 PLACES)
- 8 - © 2021 Chromalox®, Inc. 1-888-996-9258
4.2 - Step 2: Wiring
Careful attention must be paid when attaching the wiring to the MiniMax to ensure proper and safe opera-
tion. This section contains detailed information on how to connect the power, resistive load, ground, and
command signal wiring.
IMPORTANT: Select installation wiring that is in accordance with the National
Electrical Code and any local standards that may be applicable.
WARNING
HAZARDOUS VOLTAGE: Only qualified personnel should per-
form electrical wiring for the MiniMax Power Paks. LETHALLY
HIGH VOLTAGES are associated with this equipment and are
dangerous if improperly installed.
WARNING
The following wiring instructions are for the Digital Minimax
only. If using Analog Minimax, contact factory for appropriate
wiring schematics. Analog Minimax is designated as MMAXI, II,
or III followed by the number 1, 2, 3, or 4 under the firing mode.
4.2.1 - Power/Load Wiring
The following illustrations depict how to connect the MiniMax to a resistive or inductive load. Make sure you
refer to the correct illustration for the MiniMax series you have purchased.
MINIMAX1
L2
L1 X1
Single Phase
Resistive
L2 Connection is
NOT on MiniMax
Ce manuel convient aux modèles suivants
4
Table des matières
Autres manuels Chromalox Unité de contrôle
Manuels Unité de contrôle populaires d'autres marques
Festo
Festo Compact Performance CP-FB6-E Manuel de la liste des pièces
Elo TouchSystems
Elo TouchSystems DMS-SA19P-EXTME Manuel utilisateur
JS Automation
JS Automation MPC3034A Manuel utilisateur
JAUDT
JAUDT SW GII 6406 Series Guide rapide
Spektrum
Spektrum Air Module System Manuel utilisateur
BOC Edwards
BOC Edwards Q Series Manuel utilisateur
