Ulvac STC-2A Series User manual

D/N.MFST200E,2022DR10 ULVAC CRYOGENICS INCORPORATED
SUPER TRAP HEATER
CONTROLLER
STC-2A series
Instruction Manual
Export Control Policy
We recommend that ALL customers be sure to follow all
rules and regulations such as Foreign Exchange and
Foreign Trade Law when exporting or reexporting our
products.

MZ0F001E,2013OR03 ULVAC CRYOGENICS INCORPORATED F-1
Introduction
Thank you for choosing our products. This instruction manual gives
information and precautions on handling, installation, operation, and
maintenance of the product.
This product is intended for use by qualified personnel who recognize shock
hazards and are familiar with the safety precautions required to avoid possible
injury. To ensure proper use of this product, read this instruction manual
carefully and keep this manual close at hand so that you can use for reference
during operation.
If you purchased our other products and/or optional devices with this product,
read relevant instruction manuals carefully.
1. About the personnel who are involved in handling our products
All personnel involved in handling our products should take a general safety
education and training that is officially accepted in the country where our product
is used. The personnel are also required to have specialized knowledge/skills and
qualification on the electricity, the machinery, the cargo handling, and the vacuum.
Especially, the personnel should be familiar with handling a cryopump in order to
use it safely. Since we offer a training session (which is subject to fees) as needed
for people who use cryopumps for the first time, please do not hesitate to contact
our Service Engineering Division to join the training session.
2. Warranty
2.1 Gratis warranty period and Warranty coverage
【Gratis warranty period】
Note that an installation period of less than one year after installation in your
company or your customer’s premises or a period of less than 18 months (counted
from the date of production) after shipment from our company, which is shorter, is
selected.
【Coverage】
(1) Failure diagnosis
As a general rule, diagnosis of failure should be done on site by customer.
However, ULVAC CRYOGENICS or our service network can perform this service
for an agreed fee upon the customer’s request. There will be no charge if the cause

F-2 ULVAC CRYOGENICS INCORPORATED
of the breakdown is found to be a fault of ULVAC CRYOGENICS.
(2) Damage during transportation
When damage by delivery/transportation is admitted, the product will be
repaired free of charge within the range of the guarantee expressed in the sales
contract.
(3) Breakdown repairs
There will be a charge for breakdown repairs, replacements and on-site visits
for the following seven conditions. In those cases the cost shall be your own
expense even though the product is within the warranty period.
①Breakdowns due to improper storage or handling, careless accident, software
or hardware design by the customer.
②Breakdowns due to modifications of the product without consent of the
manufacturer.
③Breakdowns due to maintenance of the product without authentic parts or
breakdowns resulting from using the product outside the specified
specifications of the product.
④Breakdowns due to contamination or corrosion caused by user’s use
conditions.
⑤Breakdowns due to natural disasters (such as fire, earthquake, flood,
lightning, salt damage, and so on) , environmental pollution, irregular voltage,
and /or usage of undesignated power source.
⑥Breakdowns that are outside the terms of warranty.
⑦Consumables and/or replacement service.
Since the above services are limited to within Japan, diagnosis of failures, etc are
not performed abroad. If you desire the after service abroad, please contact
ULVAC CRYOGENICS and consult us for details in advance.
2.2 Exclusion of opportunity loss from warranty liability
Regardless of the gratis warranty term, compensation to opportunity losses
incurred to your company or your customers by failures of ULVAC CRYOGENICS
products and compensation for damages to products other than ULVAC
CRYOGENICS products and other services are not covered under warranty.

MZ0F001E,2013OR03 ULVAC CRYOGENICS INCORPORATED F-3
2.3 Repair period after production is discontinued
ULVAC CRYOGENICS shall accept product repairs for seven years after
production of the product is discontinued.
3. Service Form
After the products are delivered, please fill out the following information in the
blanks. If you have any questions or technical problems, please feel free to contact
the nearest Customer Support Center or headquarters. Please refer to “Service
Network”.
Cryopump／Super trap Model ：
Cryopump／Super trap Serial No. ：
Refrigerator Model ：
Refrigerator Serial No. ：
Compressor Model ：
Compressor Serial No. ：
Temperature controller／Thermal display Model ：
Temperature controller／Thermal display Serial No. ：
Option Part Model ：
Optional Part Serial No. ：
4. Notes for repair and maintenance requests
We may decline your request for the repair or the maintenance of our products if
you refuse to give us information about the presence of the hazardous substance
and/or contaminant.
Also, please be aware that we do not accept liability for damages by the
contaminant, which might be caused during transportation to our office or the
nearest customer support center. To avoid such accident, please pay careful
attention to packing of the product
5．In case of breakdown and accident
When breakdown or accident occurs, we may ask for keeping the product on site
as it is or retrieving the product to investigate its cause. Also we may ask for
reporting the detailed process and/or the operating condition. When unidentified
malfunction was generated, please contact our Service Engineering Division or

F-4 ULVAC CRYOGENICS INCORPORATED
the nearest customer support center with reference to the chapter of Service
Network. We ask for cooperation about the above.
6．General Precautions
(1) It is strictly prohibited to duplicate, open, and transfer this instruction
manual or any of its parts to a third person without written permission from
ULVAC CRYOGENICS.
(2) Information in this document might be revised without a previous notice for
the specification change and the improvement of the product.
(3) If you have any questions or comments on this document, please do not
hesitate to contact us. The phone numbers of local customer support centers
are listed at the end of this manual.

MZ0F001E,2013OR03 ULVAC CRYOGENICS INCORPORATED F-5
Safety Considerations
Our products have been designed to provide extremely safe and dependable operation
when properly used. Following safety precautions must be observed during normal
operation and when servicing them.
CAUTION
WARNING
A warning describes safety hazards or unsafe practices
which could result in severe injury or loss of life.
Acaution describes safety hazards or unsafe practices which
could result in personal injury or equipment damage.
Toxic gas or chemicals used.
There is a risk of severe injury upon contact.
Corrosive chemicals used.
There is a risk of severe injury upon contact.
Flammable gas used.
There is a danger of fire or burn injury.
Explosive gas used.
There is a risk of fire or explosion.
Hazardous voltage .
Electric shock may cause severe injury or loss of life.
Hot heating part present.
There is a risk of burn injury.

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Heater Controller (STC-2A series) Instruction Manual
ULVAC CRYOGENICS INCORPORATED I
TABLE OF CONTENTS
Disposal Considerations....................................................................................................IW-1
1. Features and Types......................................................................................................... 1
1.1. Features ................................................................................................................... 1
1.2. Models...................................................................................................................... 2
2. Specifications .................................................................................................................. 3
3. Component Descriptions................................................................................................. 5
3.1. STC-2A .................................................................................................................... 5
3.2. STC-2A (INV 1kW)................................................................................................... 6
4. Connector Specifications and DIP Switch Specifications............................................... 7
4.1. Connector specifications.......................................................................................... 7
4.2. DIP switch specifications ....................................................................................... 10
5. Accessories and Optional Cables..................................................................................11
6. Installation ..................................................................................................................... 13
6.1. Installation site ....................................................................................................... 13
6.2. Installation .............................................................................................................. 13
7. Wiring ............................................................................................................................ 14
8. Operations..................................................................................................................... 20
9. Parameter Setting ......................................................................................................... 24
9.1. Parameter setting method ..................................................................................... 24
9.2. Factory default settings.......................................................................................... 25
10. Troubleshooting............................................................................................................. 27

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II ULVAC CRYOGENICS INCORPORATED
FIGURES
Figure 1-1 STC-2A series appearance ....................................................................... 1
Figure 1-2 Model designation of STC-2A series......................................................... 2
Figure 6-1 Panel cut dimensions and STC-2A installation ....................................... 13
Figure 7-1 STC-2A Optional cable wiring ................................................................. 17
Figure 7-2 STC-2A (INV 1kW) Optional cable wiring ............................................... 18
Figure 7-3 Wiring for I/F input and output signal ...................................................... 19
Figure 8-1 STC-2A series（without refrigerator negative rotation）operation ........ 22
Figure 8-2 STC-2A series（with refrigerator negative rotation function）operation 23
Appended Figure 1 STC-2A Dimensional drawing ................................................................... 29
2 STC-2A(INV 1kW) Dimensional drawing ................................................... 30
3STC-2A Electric wiring diagram ................................................................. 31
4 STC-2A (INV 1kW) Electric wiring diagram ............................................... 32
TABLES
Table 1-1 STC-2A series models............................................................................... 2
Table 3-1 Component descriptions（STC-2A）....................................................... 5
Table 3-2 Component descriptions（STC-2A(INV 1kW)）...................................... 6
Table 4-1 Connectable plug types and pin descriptions（STC-2A）....................... 7
Table 4-2 Connectable plugs and pins（STC-2A(INV 1kW)）................................. 8
Table 4-3 Descriptions of I/F connector pins............................................................. 9
Table 4-4 Descriptions of DIP switch....................................................................... 10
Table 5-1 STC-2A series accessories ......................................................................11
Table 5-2 Optional cables........................................................................................ 12
Table 8-1 Operations ............................................................................................... 20
Table 9-1 Factory default parameter settings（Standard setting mode）.............. 25
Table 9-2 Factory default parameter settings（Special setting mode）................ 25
Table 9-3 Guideline for relay ON/OFF count.............................................................. 26
Table 10-1 Troubleshooting （descriptions of error indications）........................... 27
Table 10-2 Troubleshooting（Other）...................................................................... 28

Heater Controller (STC-2A series) Instruction Manual
ULVAC CRYOGENICS INCORPORATED III
SHIPPING LIST
Our product has been fully inspected before shipment. However, please make sure
that there is no shortage of delivered items referring to the table below, no damage by
checking the external view of the product, and product name. STC-2A series has
product name on its front body. Be sure that the product you recived is exact
specifications of your order. Please inform us product name and serial number when
you inquire us about the product.
※1This conversion adapter will be provided if refrigerator of super trap is three-phase
motor. In this case, the conversion adapter will be shipped with connecting to the
main body of STC-2A series.
Inspection and Adjustment of STC-2A series
Please contact our technical service department
when inspection and/or adjustment of
STC-2A series are needed. No circuit or any other parts of this product may be changed
and/or adjusted in any shape or form in any circumstances. Note that the any inspection,
check, adjustment and repair caused by such change and/or adjustment will be only
accepted at your expense even if it is within the warranty period.
Item Quantity
Super trap heater controller STC-2A series 1
Input power cable (Refer to section 5, table 5-1) 1
Conversion adapter (Refer to section 5, table 5-1) ※11/each
Connector set (Refer to section 5, table 5-1) 1set
Optional cable set (Refer to section 5, table 5-2) 1set
Instruction Manual 1

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IV ULVAC CRYOGENICS INCORPORATED
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MZIW002E,2018JE01 ULVAC CRYOGENICS INCORPORATED IW-1
Disposal Considerations
Disposal of our products must be done in accordance with applicable national and local
laws and regulations.
We provide Safety Data Sheet (SDS) of our products upon your request.
Please contact us if necessary.
WARNING
The cryopumps or cryocoolers may contain residue of hazardous substances resulting
from actual use. Contact your safety supervisor and follow the instructions to remove
such toxic substances before disposing.

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Super Trap Heater Controller STC-2A series Instruction Manual
ULVAC CRYOGENICS INCORPORATED 1
1. Features and Types
1.1.Features
Super Trap Heater Controller STC-2A series is a device that measures and displays the surface
temperature of 80K Cryopanel through K Thermocouple which is mounted to UCI (ULVAC
CRYOGENICS INCORPORATED) CRYO-T Super Trap. Turning refrigerator power of the
compressor ON/OFF, STC-2A series can adjust the surface temperature of 80K Cryopanel within a
range of preset temperature.
In addition to the features above, connecting with the inner heater for room temperature quick
regeneration, STC-2A series can control the heater to keep the surface temperature being a room
temperature (290K) during regeneration.
The appearance of STC-2A series is shown in Figure 1-1 below.
STC-2A series has two different models: STC-2A and STC-2A (INV 1kW). Please refer to section 1.2
“Models” for the difference between them.
When you purchased a Super Trap which has the overheat protection sensor for the heater, the sensor
can be activated/deactivated by switching the DIP switch of the STC-2A series.
Figure 1-1 STC-2A series appearance

Super Trap Heater Controller STC-2A series Instruction Manual
2ULVAC CRYOGENICS INCORPORATED
1.2.Models
Figure 1-2 Model designation of STC-2A series
Table 1-1 STC-2A series models
Usage Types
Refrigerator power
control method Heater capacity
For general purpose STC-2A Relay control※1500W
For room temperature quick regeneration
STC-2A (INV 1kW) Inverter control※21000W
※1 Relay control method: The way to control refrigerator power line “ON/OFF” by relay with placing
STC-2A series between the compressor and the refrigerator.
※2Inverter control method: The way to control “Refrigerator ON Command” with the optional inverter
which is installed to the compressor.
STC-2A ( )
Usage
None= For general purpose
INV 1kW = For room temperature
quick regeneration

Super Trap Heater Controller STC-2A series Instruction Manual
ULVAC CRYOGENICS INCORPORATED 3
2. Specifications
○Dimensions .........................................240mm(W) x 100mm(H) x 300mm(D)
(See the external dimensions for the details)
○Weight ................................................ Approx.3.2kg
○Power Source......................................Single-phase 100VAC±10% 50Hz/60Hz
Circuit protector capacity：10A (15A)※1
Note: including Internal power consumption
○Internal Power Consumption .............. MAX．80W Note: excluding heater electrical power
○Operation Environment ...................... Ambient temperature：from -10°C to 40°C (No freezing)
Ambient humidity：Below 80%RH (No condensation)
Altitude：Below 1000m
○Input ................................................... TC-IN
K thermocouple input
REF-IN(INV ON/OFF)※1
Refrigerator power input：144 VA C - 240VAC (50 - 80Hz)
OH-IN
Sensor for overheat protection：K thermocouple
(Select use/not use with the DIP switch)
(Refer to section 4.2)
SYSTEM I/F
Photo coupler input（No-voltage contact input）： MAX 4mA
○Output................................................. HEATER
No.1 HEATER ：100VAC MAX 5A (10A)※1
No.2 HEATER ：100VAC MAX 5A (10A)※1
Total: MAX 5A (10A)
Note: including internal power consumption
SYSTEM I/F
Photo coupler output：MAX 8mA
REF-OUT
Relay output three-phase 144VA C - 240VAC MAX2A
(INV ON/OFF) ※1
24VDC MAX1A
※1( ) shows STC-2A(INV 1kW)

Super Trap Heater Controller STC-2A series Instruction Manual
4ULVAC CRYOGENICS INCORPORATED
TC-OUT
K thermocouple output (Not isolated from TC-IN.
To use TC-OUT make sure to isolate it from TC-IN. (See section 7)）
○Insulation resistance ............. 500VDC 20MΩor above
○Withstand voltage .................. 1000VAC/1min between power source terminal and earth terminal
500VAC/1min between I/O (input-output) terminal and earth terminal
○Display ................................. 4 digit 7segment display
Display range ：45K - 400K
Display accuracy：400K - 123K ±0.5%FS
123K - 73K ±3%FS
<73K Out of K thermocouple accuracy range
Note: excluding reference junction compensation accuracy
Reference junction compensation accuracy：±2.0℃（23℃± 5℃）
The range that can keep display accuracy ：23 ± 5℃
.
※1( ) shows STC-2A(INV 1kW)
CAUTION
●Do NOT heat the Super Trap exceeding 70℃(340K). It may damage the Super Trap.
●An alarm will sound from STC-2A series when the indicated temperature has
reached
330K. Cut off all power sources right after the alarm activation.

Super Trap Heater Controller STC-2A series Instruction Manual
ULVAC CRYOGENICS INCORPORATED 5
２
１
STC-2A
ＰＯＷＥＲ
RESET
ULVAC CRYOGENICS
ALARM
HEATER
COMP R
COMP F
READY
REF ON
HI-TEMP
REF OFF
R-T REGEN
ＥＮＴ
ＵＰ
ＤＮ
Ｋ
３３
４ ５ ６
3. Component Descriptions
3.1. STC-2A
Table 3-1 Component descriptions（STC-2A）
Name
Description
①POWER Lights up when powered ON(100VAC）.
②7-segment
display
Normal mode Displays the temperature of super trap panel.
Parameter setting mode It displays a set value (See section 9.1).
③LED
Status indicator
・R-T LEDs light up when photo coupler is output to I/F of the connector on the rear.
See section 8 (Figure 8-1) for operation and section 9.2 for initial set value.
・HI-TEMP
・
READY
・REF ON LED lights up when the refrigerator is ON.
・REF OFF
LED lights up when the refrigerator is OFF.
(Note that the LED will not light up when the compressor unit is stopped.
・REGEN LED lights up during regeneration (I/F input [REGEN] signal of STC-2A series is ON).
・HEATER
LED lights up when the heater is output (I/F input [REGEN] signal of STC-2A series is
ON).
・ALARM LED lights up when an alarm is activated. See section 10 “Troubleshooting” for
descriptions of error indications.
・
COMP F
LED lights up when the refrigerator operates in positive rotation.（Normally it is ON）
・COMP R LED lights up when the refrigerator operates in negative rotation.
（Note that it is only applicable to a model which has “negative rotation” function (Dip
SW①:OFF)）
④
[UP]/[DN]
Use for changing parameter value.
Refer to section 9.1 ”Parameter setting method“ for detail.
⑤ENT
⑥
RESET
Used for releasing alarm.

Super Trap Heater Controller STC-2A series Instruction Manual
6ULVAC CRYOGENICS INCORPORATED
3.2. STC-2A (INV 1kW)
Table 3-2 Component descriptions（STC-2A(INV 1kW)）
Name
Description
①POWER Lights up when powered ON(100VAC）.
②7-segment
display
Normal mode Displays the temperature of super trap panel.
Parameter setting mode It displays a set value (See section 9.1).
③
LED Status indicator
・R-T
LEDs light up when photo coupler is output to I/F of the connector on the rear.
See section 8 (Figure 8-1) for operation and section 9.2 for factory default settings.
・HI-TEMP
・READY
・REF ON The response varies depending on the type of the inverter to connect.
FR-E720 series: Lights at the temperature that the refrigerator unit is turned ON while
the compressor unit is in operation.
FR-D720series: Lights at the temperature unit is turned ON while the compressor unit
is in normal condition(*1).
・REF OFF
The response varies depending on the type of the inverter to connect.
FR-E720 series: Lights at the temperature that the refrigerator unit is turned OFF
while the compressor unit is in operation.
FR-D720series: Lights at the temperature unit is turned OFF while the compressor
unit is in normal condition(*1).
・REGEN LED lights up during regeneration (I/F input [REGEN] signal of the STC is ON).
・HEATER LED lights up when the heater is output (I/F input [REGEN] signal of the STC is ON).
・ALARM LED lights up when an alarm is activated. See section 10 “Troubleshooting” for
descriptions of error indications.
・COMP F LED lights up when the refrigerator operates in positive rotation.（Normally it is ON）
・COMP R LED lights up when the refrigerator operates in negative rotation.
(Note that this is only applicable when negative rotation is allowed (Dip SW
①
:OFF)
）
④
[UP]/[DN]
Use these buttons to change parameter values.
Refer to section 9.1 ”Parameter setting“ for detail.
⑤
ENT
⑥RESET Use this button to clear the alarm.
(*1) “Normal condition” refers to the state that the compressor unit is in operation and both the compressor
unit and the inverter have no alarm.