HS1C-K Interlock Switches with Solenoid and Hostage Key
Operator’s safety inside the hazardous area is ensured with the portable key.
Hostage control for large system or machine applications is achieved.

• The door and key are locked during machine operation.
• The door is unlocked by removing the key, and the interrup­
tion of load circuit and control circuit are maintained.
• Ideal as a portable key for bringing into the hazardous area.
• 10 different numbers are available for key, so that neighbor­ing switches cannot be operated by the same key.
• Flexible installation: The actuator can be inserted into two
directions.
• IP67 rated rugged die-cast aluminum housing.

Interlock Switch

Contact Ratings

Contact Configuration

Solenoid Unit
Location

Part No.

Main Circuit: 1NC+1NC
Auxiliary Circuit: 1NC+1NC

2

+
–

Right

HS1C-K244R-➁-

Solnoid
Power

4

6

Rated Voltage (Ue)Main
Circuit3

5

Rated Thermal Current (Ith)MonitorCircuit

1

300V (between LED or
solenoid and ground:
60V)
Main circuit: 10A
Auxiliary circuit: 3A
30V
125V 250V

Rated Insulation Voltage (Ui)Contacts are linked to thesolenoid mechanically.

Indicator
7 +Auxiliary
Circuit

AC
DC
AC
DC

Resistive load (AC-12)

10A

10A

6A

Inductive Load (AC-15)

10A

5A

3A

Resistive load (DC-12)

6A

—

—

Inductive Load (DC-13)

3A

0.9A

—

Resistive load (AC-12)

—

3A

3A

Inductive Load (AC-15)

—

—

3A

Resistive load (DC-12)

3A

—

—

Inductive Load (DC-13)

—

0.9A

—

• Minimum applicable load (reference value): 3V AC/DC, 5 mA
Note: Ratings approved by safety agencies: A300: AC-15 3A/250V

8 –• The contact configurations show the contact status when the actuator isinserted and locked.
• The HS9Z-T1 special key wrench for removing the cover and manual
unlocking is supplied with the interlock switch.
• Specify an indicator color in place of ➁ in the Part No.
G: green, R: red• Specify a key number in place of .
• Actuators are not supplied with the interlock switch, and must be orderedseparately.

Actuators/Key Wrench/Screwdriver for TORX Screws
Description

Rated
Current(Ie)(Note)

Main
CircuitPart No.

Solenoid Unit
Rated Voltage

24V DC (100% duty cycle)

Rated Current

305 mA

Coil Resistance79Ω (at 20°C)
Rated voltage × 85% maximum (at 20°C)

Pickup Voltage
Dropout Voltage
Maximum Continuous
Applicable Voltage
Maximum Continuous
Applicable Time
Insulation Class

Rated voltage × 10% minimum (at 20°C)
Rated voltage × 110%
Continuous
Class B

Straight Actuator

HS9Z-A1

Right-angle Actuator

HS9Z-A2

Angle Adjustable Actuator(mainly for hinged doors)

Indicator

HS9Z-A3

Rated Voltage

24V DCSpecial Key Wrench for TORX

HS9Z-T1

Rated Current

10 mA

Light Source

LED

Light Color

G (green), R (red)Part No. Development• The lens cannot be replaced.

HS1C-K244R-GCircuit Diagram No.
Main Circuit Auxiliary Circuit2:
1NC+1NC
1NC+1NC
Solenoid Rated Voltage
4: 24V DC
Indicator Rated Voltage
4: 24V DC

Key No.: T001 to T010
(10 types)
Indicator Color
G: Green, R: Red
Housing Color
R: Red only1

HS1C-K Interlock Switches with Solenoid and Hostage Key
Specifications

Dimensions

ISO14119
IEC60947-5-1
EN60947-5-1 (TÜV approved)
GS-ET-19 (TÜV approved)
Applicable Standards UL508 (UL listed)
CSA C22.2 No.14 (c-UL listed)
GB/T14048.5 (CCC approved)
IEC 60204-1/EN 60204-1 (applicable standards for use)

HS1C-K when using the Straight Actuator (HS9Z-A1)–40 to +80°C (no freezing)

Pollution Degree3

Impulse Withstand
Voltage

4 kV (between LED, solenoid and ground: 2.5 kV)

Insulation Resistance(500V DC megger)

Between live and dead metal parts: 100 MΩ minimum
Between live metal part and ground: 100 MΩ minimum
Between live metal parts:
100 MΩ minimum
Between terminals of the same pole: 100 MΩ minimum

44

IP67 (IEC 60529)

Shock Resistance

Damage limits: 1000 m/s2

Vibration ResistanceOperating extremes:
10 to 55 Hz, amplitude 0.5 mm minimum
Damage limits: 30 Hz, amplitude 1.5 mm minimum

Actuator Operating
Speed

0.05 to 1.0 m/s

4

45
49.5

HS9Z-A1
Actuator
2-M6
Actuator Mounting Holes2298.5 ±16.5 ±1

40

54.3
4Class I (IEC 61140)

Degree of Protection

7.5

68.8
2

31.2

Slot Plug(Note)

5.5

Electric Shock
Protection

HS1C-K when using the Right-angle Actuator
75(HS9Z-A2)

Direct Opening Travel 11 mm minimum
Direct Opening Force

20N minimum

Actuator Retention
Force

1500N minimum (GS-ET-19)

Operating Frequency

900 operations per hour

Mechanical Life

Conditional
Short-circuit Current

1,000,000 operations minimum (GS-ET-19)
100,000 operations minimum (operating frequency 900
operations per hour, load AC-12, 250V, 6A)
1,000,000 operations minimum (operating frequency 900
operations per hour, load 24V AC/DC, 100mA)
100A (250V) (Use 250V/10A fast-blow fuse for short-cir­
cuit protection.)

Weight (approx.)

660g

44

(Vertical Mounting)

4-M5
Interlock Switch
Mounting Holes

61

19.5 ±1

Electrical Life

47

125

45 to 85% (no condensation)

Storage Temperature42

23.5 26

Relative Humidity

74

35

1.5

–20 to 40°C (no freezing)

106

40

36.5
10

OperatingTemperature(Horizontal Mounting)17.5 ±1*

HS9Z-A2
Actuator

22

46.5*

40

26

Mounting Hole Layout

23.5

Slot Plug(Note)* Actuator center position

4-M5 Screws

42

Note: Plug the unused actua­tor entry
slot using the slot plug suppliedwith the interlock switch.
• Use four mounting screws to mountthe interlock switch according to themounting hole layout.

47

Actuator Dimensions

Actuator
Actuator Cover Mounting
(red)
Holes

R3

.2

Actuator Cover(red) (Note)

44
58
72
.2

20

R3

2
Door Hinge

Angle Adjustment Screw(M3 hexagon socket head screw)30

2-M6 Screws
Actuator
Mounting
Holes

2

°

90

33 max.
12
(21)
1

2
4.1

4.1

5

2

18

Stopper Film
(Note)

58

41.5
10.5
1

7.4

29.2

22

2-M6
Screws

29.2
43

20
11

49.3

Angle-adjustable Actuator HS9Z-A3

20°

7.4

18.3
1

22

.2

40
22

22

Actuator
Mounting
Holes

R3

29.2
43

9
2-M6
ScrewsRight-angle Actuator HS9Z-A2

40

Straight Actuator HS9Z-A1

Note: The actuator cover and actuator stop films are supplied with the actuator and used when adjusting the actuator position.
Remove the actuator cover and actuator stop film after the actuator position is determined.

2

HS1C-K Interlock Switches with Solenoid and Hostage Key
Circuit Diagrams and Operating Characteristics
Status 1
Interlock • Door closed
Switch• Key is installed
Status• Solenoid
de-energized

Status 2• Door closed• Key is installed• Solenoid
energized

Status 3• Door closed• Key is removed• Solenoid
energized

Contact Block 1

Contact Block 1

Status 4• Door open
• Key is removed• Solenoid
energized

Status 5• Door open
• Key is removed• Solenoid
de-energized

Status 6• Door closed• Key is removed• Solenoid
de-energizedContact block 2 is OFF
with energized solenoid

Main
3-4: Closed
Circuit
Monitor
1-2: Closed
Circuit
Solenoid
5-6: Power OFF
Power• Door locked• Key is retained
Remarks(does not turn)• Machine canoper­ate

Contact block 2 is OFF
with energized solenoid

Contact block 2 is OFF
with key removed

MonitorCircuit
Solenoid
Power

Main
Circuit

Main
Circuit
SolenoidPower

Contact Block 2

Contact Block 2

MonitorCircuit

MonitorCircuit
Solenoid
Power

SolenoidPower
Contact block 2 is OFF
with energized solenoid

Contact Block 1

Contact Block 1

Main
CircuitContact Block 2

MonitorCircuitContact Block 1

Main
Circuit

Main
Circuit
SolenoidPower

Contact Block 2

MonitorCircuitContact Block 2

Main
Circuit
SolenoidPower

Circuit
DiagramContact Block 2

Contact Block 1

MonitorCircuit

Door

Contact block 2 is OFF
with key removed

3-4: Open

3-4: Open

3-4: Open

3-4: Open

3-4: Open

1-2: Open

1-2: Open

1-2: Open

1-2: Open

1-2: Open

5-6: Power OFF

5-6: Power ON

5-6: Power ON

5-6: Power OFF

5-6: Power OFF• Door locked• Key can be removed
by turning• Machine cannot
operate• Door can be
opened by hand
• Machine cannot
operate• Machine cannot
operate• Machine cannot
operate• Door can be
opened by hand
• Machine cannot
operate• Main circuit: Connected to the machine drive control circuit, sending interlock signals to the protective door.
• Monitor circuit: Sends ON/OFF signals of the main circuit and monitoring signals of open/closed status of the protective door.

Safety Precautions• In order to avoid electric shock or fire, turn power off before
instal­lation, removal, wire connection, maintenance, or inspec­tion of the interlock switch.
• If relays are used in the circuit between the interlock switch
and the load, consider the danger and use safety relays, sincewelded or sticking contacts of standard relays may invalidate thefunctions of the interlock switch. Perform risk assessment andestablish a safety circuit which satisfies the requirement of thesafety cate­gory.
• Do not place a PLC in the circuit between the interlock switch
and the load. Safety security can be endangered in the event ofa mal­function of the PLC.
• Do not disassemble or modify the interlock switch, otherwise amalfunction or an accident may occur.
• Do not install the actuator in the location where the human bodymay come into contact. Otherwise injury may occur.

Instructions• Regardless of door types, do not use the interlock switch as adoor stop. Install a mechanical door stop at the end of the door
to protect the interlock switch against excessive force.
• Do not apply excessive force to the locked key. Applying force
to the key may interfere with solenoid operation, resulting in a
failure to unlock. Also, applying a torque larger than 1.8 N·m tothe key results in damage.
• Regardless of the door status, the key is locked when the key isoperated while the solenoid is de-energized.
• Do not apply excessive shock to the interlock switch when open­
ing or closing the door. A shock to the interlock switch exceed­ing 1,000 m/s2 may cause damage to the interlock switch.
• When wiring, unscrew the cover with part number label only. Un­
necessary loosening of other screws may cause a malfunction of
the interlock switch.
• Prevent foreign objects such as dust and liquids from entering
the interlock switch while connecting a conduit or wiring.
• Actuator retention force is 1500N (static load). When larger force
is expected, add a system using interlock switch without lock(ex. HS1B) and sensor in order to detect door opening and tostop the machine.
• If the operating atmosphere is contaminated, use a protective

cover to prevent the entry of foreign objects into the interlock
switch through the actuator entry slots.
• Entry of a considerable amount of foreign objects into the inter­lock switch may affect the mechanism of the interlock switch
and cause a malfunction.
• Plug the unused actuator entry slot using the slot plug suppliedwith the interlock switch.
• Do not store the interlock switches in a dusty, humid, or organicgas atmosphere.
• Use dedicated actuators only. When other actuators are used,
the interlock switch may be damaged.
• Do not modify the actuator, otherwise it will damage the interlock
switch.
• The cover uses special screws which cannot be removed ortight­ened by general drivers. Use the special wrench suppliedwith the interlock switch.
• Regardless of door types, do not use the interlock switch as adoor lock. Install a separate lock using a latch or other mea­sures.
• The solenoid has polarity. Make sure of the correct polarity whenwiring. Do not apply overvoltage, otherwise the solenoid will beburnt.

3

HS1C-K Interlock Switches with Solenoid and Hostage Key
Minimum Radius of Hinged Door

• When using the interlock switch for a hinged door, refer to theminimum radius of doors shown below. For the doors with small
minimum radius, use angle adjustable actuators (HS9Z-A3).
Note: Because deviation or dislocation of hinged door may occur
in actual applications, make sure of the correct operation
before installation.

HS9Z-A2 Actuator• When the door hinge is on the extension line of the interlock switch
surface:Manual Unlocking

The HS1C-K allows manual unlocking of the actuator to pre­checkproper entry of the actuator into the slot as well as for emergency
use such as a power failure.
• Remove the screw located on the front of the interlock switch
using the special wrench supplied with the interlock switch.
Insert a small screwdriver into the screw hole and push the leverinside of the interlock switch away from the key until the key isunlocked (see the figure below).
• Turn the key to unlock the actuator.
Unlocking Screw

Lid

s
adiu
mR m
imu
Min 230 m

s
adiu
mR
m
imu
Min 130 m

L­shaped Wrench(supplied)Part No. HS9Z­T1

Screwdriver

Door Hinge• When the door hinge is on the extension line of the actuator
mounting surface:HS9Z-A2 Actuator

Actuator Entry Slot (2 slots)

Lever

adiu
mR m
imu
Min 400 m

Min

Note: Before manually unlocking the interlock switch, make sure thatthe machine has come to a complete stop. Manual unlocking
during operation may unlock the interlock switch before themachine stops, and the function of interlock switch withsolenoid is lost. After unlocking, ensure to install the screw.
Terminal Nos. 7, 8

s

s
adiu
mR
imu 0 mm
24

Applicable Crimping Terminal

Door Hinge

Ground Terminal: E

3.6 min.

3.5 max.

3.5 min.

3.8 max.

ø3.6 min.

HS9Z­A3 Actuatorø4.1 min.

7.6 max.

• When the door hinge is on the extension line of the interlock switch
surface: 50 mm• When the door hinge is on the extension line of the actuator
mounting surface: 80 mm

6.9 max.

HS9Z-A3 Actuator• Use an insulation tube on the crimping terminal.
M

in

in

im
u
50 m R
m ad
m iu

s

im
u
80 m
m Rad
m iu

Wire

s

Applicable
Crimping
Terminal

Approx.
4 mm

Insulation
Tube

Actuator Angle Adjustment• Using the angle adjustment screw, the actuator angle can be
adjusted (refer to the dimensional drawing). Adjustable angle: 0 to 20°• The larger the adjusted angle of the actuator, the smaller the applica­
ble radius of the door opening.
• After installing the actuator, open the door. Then adjust the actuatorso that its edge can be inserted properly into the actuator entry slotof the interlock switch.
• Recommended tightening torque of angle adjustment screw: 0.8 N·m• After adjusting the actuator angle, apply Loctite to the adjustment
screw so that the screw will not loosen.

Mounting Examples• Mount the interlock switch on a fixed machine or guard, and mountthe actuator on the hinged door. Do not mount both interlock switch
and actuator on the hinged doors, otherwise malfunction will occur.
Application on Sliding DoorsDoor
HS1C-KInterlock Switch

Terminal No. 1 to 6
• Direct wiring using either solid or stranded wires.
• When using stranded wires, make sure that loose wires
do not cause short circuit. Also, do not solder the termi­
nal to prevent loose wires.
When using Ferrules
Compatible
0.75 mm2
1.0 mm2
1.5 mm2

AWG
18
17
16

Part No.
S3TL-H075-14WW
S3TL-H10-14WY
S3TL-H15-14WR• Recommendation tools (sold separately)
Name
Crimping toolPart No.
S3TL-CR06D

Applicable Wire Size

HS9Z-A1
Actuator• Terminal Nos. 1, 2, 5, 6, 7, 8: 0.5 to 0.75 mm2• Terminal Nos. 3, 4, E:
1.0 to 1.25 mm2

Latch

Applicable Cable Glands

Door Stop

Application on Hinged Doors• Use IP67 cable gland.
G1/2

Door

Latch

HS9Z-A2
Actuator
HS1C-KInterlock Switch

4

Note
Overseas limited sale

30 mm
max.

M

9 mm max.

HS9Z-A1
Actuator

Refer to the instruction sheet from the URL below forrecommended cable glands.
https://apac.idec.com/idec-apac/en/SGD/c/HS1C_K_Series

HS1C-K Interlock Switches with Solenoid and Hostage Key
Instructions
Recommended Tightening Torque of Mounting
Screws• Interlock switch: 4.5 to 5.5 N·m (four M5 screws)• Terminal screws for terminal No. 1 to 6: 0.4 to 0.6 N·m (M3)
• Terminal screws for terminal No. 7 and 8: 0.9 to 1.1 N·m (M3.5)• Actuator (HS9Z-A1/A2/A3): 4.5 to 5.5 N·m (two M6 screws)• Mounting bolts must be provided by users.
• The above recommended tightening torques of the mounting
screws are the values confirmed with hex socket head bolts.
When other screws are used and tightened to a smaller torque,
make sure that the screws do not come loose after mounting.
• To avoid unauthorized or unintended removal of the interlock
switch and the actuator, it is recommended that the interlock
switch and the actuator are installed in an unremovable manner,for example using special screws, rivets, or welding the screws.

Cable Lead-in Length and Wiring
Examples
➁

1

30±2

45±2

2

30±2

50±2

3

25±2

55±2

4

25±2

60±2

5

30±2

65±2

6

30±2

70±2

7

65±2

35±2

8

65±2

110±2

E

85±2

Wire Stripping Length L2 (mm)GlandInterlock Switch

L1

Cable Length
L1 (mm)Conduit Port

➀

45±2
7±1

Note: Wire the interlock switches according
to the following examples.
When using Conduit Port ➀L2

Terminal No.

When using Conduit Port ➁Note: When wiring the ground (E) terminal, connect in thesolid line direction only. Do not connect in thedotted line direction.

EP5556A HS1C-K August 2023

5

Ordering Terms and Conditions
Thank you for using IDEC Products.
By purchasing products listed in our catalogs, datasheets, and the like (hereinafter referred to as “Catalogs”) you agree to be bound by these terms and conditions. Please readand agree to the terms and conditions before placing your order.

1. Notes on contents of Catalogs

3. Inspections(1) Rated values, performance values, and specification values of IDEC products
listed in this Catalog are values acquired under respective conditions in
independent testing, and do not guarantee values gained in combined
conditions.
Also, durability varies depending on the usage environment and usage
conditions.
(2) Reference data and reference values listed in Catalogs are for reference
purposes only, and do not guarantee that the product will always operate
appropriately in that range.
(3) The specifications / appearance and accessories of IDEC products listed in
Catalogs are subject to change or termination of sales without notice, for
improvement or other reasons.
(4) The content of Catalogs is subject to change without notice.

2. Note on applications(1) If using IDEC products in combination with other products, confirm theapplicable laws / regulations and standards.
Also, confirm that IDEC products are compatible with your systems, machines,
devices, and the like by using under the actual conditions. IDEC shall bear no
liability whatsoever regarding the compatibility with IDEC products.
(2) The usage examples and application examples listed in Catalogs are forreference purposes only. Therefore, when introducing a product, confirm theperformance and safety of the instruments, devices, and the like before use.
Furthermore, regarding these examples, IDEC does not grant license to use
IDEC products to you, and IDEC offers no warranties regarding the ownershipof intellectual property rights or non-infringement upon the intellectual
property rights of third parties.
(3) When using IDEC products, be cautious when implementing the following.
i. Use of IDEC products with sufficient allowance for rating and 		
performanceii.	Safety design, including redundant design and malfunction prevention
design that prevents other danger and damage even in the event that an
IDEC product failsiii.	Wiring and installation that ensures the IDEC product used in yoursystem, machine, device, or the like can perform and function according
to its specifications(4) Continuing to use an IDEC product even after the performance has
deteriorated can result in abnormal heat, smoke, fires, and the like due toinsulation deterioration or the like. Perform periodic maintenance for IDEC
products and the systems, machines, devices, and the like in which they areused.
(5) IDEC products are developed and manufactured as general-purpose products
for general industrial products. They are not intended for use in the following
applications, and in the event that you use an IDEC product for theseapplications, unless otherwise agreed upon between you and IDEC, IDEC shallprovide no guarantees whatsoever regarding IDEC products.
i.	Use in applications that require a high degree of safety, including nuclear
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any other equipment, instruments, or the like that could endanger life or
human healthii.	Use in applications that require a high degree of reliability, such asprovision systems for gas / waterworks / electricity, etc., systems that
operate continuously for 24 hours, and settlement systems
iii.	Use in applications where the product may be handled or used deviatingfrom the specifications or conditions / environment listed in the Catalogs,
such as equipment used outdoors or applications in environments
subject to chemical pollution or electromagnetic interference
If you would like to use IDEC products in the above applications, be sure
to consult with an IDEC sales representative.

Head Office
USA
EMEA

We ask that you implement inspections for IDEC products you purchase without
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handling of the product before and during the inspection.

4. Warranty(1) Warranty period
The warranty period for IDEC products shall be one (1) year after purchase ordelivery to the specified location. However, this shall not apply in cases where
there is a different specification in the Catalogs or there is another agreementin place between you and IDEC.
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Should a failure occur in an IDEC product during the above warranty period
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reasons shall be deemed outside the scope of this warranty.
i. The product was handled or used deviating from the conditions / 		environment listed in the Catalogs
ii. The failure was caused by reasons other than an IDEC productiii. Modification or repair was performed by a party other than IDEC
iv. The failure was caused by a software program of a party other than 		IDEC
v. The product was used outside of its original purposevi.	Replacement of maintenance parts, installation of accessories, or the like
was not performed properly in accordance with the user’s manual and
Catalogs
vii. The failure could not have been predicted with the scientific and 		technical standards at the time when the product was shipped from 		
IDEC
viii.	The failure was due to other causes not attributable to IDEC (including
cases of force majeure such as natural disasters and other disasters)
Furthermore, the warranty described here refers to a warranty on the IDEC
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The warranty listed in this Agreement is the full and complete warranty for IDEC
products, and IDEC shall bear no liability whatsoever regarding special damages,
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The prices of IDEC products do not include the cost of services, such as dispatching
technicians. Therefore, separate fees are required in the following cases.
(1) Instructions for installation / adjustment and accompaniment at test operation(including creating application software and testing operation, etc.)(2) Maintenance inspections, adjustments, and repairs(3) Technical instructions and technical training(4) Product tests or inspections specified by you
The above content assumes transactions and usage within your region. Please
consult with an IDEC sales representative regarding transactions and usage outsideof your region. Also, IDEC provides no guarantees whatsoever regarding IDEC
products sold outside your region.

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