HS1P

HS1P Interlock Plug Unit
Interlock plugs for controlling the safety in production areas.

••Ideal as a portable key for bringing into the hazardous area, orfor detecting open/closed door status by chaining with a guarded
door (chain must be provided by the user).
••Removing the interlock plug maintains the interrupted status ofload circuit and control circuit.
••Bayonet-style plug removal/installation ensures stability.
••Prevents intentional short-circuit with a wire on metal chip.
(Double-break internal contacts achieve high safety.)••Solenoid type and non-solenoid type available.
••Solenoid type has a lock mechanism. Lock mechanism prevents
removal of interlock plug during machine operation, and allows
for removal after the machine has stopped, with solenoid energi­
zation signal.
••Manual unlocking is possible in the event of power failure or
maintenance using a special tool (solenoid type only).
••Rugged die-cast aluminum housing••UL listed, c-UL listed.

Interlock Plug Unit
Solenoid

Specifications

No. of Indicators
2
11—

With solenoid (24V DC)
Without solenoid

Part No.
HS1P-441-➁➁
HS1P-341-➁
HS1P-241-➁
HS1P-11–20 to +50°C (no freezing)

Relative Humidity

45 to 85% (no condensation)

Storage Temperature–40 to +80°C (no freezing)

Pollution Degree

3

Insulation Resistance

100 MΩ minimum 500V DC megger

Contact Resistance

300 mΩ maximum (initial value at cable length 1m)

Dielectric Strength

Between live and dead metal parts: 2000V, 1 minuteBetween terminals of the same pole: 1000V, 1 minuteShock 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

Operating Frequency

900 operations per hour

Mechanical Life

30,000 operations minimum—Interlock PlugStrength

Rotational strength when locked: 5 N·m

Mounting Screw

M5 × 4Weight (approx.)

560g (HS1P-441-➁➁)800g (HS1P-443-➁➁)Ratings
Main Circuit

Rated Operating
Current (Ie)

HS1P-441

HS1P-341

HS1P-241

HS1P-11

30V

250V

30V

250V

5A

10A
(at 24V DC)

10A

5A(at 24V DC)
30V

250V

—

5A

5A

—

—

24V DC

250V

—

—

5A
(resistiveload)

5A (240V
AC, 30V DC)(resistive load)——

Solenoid Unit
Rated Voltage
Rated Current

24V DC (100% duty cycle)
260 mA

Coil Resistance95Ω (at 20°C)
Rated voltage × 90% maximum (at 20°C)
Rated voltage × 10% minimum (at 20°C)

Pickup Voltage
Dropout Voltage
Maximum Continuous
Applicable Voltage
Maximum Continuous
Applicable TimePower Consumption

Rated voltage × 110%

EN 1088 (applicable standards for use)
OperatingTemperature• Specify an indicator color code in place of ➁ in the Part No.
G: green, R: red• Plug alone cannot be sold.
• Key wrench for TORX screws (HS9Z-T1) is supplied with the interlockswitch.
• Cable length is 1m. 3m is also available upon request.

Model
Rated Insulation
Voltage (Ui)PlugContact Rated Thermal
Current (Ith)Rated Insulation
Voltage (Ui)Rated Thermal
Current (Ith)Micro
Switch Rated Operating
Voltage (Ue)Applicable Standards

UL508 (UL listed)
CSA C22.2, No. 14 (c-UL listed)
UL498
CSA C22.2 No. 182.1

Part No. Development
HS1P-441-RG
PL2 Indicator Color
G: Green, R: Red
Solenoid (indicator)
4: With (two indicators)
3: With (one indicator)
2: Without (one indicator)
1: Without (without indicator)

PL1 Indicator Color
G: Green, R: Red
Cable Length
1: 1m
3: 3mIndicator Rated Voltage
4:24V DC
Blank: Without indicator

Continuous
6.3W

Indicator
Rated Voltage
Rated Current
Light Source
Lens Color

24V DC
10 mA
LED
G (green), R (red)• The lens cannot be replaced.

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HS1P Interlock Plug Unit
Dimensions
Cable Size

HS1P

• HS1P-4: VCTF 0.75 mm2 (6-pin), Sheath outside diameter ø8.9 mm• HS1P-3: VCTF 0.75mm2 (5-pin), Sheath outside diameter ø8.9 mm• HS1P-2: VCTF 1.25mm2 (4-pin), Sheath outside diameter ø8.5 mm• HS1P-1: VCTF 1.25mm2 (3-pin), Sheath outside diameter ø7.8 mm

Cable Length: 1m, 3m49
4427

PL150

PL212126

Mounting Hole Layout
M54-45267375

48353648
605976
109

Circuit Diagrams and Operating Characteristics
With Solenoid (HS1P-4)
Interlock plug isInterlock plug isinstalled
removedSolenoid is
Solenoid isenergizedenergized

Interlock Interlock plug is
Plug Unit installed
StatusSolenoid isde-energizedWithout Solenoid (HS1P-2)
Interlock plug isInterlock plug isinstalledinstalled

Interlock plug isremovedSolenoid isde-energized——Door

GroundMicro switch turns off whensolenoid is energized.

GroundMicro switch turns off whensolenoid is energized.

To power –GroundTomachine+To power –Ground

GroundMicro switch maintaines off as
the interlock plug is removed.

HS1P-3 does not have PL1.

HS1P-1 does not have PL.
Main circuit: Black and Red
Ground:White

Main
CircuitWhite - Yellow:
ClosedWhite - Yellow:
Open

White - Yellow:
Open

White - Yellow:
Open

White - Red: Closed

White - Red:
Open

Indicator(Note)

PL1: ON
PL2: OFF

PL1: OFF
PL2: ON

PL1: OFF
PL2: ON

PL1: OFF
PL2: OFFONOFFSolenoid
PowerRed - Black:
Power OFFRed - Black:
Power ON

Red - Black:
Power ON

Red - Black:
Power OFFRemarks• Interlock plug isretained (cannotturn)• Machine canoperate• Interlock plugcan be removed
by turning• Machine cannot
operate• Interlock plug isremoved• Machine cannot
operate• Interlock plug isremoved• Machine cannot
operate

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Main Circuit

Red

PL

To
power +

Green Black WhiteTo power –PLTomachine+Main Circuit

Main CircuitTomachine+Red

PL2

Interlock PlugTo
power +

Green Black WhiteTo power –PL1

To
power +

Solenoid Power

Main CircuitTomachine+Red Brown Yellow White

PL2

To
power +

Solenoid PowerTo power –Red Brown Yellow White

Main Circuit

PL1

Green Black

GroundTomachine+Solenoid Power

PL2

Red Brown Yellow WhiteTo power –PL1

To
power +

Interlock PlugInterlock PlugInterlock Plug

Green Black

Main CircuitTomachine+Solenoid Power

PL2

Red Brown Yellow White

Circuit
Diagram

Green Black

PL1

To
power +

Green Black

Interlock PlugInterlock Plug——• Interlock plugcan be removed
by turning• Machine canoperate• Interlock plug isremoved• Machine cannot
operate

HS1P

HS1P Interlock Plug UnitSafety Precautions••Do not install the interlock plug unit in places subject to oilor water. Electric shocks or fire hazard may be caused if theinterlock plug is operated when the plug part is contaminatedwith oil or water.
••Interlock plug units are used to ensure the safety of operators
who carry the plugs. Provide only one plug to a guard. Other­wise the hostage control function is lost, endangering theoperators. Ensure complete safety management so that thefunction is maintained.

••In order to avoid electric shocks or fire, turn power off before installation, removal, wire connection, maintenance, orinspec­tion of the interlock plug unit.
••Do not disassemble or modify the interlock plug unit. Also do
not disable the function of interlock plug unit intentionally. Oth­erwise a malfunction or an accident may occur.

Instructions••The plug of HS1P interlock plug units resemble the plug ofHS2P interlock plug units, however, these plugs are not inter­changeable. Do not use the plugs of other types, otherwise
the interlock plug units will be damaged. The plugs can be
distin­guished with the handlet color.

HS1P: blackHS2P: aluminum color••When chaining a interlock plug unit with the door, give aproper slack to the chain and do not apply excessive force tothe plug. PL2 shows solenoid power ON. If excessive force isapplied to the plug, especially to the direction of removing theplug, solenoid operation failure may occur even though thesolenoid is energized, resulting in unlocking failure.
••The solenoid has polarity. Make sure of the correct polarity
when wiring. Do not apply overvoltage, otherwise the solenoid
will be burnt.
••Do not store the interlock plug units in a dusty, humid, ororganic-gas atmosphere. Also avoid direct sunlight.
••The HS1P allows manual unlocking of the plug to precheckproper installation as well as for emergency use such as apower failure.
1.	 Remove the screw located on the front of the interlock plug unit
using the special wrench supplied with the unit. Insert a small
screwdriver into the screw hole and push the lever inside asshown below until the key is unlocked.
2.	Turn and remove the plug.
3.	After unlocking, ensure to install the screw.
Interlock Plug Unit

• Make sure that the interlock plug unit is not energized when removing or installing the plug (after operating the emergency stop
button shown in the circuit example shown below). Do not start orstop the machine by plug removal/installation, otherwise the inter­lock plug unit may fail.
[Interlock Plug Circuit Example]+R

Secure the interlock plug unit using four M5 hex socket headbolts.

[Example] When installing the door using a chain
1.	Secure the interlock plug unit on the machine using four M5hex socket head bolts.
2.	Secure the chain on the plug handle and the door.
3.	Do not use a chain which is unnecessarily long, so that thedoor does not open wide with the plug installed.
Interlock Plug Unit

PlugHandle

Chain
DoorRecommended Tightening Torque ofMounting Screws

Screwdriver

Start

Installing the Interlock Plug Units••Interlock plug unit: 4.5 to 5.5 N·m (four M5 screws)••Mounting bolts must be supplied by the user.
••The above recommended tightening torques of the mounting screws are the values with hex socket head bolts.
When other screws are used and tightened to a smaller
torque, make sure that the screws do not become looseafter mounting.
••To avoid unauthorized or unintended removal of the interlock plug unit and the actuator, it is recommended that theinterlock switch and the actuator are installed in an unremovable manner, for example using special screws, rivets,or welding the screws.

R

StopEmergency Stop Switch
Interlock PlugR•–

L

Load

Note: When using themain circuit on AC(HS1P-1, HS1P-34),
connect the emergency
stop switch to Line, andthe interlock plug unit toNeutral.

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