Schmersal AZM 161CC-12/12KA-024 Solenoid Interlock: Operation and Installation Guide

1 About this document

This document provides all the information needed for the mounting, set-up, and commissioning to ensure the safe operation and disassembly of the switchgear. The operating instructions must be kept in a legible and accessible condition.

1.1 Function

The solenoid interlock is designed to prevent the opening of movable safety guards in conjunction with the control part of a machine before hazardous conditions have been eliminated.

1.2 Target group of the operating instructions: authorised qualified personnel

All operations described in this manual must be carried out by trained specialist personnel authorized by the plant operator. Users must read and understand these instructions and be aware of all applicable legislation regarding occupational safety and accident prevention before installation and operation.

1.3 Explanation of the symbols used

• i Information, hint, note: Used for identifying useful additional information.
• ! Caution: Failure to comply with this warning notice could lead to failures or malfunctions.
• ! Warning: Failure to comply with this warning notice could lead to physical injury and/or damage to the machine.

1.4 Appropriate use

The Schmersal product range is not intended for private consumers. These products are developed for safety-related functions as part of an entire plant or machine. The manufacturer of the machine or plant is responsible for ensuring the correct functionality of the entire machine or plant. The safety switchgear must be used exclusively in accordance with the versions listed or for applications authorized by the manufacturer.

1.5 General safety instructions

Users must observe the safety instructions in this manual, country-specific installation standards, and all prevailing safety regulations and accident prevention rules. Further technical information can be found in Schmersal catalogues or the online catalogue at products.schmersal.com.

2 Product description

2.1 Ordering code

The ordering code for the AZM 161 series follows the pattern: AZM161-(1)-(2)(3)K(4)-(5)/(6)-(7)(8)

2.2 Special versions

For special versions not listed in the ordering code, specifications apply accordingly, provided they correspond to the standard version.

2.3 Purpose

The solenoid interlock has been designed to prevent, in conjunction with the control part of a machine, movable safety guards from being opened before hazardous conditions have been eliminated.

! Interlocks with power to lock principle may only be used in special cases after a thorough evaluation of the accident risk, since the safety guard can be opened immediately on failure of the power supply or upon activation of the main switch.

The safety switchgears are classified according to EN ISO 14119 as type 2 interlocking devices.

The user must evaluate and design the safety chain in accordance with the relevant standards and the required safety level.

! The entire concept of the control system, in which the safety component is integrated, must be validated to the relevant standards.

2.4 Warning about misuse

! In case of improper use or manipulation of the safety switchgear, personal hazards or damages to machinery or plant components cannot be excluded. There are no residual risks, provided that the safety instructions as well as the instructions regarding mounting, commissioning, operation and maintenance are observed.

2.5 Exclusion of liability

Schmersal accepts no liability for damages and malfunctions resulting from defective mounting or failure to comply with the operating instructions manual. The manufacturer accepts no liability for damages resulting from the use of unauthorized spare parts or accessories.

For safety reasons, invasive work on the device as well as arbitrary repairs, conversions, and modifications to the device are strictly forbidden. Schmersal accepts no liability for damages resulting from such invasive work, arbitrary repairs, conversions, and/or modifications to the device.

2.6 Technical Data

Certifications and Standards

General Data - Product Characteristics

Safety Evaluation

Safety Evaluation - Troubleshooting

Note: Performance Level and Category are determined by the application.

Mechanical Parameters

Mechanical Parameters - Connection Technology

Mechanical Parameters - Dimensions

Environmental Conditions

Environmental Conditions - Insulation Values

Electrical Parameters

Electrical Parameters - Coil Control

Electrical Parameters - Safety Contacts

Electrical Parameters - Auxiliary Contacts

Other Data

Note about the safety classification

Safety classification of the interlocking function

Basically suitable up to Cat. 1 / PL c. With 2-channel usage with fault exclusion mechanism (if a fault exclusion to the 1-channel mechanics is authorised) and suitable logic applicable up to Cat. 3 / PL d.

MTTFD = (B10D / (0.1 x n_op)) where n_op = (d_op x h_op x 3600 s/h) / t_cycle

(Determined values can vary depending on the application-specific parameters h_op, d_op and t_cycle as well as the load.)

If multiple safety components are wired in series, the Performance Level to EN ISO 13849-1 will be reduced due to the restricted error detection under certain circumstances.

Safety classification of the guard locking function

If the device is used as an interlock for personal safety, a safety classification of the guard locking function is required. When classifying the interlock function, a distinction must be made between monitoring of the interlock function (locking function) and controlling the unlocking function. The following safety classification of the unlocking function is based on the application of the principle of safety energy disconnection for the solenoid supply.

! The classification of the unlocking function is only valid for devices with monitored guard locking function and in the power to unlock version (see ordering code).

3 Mounting

3.1 General mounting instructions

Please observe the remarks of the standards EN ISO 12100, EN ISO 14119 and EN ISO 14120.

! Three mounting holes are provided for fixing the enclosure. The solenoid interlock is double insulated. The use of an earth wire is not authorised. The solenoid interlock must not be used as an end stop. Any mounting position. The mounting position however must be chosen so that the ingress of dirt and soiling in the used opening is avoided. Unused actuator openings must be sealed with slot sealing plugs.

! The actuator must be permanently fitted to the safety guards and protected against displacement by suitable measures (tamperproof screws, gluing, drilling of the screw heads).

3.2 Dimensions

All measurements in mm.

[Diagram showing dimensions of the solenoid interlock]

3.3 Manual release

(for set-up, maintenance, etc.)

Manual release is realised by turning the triangular key by 180° (M5 triangular key available as accessory), so that the locking bolt is pulled into the unlocking position. Please ensure that jamming by external influence on the actuator is avoided. The normal locking function is only restored after the triangular key has been returned to its original position. After being put into operation, the manual release must be secured by installing the plastic cover, which is included in delivery.

Lateral manual release: Manual release on the cover side or on the rear side (ordering suffix -ED/-EU)

[Diagram showing manual release operation]

3.4 Emergency release (ordering suffix -N)

(Fitting and actuation only from outside the hazardous area)

! The emergency release should only be used in an emergency. The solenoid interlock should be installed and/or protected so that an inadvertent opening of the interlock by an emergency release can be prevented. The emergency release must be clearly labelled that it should only be used in an emergency. The label can be used that was included in the delivery.

To activate the emergency release in case of an emergency, the orange lever must be turned to the stop in the direction marked by the arrow. In this position, the safety guard can be opened. The lever is latched and cannot be returned to its original position. To cancel the blocking condition, the central mounting screw must be loosened to such extent that the lever can be turned back into its original position. The screw must then be re-tightened.

3.5 Emergency Exit

(Fitting and actuation only from within the hazardous area)

To activate the emergency exit of the T version in case of an emergency, the orange lever must be turned to the stop in direction marked by the arrow. The emergency exit function of the TD and TU versions is activated by pressing the red pushbutton. In this position, the safety guard can be opened. The blocking condition is cancelled by turning the lever in opposite direction or by pulling back the pushbutton. In unlocked position, the safety guard is protected against unintentional closing.

Lateral emergency exit (ordering suffix -T)

Emergency exit on the cover side or on the rear side (ordering suffix -TD/-TU)

4 Electrical connection

4.1 General information for electrical connection

! The electrical connection may only be carried out by authorised personnel in a de-energised condition.

! If the risk analysis indicates the use of a monitored interlock, they are to be connected in the safety circuit with the contacts indicated with the symbol [monitoring symbol].

Appropriate cable glands with a suitable degree of protection are to be used. Remove the walls of the mounting holes by inserting the cable entry. All plastic residues must be removed from the switch compartment.

! Puncturing the wall of the holes with auxiliary tools (e.g. screwdriver) can cause damage.

Settle length x of the conductor:

• on cage clamps (CC) of types or : 6 mm
• on screw terminals (SK): 7 mm

[Diagram showing conductor length preparation]

Once the connection has been made, clean any dirt from the inside of the switch and refit the housing cover. The tightening torque of the cover screws is 0.6 Nm. The tightening sequence of the screws is shown in the following illustration.

[Diagram showing screw tightening sequence]

4.2 Contact Options

Contacts shown in a de-energised condition and with the actuator inserted.

Power to unlock

[Diagram of Power to unlock contact configuration for AZM 161SK-12/12 and AZM 161CC-12/12]

[Diagram of Power to unlock contact configuration for AZM 161SK-12/03 and AZM 161CC-12/03]

Power to lock

[Diagram of Power to lock contact configuration for AZM 161SK-12/12 and AZM 161CC-12/12]

[Diagram of Power to lock contact configuration for AZM 161SK-12/03 and AZM 161CC-12/03]

Key:

• [Key symbol for positive break NC contact] Positive break NC contact
• [Key symbol for monitoring] Monitoring the interlock according to EN ISO 14119
• [Key symbol for actuated] Actuated
• [Key symbol for not actuated] Not actuated

[Wiring diagrams for various AZM 161ST models and AZM 161..-G with LED]

[Diagram of Integrated contact kit 12/12 G (with LED)]

The 24 V are led internally to contacts 13 and 63. The corresponding signals of the LED display can also be tapped at terminals 14 or 64.

[Diagram of Integrated contact kit 12/03 G (with LED)]

The 24 V are led internally to contacts 11 and 63. The corresponding signals of the LED display can also be tapped at terminals 12 or 64.

Legend:

Power to unlock

Power to lock

5 Set-up and maintenance

The safety function of the safety components must be tested. In the case of correct installation and adequate use, the safety switchgear features maintenance-free functionality. A regular visual inspection and functional test is recommended, including the following steps:

1. Check fixation of the safety switch and the actuator.
2. Check fitting and integrity of the cable connections.
3. Remove particles of dust and soiling.

! Adequate measures must be taken to ensure protection against tampering, for instance by means of replacement actuators.

! Damaged or defective components must be replaced.

6 Disassembly and disposal

6.1 Disassembly

The safety switchgear must be disassembled in a de-energised condition only.

6.2 Disposal

[Disposal symbol] The safety switchgear must be disposed of in an appropriate manner in accordance with the national prescriptions and legislations.