1.2 Important... Read this before proceeding!
The user is responsible for satisfying all local, state, and national laws, rules, codes, and regulations relating to the use of
this product and its application. Banner Engineering Corp. has made every effort to provide complete application,
installation, operation, and maintenance instructions. Please contact a Banner Applications Engineer with any questions
regarding this product.
The user is responsible for making sure that all machine operators, maintenance personnel, electricians, and supervisors are
thoroughly familiar with and understand all instructions regarding the installation, maintenance, and use of this product, and
with the machinery it controls. The user and any personnel involved with the installation and use of this product must be
thoroughly familiar with all applicable standards, some of which are listed within the specifications. Banner Engineering
Corp. makes no claim regarding a specific recommendation of any organization, the accuracy or effectiveness of any
information provided, or the appropriateness of the provided information for a specific application.
1.3 Overview
The SI-GL42 Series Locking-Style Safety Interlock Switch with guard locking capability can be used to monitor the position
of a guard to detect its movement, opening, or removal.
The SI-GL42 Interlock Switch can also be used to secure the guard in place to allow the hazard time to stop before the
guard is opened. This allows the guard to be located closer to the hazard than otherwise possible in applications where the
guard can be opened and the hazard can be accessed. A guard can be a gate, door, cover, panel, barrier, or other physical
means that separates individuals from the hazard. Safety switches will issue a signal to the machine control system to
prevent or stop hazardous situations when the guard is not in the proper position.
The SI-GL42 Interlock Switch is designed for guard locking applications. There are two styles available:
• Spring Lock, Solenoid Unlock (Models SI-GL42DS..)—The actuator is mechanically locked when it is fully inserted
into the actuator head. The actuator is unlocked by applying voltage to the solenoid.
• Solenoid Lock, Spring Unlock (Models SI-GL42DM..)—The fully inserted actuator is locked when voltage is applied
to the solenoid. The actuator is unlocked when voltage is removed from the solenoid.
The SI-GL42 Interlock Switch is a type 2 locking fixture with an electromechanical latching device and low-level coding
according to ISO 14119.
Applications involving the use of the SI-GL42 Series Locking-Style Safety Interlock Switch should take into consideration
the following standards:
• EN ISO 13849-1 Safety-Related Parts of Control Systems
• EN ISO 12100 Safety of Machinery – General Principles for Design — Risk Assessment and Risk Reduction
• ISO 14119 (EN 1088) Interlocking Devices Associated with Guards – Principles for Design and Selection
• ISO 13857 Safety of Machinery – Safety Distances to Prevent Hazard Zones Being Reached
• ANSI B11.0 Safety of Machinery, General Requirements, and Risk Assessment
• ANSI B11.19 Performance Criteria for Safeguarding
SI-GL42 Series Locking-Style Safety Interlock Switch
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