Operating Instructions: Alfred Solenoid Controlled Guard Lock
9
Functionality
The Alfred Solenoid Controlled Guard Lock product can be configured from a selection of Actuators, Head modules and Key
Adaptor modules all mounted above an Ex Rated Solenoid Module.
The Ex Rated Solenoid Module provides a locking function to securely trap either the Actuator and Head mechanism and/or
an assembled Key Adaptor mechanism
In an Alfred Solenoid Controlled Guard Lock product without any Key Adaptor modules included, the Ex Rated Solenoid
Module can be used to directly lock and secure a guarded area.
In an Alfred Solenoid Controlled Guard Lock product with a Key Adaptor module included, the Ex Rated Solenoid Module
can be used to lock and trap a key operation, while the assembled Key Adaptor(s) can be sequenced to lock and secure a
guarded area.
Dual Safety Circuits within the Ex Rated Solenoid Module can be paired to a machine control and guarding system to
generate a machine-stop command on either the unlocking or opening of a guarded area or operation of an interlocked key.
• In Safety-On-Guard-Locking type Solenoid Modules (EXPXL411 & EXPXL471) the Safety Circuits will change on the
unlocking or locking of the internal Solenoid mechanism.
• In Safety-On-Guard type Solenoid Modules (EXPXL416 & EXPXL461) the Safety Circuits will change on the insertion and
extraction of the Actuator into/from the Head Module or, if Key adaptors are included, on the operation of the primary Key
Adaptor.
Alfred Solenoid Controlled Guard Lock Product with Power-to-Unlock Ex Rated Solenoid Module
(EXP - - - XL411 and EXP - - - XL416)
Closing and Locking:
• Close the Gate / Door of the guarded area to Insert the Actuator into the Head Module
Note:
Some Actuators require additional operation to insert into Head Module, see specific functioning sections below.
• If Alfred product is fitted with Key Adaptors, operate them into their closed or ‘machine-run’ state.
Note:
Exact sequence of Key Adaptor operation can vary depending on product selection and configuration. See specific
functioning section below.
• With Solenoid de-energised, the Internal mechanism of the Power-to-Unlock Ex Rated Solenoid Module automatically
engages to lock the Head module and any Key module (if fitted) placing the complete Alfred Product into its Locked state.
• Once Locked, the Safety Circuits of the Ex Rated Solenoid Module will be made / closed, the Gate Monitor Circuit will be
open / broken, and the Solenoid Monitor Circuit will be open / broken.
Unlocking:
• Energise the Solenoid.
• Internal locking mechanism dis-engages to remove locking force from the Head Module and / or Key Adaptor Module (if
fitted).
• Switch status for Safety-on-Guard-Locking type Ex Rated Solenoid Module with fully Monitored Solenoid Safety
(EXPXL411);
◦Safety Circuits open / break, Solenoid Monitor Circuit makes / closes.
• Switch status for Safety-on-Guard type Ex Rated Solenoid Module with Un-Monitored Solenoid Safety (EXPXL416);
◦Safety Circuits remain closed, Solenoid Monitor Circuit makes / closes.
Opening:
• Remove the Actuator from the Head Module or operate the primary Key Module (if fitted).
• Switch status for Safety-on-Guard-Locking type Solenoid Module (EXPXL411);
◦Gate Monitor Circuit makes / closes.
◦Safety Circuits remain broken, Solenoid Monitor Circuit remains closed.
• Switch status for Safety-on-Guard type Solenoid Module (EXPXL416);
◦Safety Circuits open / break, Gate Monitor Circuit makes / closes.
◦Solenoid Monitor Circuit remains closed.
Auxiliary Release Function:
During product installation and commissioning, or in the event of a power failure it may be necessary to perform a manual
Auxiliary Release operation to Unlock and Open the Ex Rated Solenoid Module.
• Use supplied Override Key to rotate and operate the centrally located Override spindle 90˚ Clockwise. (See Figure 7)
• Internal locking mechanism dis-engages to remove locking force from the Head Module and/or Key Module (if fitted).
• Switch status for Safety-on-Guard-Locking type Solenoid Module (EXPXL411);
◦Safety Circuits open / break, Solenoid Monitor Circuit makes / closes.
• Switch status for Safety-on-Guard type Solenoid Module (EXPXL416);
◦Safety Circuits remain closed, Solenoid Monitor Circuit makes / closes.
