p 8/58
Technical Manual NAM-BL4x-MT-EN-C
The information in this document is the property of Automatic Systems and is confidential. The consignee withholds from using it for anything other than the use of the products or the execution of the
project to which they belong and withholds from communicating it to third parties without prior written agreement from Automatic Systems. Document subject to change without prior notice.
2.3. Mechanical locking of the arm
The lock type NO in closed position is standard on the equipment. However locks are available as an option
for the open position or in the NC type (locking in power outage).
These locks are placed on the reinforcing V-blocks (19), under the cover.
Note
: Depending on the desired operating mode (specified when the order is placed), the installed locks will
be of NO (standard) or NC (option) type (see table in Ch. 2.2). However, for locking in both positions, the 2
locks will be systematically of the same type (NO or NC), as they are controlled by the same electromagnet.
The above illustration represents the locking of the arm in the
open
position by means of an
NC
lock. The
operation described below corresponds to this configuration, but can be applied in principle to other
configurations.
The lock is of the Normally Closed type: In standby mode (turned off), the spring (81) pushes the shank (82)
out of the electromagnet (80), which closes the clips (83) around the locking pin (84). The locking pin being
fastened to the hub (13), which in turn is attached to the arm’s driving shaft, which is therefore locked.
When a close command is sent to the barrier, the electromagnet is turned on. The shank (82) is pulled
towards the electromagnet, which results in the clips (83) opening.
At the same time, a pulse is given to the arm in the other direction (opening), to unlock the mechanism (the
clips could be stuck by the locking pin if the arm has been subjected to major stress in a locked position).
The closing of the arm is only started when the inductive sensor (86) detects the shank’s end washer, which
corresponds to the opening of the clips and the unlocking of the arm.
If the arm is not unlocked within 3 seconds, the barrier is put out of service.
Once the arm is closed (detection by the limit switch sensor (7, Ch. 2.1. ), the electromagnet is switched off
.
LOCK NC DURING STANDBY (POWER OFF)
80
LOCK NC WHEN POWERED (POWER ON)
OPTION
LOCKING OF
THE ARM IN
OPEN
POSITION
81
82
83
84
84
21
86
19. Reinforcing V-block (see Ch. 2.1. )
80. Electromagnet
81. Call back spring
82. Clip driving rod
83. Locking clips
84. Locking pin
86. Inductive sensor
19
