4
These are the most important operations in the automa-
tion designed to guarantee the maximum safety and reliabili-
ty of the automation system.
The testing of the detection device must be performed by
qualified and experienced personnel who must establish
which tests to conduct on the basis of the risks involved, and
verify the compliance of the system with applicable regula-
tions, legislation and standards, in particular with all the pro-
visions of EN standard 12445 which establishes the test
methods for automation systems for gates.
Testing can also be adopted as a method of periodically checking
that all the various devices in the system are functioning correctly.
The following checks must be made when testing the TCE detection
unit:
1. Make sure that the provisions listed in the «WARNINGS» chapter
have been carefully observed;
2. f the sensitive device is connected, disconnect it from terminals
10 and 11. Use an ohmmeter to measure the resistance value of
the sensitive device. Said value must be between 7700
Ω
and
8700
Ω
(nominal 8200
Ω
).
3. Switch the power supply to the TCE on, and check that the two
LEDs (LED1 and LED2) are off - deactivated state (Off).
4. Connect the sensitive device to Terminals 10 and 11, and check
that LED1 and LED2 are on - activated state (On).
5. Activate the sensitive device and check that LED1 switches off
immediately, and L2 switches off approximately 2 seconds later.
6. Deactivate the sensitive device, and check that both LED1 and
LED2 switch on immediately.
7. Repeat the tests described in stages 5 and 6, and check that
switching the TCE outputs does achieve the results set. These
are normally the immediate inversion of the motor, and stop after
approximately 2 seconds.
8. If the “Test” function has been used, check that the control unit of
the automation carries out the test correctly. What normally hap-
pens during the test is that LED1 switches off and switches on
again immediately afterwards.
9. Carefully check the automation as specified in Standards EN
12445 and EN 12978.
!
3) Testing
2.4) Example of a connection
Figure 6 shows an example of a TCE connection on a control unit for automations with the Phototest function.
7
8,2K
Ω
6
PHOTOTEST
24 V
COMMON
PHOTO
STOP
1
11
10
9
8
3
2
5
4
Sensitive device
TCE
6
2.5) Connection of 2 or more sensitive edges
TCE only has one input, but has two or more sensitive devices which carry out the same function. They can be connected “in cascade”, one
after the other (as shown in Figure 7) with a single 8.2K
Ω
termination resistance.
Constant resistance devices must be connected “in cascade”, and NOT in series or in parallel.
!
Sensitive edge
Sensitive edge
Sensitive edge
1
2
8,2k
Ω
n
°
10
11
7
