Use of encoders
NOTICE
In order to achieve the highest possible SIL/PL when using encoders, 2-channel encoders
(4 tracks: A, A/, B, B/) with defined failure response (high-impedance outputs) must be
used. If such information cannot be found on the encoder manufacturer's data sheet,
then the failure response data must be requested from the encoder manufacturer.
Note
Vibrations and shocks can influence the output signals of encoders and proximity switches. For
this reason, it must be ensured that valid input signals are always present at the 3TK2810-1
speed monitor irrespective of any influences. When encoders are used, if vibrations and shocks
cannot be eliminated, it should be ensured through design measures that the output signals of
the encoder are not influenced. When proximity switches are used, it should be ensured that the
signal change takes place simultaneously on both channels. Failure to observe the above-
indicated information may result in error messages due to invalid signals.
Power-up/self-test
Once the power supply has been applied, the device performs a self-test. During the self-test
phase, all LEDs briefly light up (lamp test) and all the pixels on the display are energized for
approximately 2 seconds.
After power-up, the LEDs light up according to the device status.
Functional principle in setup mode
If the 3TK2810-1 safety-related speed monitor is switched to the setup mode (control of
terminal EA1), the output contact 13/14 closes immediately. If the machine speed is also within
the parameterized speed window, the output contact 23/24 closes.
If setup mode (control of terminal EA1) is selected, monitoring of the protective door contacts
is deactivated (sensor circuits T1/P1 and T2/P2). The protective door can now be opened by an
enabling command to the interlock magnets.
Versions and order numbers of the 3TK2810-1 speed monitor
MLFB
Designation
3TK2810-1BA41
Speed monitor 24 V DC screw-type terminal
3TK2810-1BA42
Speed monitor 24 V DC spring-loaded terminal
3TK2810-1KA41
Speed monitor 110 to 240 V AC/DC screw-type terminal
3TK2810-1KA42
Speed monitor 110 to 240 V AC/DC spring-loaded terminal
3TK2810-1BA41-0AA0
Speed monitor 24 V DC screw-type terminal;
for use with Namur sensors
3TK2810-1BA42-0AA0
Speed monitor 24 V DC spring-loaded terminal;
for use with Namur sensors
Product description
3.3 Basic versions
3TK2810-1 safety-related speed monitor
26
Equipment Manual, 05/2020, NEB926246402000/RS-AE/007
