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Signal input P1 and P2 (position switches for protective door)
P1 is supplied by test signal T1, and P2 by test signal T2. These terminals are used to
connect the position switches for the protective door with a tumbler. To achieve maximum
fail-safety (Performance Level e in accordance with DIN EN ISO 13849-1 and SIL3 in
accordance with IEC EN 61508), the position switches are connected with two channels.
The position switches are monitored for simultaneity. When the position switches are
opened, contacts P1 and P2 must be opened within t < 0.5 s. If simultaneity is not satisfied,
a diagnostics message appears on the display. After correction of the fault, it is necessary to
perform a reset (see Chapter "Troubleshooting (Page 55)") or a restart by switching the
supply voltage off and on.
Both position switches must be closed to start output contact 23/24. When connecting a
single-channel position switch or two individual single-channel position switches for a lower
category, detection of simultaneity must be disabled in the menu. Terminals T2 and P2 must
be jumpered when using a single-channel position switch.
If no position switches are used, terminals T1 must be jumpered with P1, and terminals T2
with P2.
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.
Signal input EA1 and EA2 (operating mode selection)
The speed monitor is suitable for monitoring 2 operating modes (setup and automatic mode).
The relevant speed limits for both operating modes are set in the menu using the
pushbuttons. Safety-related selection of the operating mode, and thus the speed to be
monitored, is carried out with an antivalent switch connected in a two-channel configuration
to connections EA1 and EA2.
Monitoring of the setup speed is selected if EA1 is connected with T1 via the antivalent
selector switch, and EA2 is disconnected from T2 by the antivalent switch. To monitor
automatic speed, EA1 must be disconnected from T1 by the antivalent switch, and EA2 must
be connected to T2 via the antivalent selector switch. The two channels of the switch are
monitored for simultaneity (t
between EA1 and EA2, the device goes to a safe fault state. After correction of the fault, it is
necessary to perform a reset (see Chapter "Troubleshooting (Page 55)") or a restart by
switching the supply voltage off and on.
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.
3TK2810-1 safety-related speed monitor
System Manual, 01/2011, 926246402000 DS 02
< 0.5 s). If simultaneity is not satisfied, or a cross-circuit exists
diff
3.1 Terminals and their functions
Functions
25
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