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DM-F Local
Without / with cross-circuit
detection
1NC contact + 1NO contact
evaluation / 2NC contact
evaluation
2x 1-channel / 1x 2-channel
Delay time for sensor inputs
50 ms / 10 ms
SIMOCODE PRO V PN FDI
Programming and Operating Manual, 05/2020, A5E44499659002A/RS-AA/001
Description
Without / with cross-circuit detection Cross-circuit
detection is only possible with potential-free sensors. In
this case, the sensors must be connected between T1 -
Y12, Y33 and T2 - Y22. The device anticipates the T1
terminal test signal on terminals Y12 and Y33. Likewise,
the T2 terminal test signal is anticipated on terminals Y22
and Y34. In the event of the signals on Y12, Y33 and
Y22, Y34 not corresponding to the T1 and T2 test
signals, the device detects a sensor fault. When
electronic sensors such as light arrays or laser scanners
are connected, cross-circuit detection must be disabled.
The DM-F Local no longer monitors the sensor inputs for
cross circuiting. Usually, the outputs of safety sensors
(OSSD) are monitored for cross circuiting in the sensor
itself.When the device has been parameterized as
"without cross-circuit detection", the T1 and T2 test
outputs are switched off and must not be reconnected.
The DM-F Local anticipates a +24 V DC signal from the
same current source from which the device is powered
on inputs Y12, Y22, Y33 and Y34 (DM-F Local-*1AB00
only) or from T3 (static +24 V DC).With the DM-F Local-
*1AU00 device version, terminal T3 must be connected
to the potential-free sensor contacts, due to the galvanic
isolation of the input circuit and the sensor supply.
In addition to the 2-channel connection of aligned sensor
contacts (NC/NC), sensors with opposing contacts
(NC/NO) often used for magnetically-operated switches)
can also be evaluated. In this case, please ensure that
the NC contact is connected to Y12 and the NO contact
is connected to Y22.
• 2 sensors, each with one contact (2x 1-channel)
(NC/NC). Here, the sensors are "AND"-connected
with one another. Simultaneity is not monitored.
• 1 sensor with 2 contacts (1x 2-channel) (NC/NC).
Here, it is expected that both contacts open
simultaneously.
During the delay time, sensor signal changes are not
evaluated.
• Delay time 50 ms: Changes in the switching position
of strongly bouncing contacts are hidden (e.g. position
switch on heavy protective doors).
• Delay time 10 ms: The shorter delay time allows for a
quicker tripping of bounce-free sensors (e.g. light
arrays).
Standard Functions
12.7 Safety Oriented Tripping
103
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