Siemens SIMOCODE pro Operating Manual page 223

Description of the settings of the DIP switches on the DM-F Local
Table 4- 79 Description of the settings of the DIP switches, DM-F Local
DIP switches (DM-F Local)
With/without cross-circuit detection
1 NC + 1 NO evaluation / 2 NC evaluation
2x 1-channel / 1x 2-channel
Debounce time for sensor inputs 50 ms / 10 ms
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Operating Manual, 04/2017, A5E40507630002A/RS-AA/001
Cross-circuit detection is only possible with floating sensors. The
sensors must be connected between T1 - Y12, Y33 and T2 - Y22,
Y34. The device anticipates the T1 terminal test signal at the
terminals Y12 and Y33, and the T2 terminal test signal at the
terminals Y22 and Y34. The device detects a sensor fault if the signal
at the Y12, Y33 or the Y22, Y34 terminals is not identical to the test
signals T1, T2.
Cross-circuit detection must be deactivated if electronic sensors such
as light arrays or laser scanners are connected. The DM-F Local now
no longer monitors the sensor inputs for cross-circuit detection.
Usually, the outputs of safety sensors (OSSD) are already monitored
for cross-circuits in the sensor itself.
If "Without cross-circuit detection" is set on the device, the test
outputs T1, T2 are deactivated and may no longer be connected. At
the Y12, Y22, Y33, and Y34 inputs, the DM-F LOCAL expects a
+24 V DC signal from the same current source as the one from which
the device receives its power supply (possible only in the case of
DM-F LOCAL-1AB00) or from T3 (static +24 V DC).
In the case of the DM-F LOCAL-1AU00 device version, it is
imperative to connect the T3 terminal to the floating sensor contacts
due to the electrical isolation between the input circuit and the sensor
power supply.
In addition to 2-channel connection of the same types of sensor
contacts (NC / NC), sensors with opposite types of contacts
(NC / NO), as are frequently used for magnetically-operated
switches, can also be evaluated. In this case, ensure that the NC
contact is connected to Y12 and the NO contact to Y22.
2 sensors with one contact each (2x 1-channel) (NC / NC). It is
•
expected that both sensors are AND-connected. Simultaneity is
not monitored.
1 sensor with two contacts each (1x 2-channel) (NC / NC). The
•
system expects both contacts to be simultaneously open.
Any change in the sensor signal during the debounce time is not
evaluated.
Debounce time 50 ms: Changes in the switch position of strongly
•
bouncing contacts are suppressed (e.g. position switches on
heavy protective doors).
Debounce time 10 ms: The shorter debounce time permits faster
•
tripping in the case of bounce-free sensors (e.g. light arrays).
4.7 Standard functions
Description
Parameters
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