Device Functions Of The Dm-F Local - Siemens SIMOCODE pro Manual

6.3

Device functions of the DM-F LOCAL

DIP switch settings, DM-F Local
Table 6- 2 Meaning of the DIP switches, DM-F Local
DIP Parameter
switch
1 With / without cross-circuit
detection
2 Evaluation:
1 NC + 1 NO evaluation /
2 NC evaluation
3 Connection type:
2x 1-channel /
1x 2-channel
4 Debouncing time for
sensor inputs
50 ms / 10 ms
5 Start mode of sensor input •
SIMOCODE pro - Fail-Safe Digital Modules
Manual, 11/2017, NEB631679702000/RS-AA/002
Function
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. In this case, the DM-F Local no longer monitors the
sensor inputs for cross-circuits. 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
electromagnetic switches, can also be evaluated. Make sure 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). The two sensors are
•
"ANDed". 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 debouncing time is not evaluated.
Debouncing time 50 ms: Switch position changes of strongly bouncing contacts
•
are suppressed (e.g. position switches on heavy protective doors).
Debouncing time 10 ms: The shorter debouncing time permits faster deactivation
•
of bounce-free sensors (e.g. light arrays).
Automatic start: The enabling circuits are switched to the active position as soon
as the starting condition at sensor inputs Y12, Y22, Y34 and terminal 1 have been
fulfilled. The start button connection terminal Y33 is not queried.
Monitored start: The enabling circuits are switched to the active position as soon
•
as the switch-on condition is satisfied at the sensor inputs Y12, Y22, Y34, and at
terminal 1, and the start button at the Y33 terminal is actuated (start at falling
edge).
Planning/Configuring
6.3 Device functions of the DM-F LOCAL
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