With correct wiring, the supply current flows from the power supply 2L+ via terminal 29 to the
module |
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In the module, the current flows via the output driver and exits the module via
terminal 40. |
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| f a wire break occurs on the second ground cable from the central block terminal to |
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erminal 30, the module can continue to operate without restrictions, as it is still connected to
the ground via the first cable from the central terminal block to terminal 40If a wire break occurs othe first and on the second ground cable from the central terminal
block to the terminals 30 and 40 of the module, a malfunction occurs on the module. Both
ground connections of the module are interrupted.
The supply current flows from the power supply 2L+ via terminal 29 to the module. In the
module, the current flows via the output driver into the parasitic diode and exits the module
via the output terminal, e.g. as shown in the figure via terminal 27. The supply current
therefore flows via the connected load. The internal supply current is typically 25 mA.
WARNING
Interruption of both ground cables
If the ground terminals 30 and 40 are interrupted, the following incorrect response can
occur:
The activated outputs, which are switched to high, start to switch back and forth between
high and low. If the load connected at the output is sufficiently small, the output is
continuously activated.Terminals 30 and 40 are connected in the front connector and only routed with one cable to
the central terminal block. If this cable breaks, terminals 30 and 40 are no longer connected
to the ground. The module's supply current flows out via the output terminal.If a break occurs in the common cable, the current of the outputs flows via terminal 30 to the
module and via terminal 40 to the central terminal block. The current flows via the module.
WARNING
Current flow with faulty wiring
If a break occurs in the common cable, the current can be very high, depending on the
plant, and lead to the destruction of the module.Equipotential bonding occurs via terminals 30 and 40. When a potential difference exists
between the grounding points FE1 and FE2, the compensating current flows via terminals 30
and 40.
WARNING
Current flow with faulty wiring
In the event of a potential difference, the current can be very high, depending on the
potential conditions, and lead to the destruction of the module.If you use standard digital inputs with "None" set as the input delay, you must use shielded
cables. Shielding and the infeed element are recommended for use of standard digital inputs
starting from an input delay of 0.05 ms but are not absolutely necessary.You connect the encoder signals, the digital input and output signals and the encoder
supplies to the 40-pin front connector of the digital on-board I/O. For information on wiring
the front connector, creating the cable shield, etc., refer to the , ET 200MPThe 24 V encoder signals are designated with letters A, B and N. You can connect the
following encoder types:
● Incremental encoder with signal N:
