Siemens SIMATIC S7-1500/ET 200МР Manual page 19

Wiring
3.1 Pin assignment and block diagram
Digital inputs DI0, DI1 and DI2
The digital inputs are used for gate control, synchronization and the Capture function.
The digital inputs of the two counter channels are not isolated from one another.
Input delay for digital inputs
In order to suppress signal noise you can configure an input delay for the digital inputs.
Note
If you select the "None" or "0.05 ms" option, you must use shielded cables for connection of
the digital inputs.
Digital outputs DQ0 and DQ1
The digital outputs of the two counter channels are not isolated from one another.
The digital outputs are 24 V sourcing outputs in reference to M and can carry a rated load
current of 0.5 A. They are protected against overload and short-circuit.
Relays and contactors can be directly connected without an external protective circuit. You
can find information on the maximum possible operating frequencies and the inductance
values of the inductive loads connected to the digital outputs in section Technical
specifications (Page 77).
24 V encoder signals/count signals
The 24 V encoder signals are designated with the letters A, B and N. You can connect the
following encoder types:
• Incremental encoder with N signal:
The A, B and N signals are connected using the correspondingly marked terminals. The
A and B signals are the two 90° phase-shifted incremental signals. N is the zero mark
signal that supplies one pulse per revolution.
• Incremental encoder without N signal:
The A and B signals are connected using the correspondingly marked terminals. The
A and B signals are the two 90° phase-shifted incremental signals. The N terminal remains
unconnected.
• Pulse encoder without direction signal:
The counting signal is connected to the A terminal. The count direction can be specified
via the control interface. The B and N terminals remain unconnected.
18
Technology module TM Count 2x24V (6ES7550-1AA01-0AB0)
Equipment Manual, 12/2020, A5E31870371-AC