Ttl-Signal At Rs485-Input; Connection Example: Incremental Encoder; Fig. 6-5: Connection Example: Incremental Encoder - Addi-Data MSX-E1701 Manual

MSX-E1701: Incremental counter

6.2.2 TTL-signal at RS485-input

Note:
This function is only available on the MSX-E1701 and not on the
MSX-E1701-24.
Always at Pin D of the M23 female connector it is possible to output a reference
voltage of 1.4 V. The voltage can be added via software. With the help of this
reference voltage TTL-signals can be put on the RS485 inputs. As soon as the
reference voltage is output at Pin D-, no differential signal can be connected
anymore to input D, only TTL signals.
Example: TTL signal at input D
The reference voltage must be output at Pin D-. GND of the TLL signal must be
connected to GND of the female connector. The TTL signals must be connected
to D+.
Example: TTL signal at input A, B, C
The reference voltage must be output at Pin D-. The reference voltage must be
connected externally from Pin D- to the required negative input (A-, B- or C-).
The GND of the TTL signal must be connected to the GND of the female
connector. The TTL signal must be connected to the required positive input (A+,
B+ or C+).
6.3

Connection example: Incremental encoder

The encoder ROD 420 of HEIDENHAIN is connected to a counter of the Ethernet
I/O module MSX-E1701.

Fig. 6-5: Connection example: Incremental encoder

Connecting the peripheral
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