Pulse Acquisition Channels; Incremental Encoders With Inverted Signals (Symmetrical Circuitry); Incremental Encoders Without Inverted Signals (Asymmetrical Circuitry); Table 1-5: Configuration Of The Incremental Encoders For Symmetrical And Asymmetrical Operating Modes - Addi-Data APCI-8001 Option Manual

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1.3.1.9

Pulse acquisition channels

The OPMF is fitted with up to five pulse acquisition channels, to which various encoder types, such as linear
scales or incremental or absolute encoders can be connected. Two 90° phase-shifted quadrature signals are
processed as input signals, with a maximum pulse frequency of 2.0 MHz (optionally 5 MHz) and TTL
sensors. A zero track (index signal) can also be evaluated. The signal levels acquired by the encoders are
electronically quadrupled and processed internally as floating-point numbers with double accuracy. This
means that the value range for the traverse path is virtually unrestricted.

1.3.1.9.1 Incremental encoders with inverted signals (symmetrical circuitry)

Incremental encoders with symmetrical outputs are particularly suitable for industrial use and are preferred,
as the output signals are available with inverted and non-inverted signal sensors for all tracks. This enables
pulses to be acquired reliably, even in environments that are subject to severe electromagnetic interference.
The evaluation electronics on the OPMF are based on the RS422 standard and form a signal difference
between the inverted and non-inverted input signal. Interference that is linked with transmission lines, can
thus effectively be suppressed.
Important: In the factory, the OPMF is delivered for incremental encoders with symmetrical outputs but can
be configured by the user for asymmetrical encoders (see next table).

1.3.1.9.2 Incremental encoders without inverted signals (asymmetrical circuitry)

It is also possible to process incremental encoders without inverted pulse trains. However, these should only
be used in environments that are not subject to severe electromagnetic interference, e.g. in laboratory
applications. Please also ensure that the encoder cable is only a few metres long, especially for high pulse
frequencies.
Table 1-5: Configuration of the incremental encoders for symmetrical and asymmetrical operating
modes
Axis Signal Solder
channel source jumper
4 CHA4- J15 (8001)
J15 (8008)
CHB4- J22 (8001)
J16 (8008)
NDX4- J23 (8001)
J17 (8008)
5 CHA5- J14 (8001)
J19 (8008)
CHB5- J20 (8001)
J20 (8008)
NDX5- J21 (8001)
J21 (8008)
6 CHA6- J13 (8001)
J23 (8008)
CHB6- J18 (8001)
J24 (8008)
NDX6- J19 (8001)
J25 (8008)
7 CHA7- J16 (8001)
J27 (8008)
CHB7- J25 (8001)
J28 (8008)
NDX7- J24 (8001)
J29 (8008)
Asymmetrical
Bridged
Do not connect pin 4 / X1
Bridged
Do not connect pin 6 / X1
Bridged
Do not connect pin 8 / X1
Bridged
Do not connect pin 21 / X1
Bridged
Do not connect pin 23 / X1
Bridged
Do not connect pin 25 / X1
Bridged
Do not connect pin 37 / X1
Bridged
Do not connect pin 39 / X1
Bridged
Do not connect pin 41 / X1
Bridged
Do not connect pin 4 / X2
Bridged
Do not connect pin 6 / X2
Bridged
Do not connect pin 8 / X2
Symmetrical
Unbridged
Connect pin 4 / X1
Unbridged
Connect pin 6 / X1
Unbridged
Connect pin 8 / X1
Unbridged
Connect pin 21 / X1
Unbridged
Connect pin 23 / X1
Unbridged
Connect pin 25 / X1
Unbridged
Connect pin 37 / X1
Unbridged
Connect pin 39 / X1
Unbridged
Connect pin 41 / X1
Unbridged
Connect pin 4 / X2
Unbridged
Connect pin 6 / X2
Unbridged
Connect pin 41 / X2
O
PTIONS MANUAL