Fagor DDS Series Hardware Manual page 292

   Installation
8.
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DDS
HARDWARE
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Direct feedback connection
The direct feedback device may be a linear encoder (incremental or
absolute) or an external rotary encoder.
The connection is made between the connector of the linear encoder or
external encoder and connector (X3) of the drive. For further detail on the
cables supplied by FAGOR for connecting the direct feedback, see chapter
7. CABLES .
Encoder simulator connection
Depending on motor feedback, the drive can generate a set of signals that
simulate those of a TTL encoder attached to the rotor of the motor.
The encoder simulator board of the drive is connected to the CNC through
the connector X3 of each drive (see its front panel) and connectors X1, X2,
X3 or X4 of the 8055 CNC. For an 8055i CNC, the connectors will be X10,
X11, X12 and X13.
For further detail on CNC connection, see the corresponding CNC manual.
See chapter 7. CABLES for further detail on the cables supplied by FAGOR
for this connection.
Connection for the reception of the analog command
Connector X7 of the drive has two analog input to receive the analog velocity
command sent out from connector X8 of the 8055 CNC. Connector X7 offers
± 15 V DC to easily generate the velocity command with a potentiometer. An
internal parameter of the drive selects the input that the DDS system attends
to. See parameter IP1 in chapter 13 of the "man_dds_soft.pdf" manual.
F. H8/26
Analog velocity command inputs.
Connection for the digital outputs
When the drive outputs are connected to inductive loads, we must protect
the optocoupler with circuits such as the ones shown in the next figure:
F. H8/27
Protection circuits for the opto-coupler of the digital output with inductive loads.