BECKHOFF M3120 - Manual (Page 10)

M3120 Incremental encoder 4x Beckhoff II/O-Lightbus
Page 10 of 14 Version 1.1 Date 20.10.94
4. Installation
The module M3120 is connected to the fibre optic ring using fibre optic connectors (Beckhoff
Z1000). The maximum length of the FO cable, leading to the neighbouring boxes, should not
be more then 600 m for glass fibre or 45 m for other fibres. These values are only valid if for
bending the cable a radius of at least 30 mm is used. If there are no glass fibres used, no
special tools are needed for installation of the plugs.
The module M3120 is installed dezentralized from the machine. Sensors and actors are
connected to the box directly by D-SUB connectors (connector X20, X30, X40, X50).
You can take the power supply for a 5 V or 15 V incremental encoder directly from this
S-SUB connectors.
The LEDs show the status of the module.
Configuration
You can select the times of evaluation over bridges to GND inside the D-SUB connector:
EE1 EE0 evaluation
bridge to
GND bridge to
GND 1 time
bridge to
GND open,
no bridge 2 times
open,
no bridge bridge to
GND 4 times
open,
no bridge open,
no bridge -
In case an encoder with single outputs is to be connected, the input "Kom" must be connected
to GND (inside the D-SUB connector X20, X30, X40, X50).
In case an encoder eith complementary outputs is to be connected, the bridge "JP" has to be
removed.
Power supply
A two pin plug in connector is used to establish the 24 V DC power supply. (X10)