● Transmission procedure: Differential or non-symmetrical signal transfer
● Signals:
– Differential signal transfer (RS422):
For each track a signal and a negated signal
– Non-symmetrical signal transfer:
For each track, a 5 V TTL signal
● Max. output frequency: 500 kHz
● Phase shift of Track A to Track B: 90° ±30°
● Supply: 5 V, max. 250 mA
Differential signal transfer is the preferred technique, as it is insensitive to electromagnetic
disturbances.
Note
The SINUMERIK 828D software can process up to three handwheels. You can connect two
handwheels to the PPU. You can connect an additional handwheel to the machine control
panel, see Connectable components (Page 93).
Cable specification
Table 6-10 Cable specification for X143
Feature Version
Connector type: 12-pin screw terminal
Cable type: Twisted pair, shielded
Article number 6FX8002-2BB01-1A□□
Max. cable length 3 m
6.8 USB
Use
The USB interfaces correspond to the norm and are, therefore, not described in detail here.
● The X125 USB interface (at the front behind a flap) can be used to connect a USB-
FlashDrive for transferring user and commissioning data.
● The X135 USB interface (at the rear) is available only for service purposes.
Interface description
6.8 USB
PPU
Manual, 01/2014, 6FC5397-2DP40-3BA3 89
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