Siemens Sinumerik 801 Technical Manual page 47

!
Mains connection
Connecting the motor-end cables
Pulse interface
24V signal interface
Driving system design
SINUMERIK 801
Start-Up
Warning
Prior to performing connection work, always first make sure that the supply
voltage is switched off.
With the supply voltage switched off, hazardous voltages are present at the
mains and motor connections. Under no circumstances may these connection
be touched in the ON condition; otherwise, loss of life or severe personal
injury could be the consequence.
The device must be connected via an external fuse.
Fuse: K6A for 1 axis
K10A for max. 2 axes
If the transformer possesses a shielded winding, this should be
connected with low inductivity to PE.
Ground the transformer on the secondary side.
To connect the cables, remove the terminal box cover (3 screws).
Use the cable with the order no. 6FX6 002–5AA51–1..0
On the drive end, connect the cable shield to the housing such that an
electrical connection is provided via the appropriate strain relief clamp
and clamp the braided shield to PE.
On the motor side, braid the shield, provided it with a cable shoe and
clamp it to the grounding screw.
To connect the drive pulse interface to the SINUMERIK 801, use the
preassembled cable, order no.6FX6 002–5AA52–1..0.
On the drive side, connect the cable shield to the housing such that an
electrical connection is provided via the appropriate strain relief clamp.
To evaluate the 24 V high–side signals "Zero Phase" (ZPH) and/or "Drive
ready" (RDY) in the CNC, then connect a 24 V voltage (PELV) to the +24
V and 24 V GND terminals.
When a driving system for machine tools is configured with stepper drives, pay
attention to following requirements:
1.
Design the driving system according to the frequency – torque
characteristics of the stepper motors (see Fig. 2-11: Frequency – torque
characteristics of the stepper motors). The characteristic feature of the
stepper motors depends on the frequency-torque characteristics. The
motor will have a larger output torque while running at a low speed or a
smaller one while at a high speed (and also a high power dissipation and
Start-Up
2-31