Siemens SINUMERIK 808D ADVANCED Series Commissioning Manual page 84

Connecting
WARNING
Electric shock due to connection to an unsuitable power supply
When equipment is connected to an unsuitable power supply, exposed components may carry a hazardous voltage that
might result in serious injury or death.
The 24 V power supply must be protective extra-low voltage in accordance with EN60204-1, Section 6.4, PELV (with M
•
ground).
CAUTION
Damage to power supply due to incorrect grounding
Be sure not to connect pin 2 of X301/302 to ground; otherwise, the power supply of the control system could be damaged.
Note
The 24 V output of X301/302 pin 2 comes from pins 47 to 50.
Note
Addressing ranges
X301: IB3, IB4, IB5, QB2, QB3
X302: IB6, IB7, IB8, QB4, QB5
Note
The connecting cable between the power source, load current supply connection, and associated reference potential M must
not exceed the maximum permissible length of 10 m.
Digital inputs
The diagram below shows you how to connect the connector pins of the digital inputs at interface X301 (example). You can
connect connector X302 in the same way.
Note
When using an external power supply, you must connect the 24 V (permissible range: 20.4 V to 28.8 V) power supply for the
digital outputs to all the four power input pins (X301, X302: pins 47, 48, 49, 50).
84
Commissioning Manual
6FC5397-4EP10-0BA8, 07/2018