Siemens SIMATIC ET 200eco, Manual

Page: 49 / 124

Wiring
3-23
ET 200eco Distributed I/O Station
A5E00158716-02
3.4.4 Wiring the M12, 7/8” terminal block
Properties
•
Connect the power supplies and PROFIBUS DP to the M12, 7/8” terminal
block:
– M12 terminals: PROFIBUS DP
– 7/8” terminals: Power bus
•
You can loop the power supplies and PROFIBUS DP through the M12 or 7/8”
round sockets.
•
Always terminate the first and the last ET 200eco (node) on the PROFIBUS-DP
with a terminating resistor.
Requirements
•
Always switch off the power supply before you wire the M12, 7/8” terminal
block.
•
You have set the PROFIBUS address (according to your project configuration.
The terminating resistor is enabled if required)
Tools required
Stripping tool and screwdriver for wiring the M12 or 7/8” plug – if you are not using
ready–made plugs.
Accessories required
•
Prefabricated cable with plug
•
If you do not use a ready–made plug:
– M12: 2–conductor shielded cable (bus cable) and an M12 plug (see
Table 3-12)
– 7/8”: 5–conductor cable and 7/8” plug (see Table 3-13)
•
M12 terminating resistor for PROFIBUS DP
•
For order numbers please refer to Appendix A.