Siemens SINUMERIK ONE PPU 1740 Series, Equipment Manual

Page: 74 / 106

The following twelve inputs and eight inputs/outputs are used for drive control:
● At terminal X242, four inputs and four outputs are available for the NC.
● At terminal X252, four inputs and two outputs are available for the NC.
Note
Terminals MEXT1 ... MEXT4 must be connected for the digital inputs/outputs to function.
● Connect the incorporated ground reference of the digital inputs.
● Connect a jumper to terminal M on plug connector X1.
P24EXT (P1, P3) must also be connected so that the outputs function. An external supply can
also be connected here, or a jumper can be connected to terminal P at X1. This removes the
galvanic isolation for these digital inputs.
An open input is interpreted as "low".
Cable specification at X122, X132, X242 and X252
Please note the following:
● Use flexible cables with a cable cross-section of at least 0.25 mm
2
● Ferrules are not required.
● You can use ferrules without an insulating collar in accordance with DIN 46228, Form A long
version.
● You can connect two cables each with a cross section of 0.25 mm
2
in one ferrule.
Features Version
Connection option Up to 0.5 mm
2
Current carrying capacity 4 A max. 4 A
Max. cable length 30 m
Wiring the digital inputs/outputs
Tools required: 3.5-mm screwdriver or power screwdriver
Procedure:
1. Strip off 6 mm of cable insulation and, if necessary, press on a ferrule.
2. Wire the digital inputs of the interface for connection of the sensors.
3. Wire the digital outputs of the interface for connection of the actuators.
4. Insert the cable into the corresponding screw terminal.
Interface description
7.4 Digital inputs/outputs
PPU 1740
74
Equipment Manual, 01/2019, A5E47615272B AA