Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
2.13 ADI4 (analog drive interface for 4 axes) (SW 09.01 and higher)
The housing of the ADI4 module must be connected with the back wall of the
cabinet and this, in turn, to the motors/machine through a low-resistance contact
for high-frequency interference currents. The ideal way of mounting the module
is on an unpainted mounting wall. The mounting wall must be connected to the
motors/machine by a large-area and conductive contact. Painted cabinet walls
and DIN rails, or similar mounting accessories with a small contact area do not
fulfill this requirement.
Power and signal cables must always be laid apart. All signal cables of the I/O
interfaces (X6-1/X6-2) must be routed together. Single cores whose signals are
related must be twisted. Signal cables and encoder cables must ideally be laid
All cables within the cabinet must be routed as close as possible to the cabinet
walls, long routing through the open space can cause interference (antenna
effect). The vicinity of sources of interference (contactors, transformators, etc.)
must be avoided, placing a shield plate between the cable and the source of
interference, if necessary. Cable extension through terminals, etc. must be
avoided. To protect interference from external sources, signal cables must be
The ADI4 is designed for operation in an enclosed cabinet. Operation outside
an enclosed cabinet is not permissible.
To power the ADI4 module (+24VDC), an external power supply source is
required. The power supply source is connected through terminal X1
(P24EXT1) on the front panel of the ADI4 module. See Subsection 2.13.2,
To power the digital outputs (+24VDC), an external power supply source is
required. The power supply is connected through terminal X6-1, pin 1
(P24EXT2). See Subsection 2.13.2, page 2-107.
If the internal power supply from X6-2, Pin 1 (P24OUT) is not used to power the
digital inputs, it can be replaced by an external power supply source (+24VDC,
max. 1A) as an option.
The reference ground (GND) of the external power supply source must be con-
nected with X6-2, pin 12. X6-2, pin 1 (P24OUT) remains open.
2 Hardware Descriptions