HEIDENHAIN ND 287 User Manual - Manual (Page 91)

ND 287
91
II – 2 Installation Set
u
p
Switching inputs test
The ND displays a list with all switching inputs at the D-sub connection
X41 (see "Switching inputs at D-sub connection X41" on page 93). The
pins are listed together with their designations, a gray/green dot and
their current states (HIGH or LOW). The function of the inputs at
connection X41
can be tested:
 As soon as a pin has been activated (=LOW), the gray dot next to
the respective pin designation becomes green and the status
changes to LOW if the input functions correctly.
Danger to internal components!
 The power supply of external circuits must comply with
EN 50178 requirements for low voltage electrical
separation
.
 Connect inductive loads only with a quenching diode
parallel to the inductance
.
Danger to internal components!
Use only shielded cables and connect the shield to the
connector housing
.
Fig. II.56 Switching inputs test