July 2013 3.29 MB 720 (FS) machine operating panel 331
Besides the snap-on keys, there are also keys with switch contacts that can
be wired by the machine tool builder depending on the application.
Specifications of the switch contacts on keys such as EMERGENCY STOP, NC
start, NC stop, Control voltage on:
Rated voltage: +24 V DC
Maximum current: 1.2 A
In standard wiring configuration, these keys are supplied with +24 V NC and
the lamps in these keys are driven with +5 V-NC / 10 mA. The keys and switch
contacts are not designed to power the two switch contacts or the LED with
different voltages, e.g. on contact with 24 V NC and the other with 24 V PLC.
Pin layout for MB 720 (FS) Connector Function Page
X18 Emergency stop (MB)
(pre-assigned by HEIDENHAIN)
332
X500 HSCI output 208
X502 HSCI input 208
X6 PLC inputs 332
X7 PLC outputs 333
X10 Interface to keyboard and
potentiometers
322
X23 Handwheel connection 347
X30 Connection for handwheel adapter 323
X31 Permissive button 335
X13 Key for Control Voltage On
(pre-assigned by HEIDENHAIN)
X14 Connection for the NC start key
(pre-assigned by HEIDENHAIN)
X15 Connection for the NC stop key
(pre-assigned by HEIDENHAIN)
X101 24 V NC power supply 323
Protective ground
X7
X6
X31
X30
X101
X101
X10
X500
X502
X23
X14
X15
If the key information is needed for external systems that are supplied with
24 V PLC, HEIDENHAIN recommends forwarding the information through
the PLC program and a normal PLC output.
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