03.06
6.1 NCU terminal block 6FC5211-0AA00-0AA0
6-74
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D Configuring Manual NCU (PHD) – 03.06 Edition
+5 V monitoring
Temperature monitoring 60° C"3°C
Configuration monitoring
Sign-of-life monitoring (watchdog) of the microcontroller
Sign-of-life monitoring of the NC
Error Acquisition Effect
Undervoltage
(< 4.75 V)
Limit monitor Disabling of the NC outputs, LED
(green) off
Ambient temperature Temperature sensor Status signal to NC,
screen display
Sign of life NCU Cyclic signaling Disabling of the NC outputs, LED
(red) on
Watchdog Timing Disabling of the NC outputs, LED
(red) on
Hardware combination Hardware configura-
tion
Disabling of the NC outputs LED
(red, yellow) an,
status signal to NC
The binary and analog outputs are switched to a safe state (0 V at the output)
with the XOUTDS signal in the event of disturbances or faults in the NCU, the
microcontroller, and power failure.
DC 24 V (20.4 V DC to 28.8 V DC)
Connector designation: X9
Connector type: 4-pole terminal block, 2.5 mm
2
Terminal
Table 6-1 X9 pin assignments
X9
Pin Name Type
1 P24 ext VI
2 P24 ext VI
3 M24 ext VI
4 M24 ext VI
Note
Pins 1 and 2 or 3 and 4 are bridged in a group on the module.
Signal names
P24 ext +24 V power supply external
M24 ext Power supply ground external
Signal type
VI Voltage Input
Monitoring
Power supply
6 Terminal Block
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