28 – 458 HEIDENHAIN Service Manual iTNC 530 HSCI
X101:
NC power supply
The MC is supplied with +24 V NC (control voltage) of the machine, for example by the PSL 130,
or by the integrated 24 V power supply unit of the UEC 11x.
Protective Extra Low Voltage (PELV) according to EN 61800-5-1 must be complied with for the
+24 V NC power supply.
Power supply: Minimum absolute value: +20.4 V–
Maximum absolute value +28.8 V–
Pin layout:
Power consumption and efficiency:
X121:
PROFIBUS
connection
Pin layout on X121 of the MC main computer or IPC and on X1 of the PLB 550 PROFIBUS slave
All signals on the PL 550 are electrically isolated.
All signals are electrically isolated at X121 of the MC 6xxx main computer or the IPC 6xxx.
The +5 V and GND pins supply the terminating resistor in the connector.
Connecting terminals at X101 Assignment
++24 V NC
–0 V NC
Ensure that either the DC-link power supply unit is switched off or the line power is disconnected
before connecting the power cables!
Device Power consumption Efficiency
MC 6241 40 W 85 %
MC 6222 60 W
If USB components that are connected to X141/X142 require more than 0.5 A, a separate
power supply becomes necessary for these components. One possibility is the USB hub
from HEIDENHAIN.
Main computer X121 Connecting cable 515 845-01 PLB 550 X1
D-sub
connctn.
(female)
9-pin
Assignment D-sub
cnnctr.
(male)
9-pin
D-sub
cnnctr.
(male)
9-pin
X1 D-sub
cnnctn.
(female)
9-pin
Assignment
1 Do not assign 1 – 1 1 Do not assign
2 Do not assign 2 – 2 2 Do not assign
3 B line 3 B line 3 3 B line
4RTS
(signal type:
TTL)
4– 44 RTS
(signal type:
TTL)
5 GND 5 – 5 5 GND
6 +5V 6– 66 +5V
7 Do not assign 7 – 7 7 Do not assign
8 A line 8 A line 8 8 A line
9 Do not assign 9 – 9 9 Do not assign
Housing External shield Housing External shield Housing Housing External
shield