HEIDENHAIN iTNC 530 Service Manual page 198

X6: Pin layout at X6 (power supply for PLC outputs):
Power supply for
the PLC outputs on
Terminal
PLD 16-8 input/
9
output module
10
X15 to X18:
Analog input on
PLA 4-4 analog
Connecting
module
terminals
1
2
3
X19 to X22:
Connection for
Pt 100 on the
Connecting
PLA 4-4 analog
terminals
module
1
2
3
4
5
Connecting the Characteristics of the connecting cable:
analog voltage
Connection of the 
Pt 100 thermistors
13 – 198
Note
If you use only the outputs at X6 for a PLD 16-8 I/O unit (and no inputs), the 0-V connection
for supplying the electronics and for operating the LEDs must be established at X4 or X5.
The iTNC 530 cyclically monitors the PLC outputs of the PL510 for a short circuit.
Assignment
+24 Vdc (20.4 V to 28.8 V) for group 1 (O1 ... O4)
+24 Vdc (20.4 V to 28.8 V) for group 2 (O5 ... O8)
Assignment
–10 V to +10 V
0 V (reference potential)
Shield
Note
The interfaces comply with the requirements of EN 50 178 for "low voltage electrical
separation."
Assignment
I + Constant current for Pt 100
U + Measuring input for Pt 100
U– Measuring input for Pt 100
I– Constant current for Pt 100
Shield
Note
The interfaces comply with the requirements of EN 50 178 for "low voltage electrical
separation."
Shielding
2 conductors with 0.14 mm²
Maximum length 50 meters
Configure the thermistor connection as a "four-conductor circuit":
HEIDENHAIN Service Manual iTNC 530