HEIDENHAIN TNC 426 PB/M Technical Manual page 130

X48: Analog input
(PLC) on the logic
unit
X15 to X18: Analog
input on the
PL 410B
3 – 48
Pin layout:
Warning
Remember to connect the analog inputs with the correct polarity!
Note
The interface complies with the requirements of EN 50 178 for "low
voltage electrical separation."
D-sub connection
(female) 25-pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20 to 25
Housing
Pin layout:
Connecting
terminals
1
2
3
Assignment
I + Constant current for Pt 100
1
I – Constant current for Pt 100
1
U + Measuring input for Pt 100
1
U – Measuring input for Pt 100
1
I + Constant current for Pt 100
2
I – Constant current for Pt 100
2
U + Measuring input for Pt 100
2
U – Measuring input for Pt 100
2
I + Constant current for Pt 100
3
I – Constant current for Pt 100
3
U + Measuring input for Pt 100
3
U – Measuring input for Pt 100
3
Do not assign
Analog input 1: –10 V to +10 V
Analog input 1: 0 V (reference potential)
Analog input 2: –10 V to +10 V
Analog input 2: 0 V (reference potential)
Analog input 3: –10 V to +10 V
Analog input 3: 0 V (reference potential)
Do not assign
External shield
Assignment
-10 V to +10 V
0 V (reference potential)
Shield
HEIDENHAIN Technical Manual TNC 426, TNC 430