Connection To The Analog Inputs - HEIDENHAIN TNC 426 PB/M Technical Manual

X19 to X22:
Connection for Pt
100 on the PL 410B
Connection to the
analog inputs
Connection to the
inputs for Pt 100
thermistors
December 2001
Pin layout:
Note
The interface complies with the requirements of EN 50 178 for "low
voltage electrical separation."
Connecting
terminals
1
2
3
4
5
Characteristics of the connecting cable:
n
Shielding
n
2 conductors with 0.14 mm
n
Maximum length 50 meters
7 7 7 7 Configure the thermistor connection as a "four-conductor circuit."
Pt100
Analog Input
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
2
each
I+
Measuring input U+
Measuring input U–
I–
Customer´s cable
2
4 x 0.14 mm screened, max 50 m
1
2
3
4
5
3 – 49