HEIDENHAIN TNC 370 D, Technical Information

Page: 42 / 92

X23 Power supply at the analog inputs
Terminal Assignment
1 +24 Vdc (IEC 742 EN 50 178, 5.88 low-voltage electrical separation)
2 0 V
X19,X20,X21,X22 Connection for Pt 100 on the PL 410 B
Terminal Assignment
1 I + Constant current for Pt 100
2 U + Measuring input for Pt 100
3 U – Measuring input for Pt 100
4 I – Constant current for Pt 100
5 Shield
Connection to the analog inputs
Connecting cable 2 x 0.14 mm
2
shielded, max. 50 m.
Connection to the inputs for Pt 100 thermistors
The connection to the Pt 100 thermistors must be arranged as a four-wire circuit.
e.g. PL 410 B X19:
1
2
4
5
Measuring input U+
Measuring input U–
→
I+
→
I–
Pt100 Customer´s cable
4 x 0.14 mm
2
screened, max 50 m
3
July 02 Mounting and Electrical Installation TNC 370 D 3–39