Watlow series l rev g - 02-12-08.pdf - Manual (Page 10)

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Warning: Use National Electric (NEC) or other country-spe-
cific standard wiring and safety practices when wiring and
connecting this controller to a power source and to electri-
cal sensors or peripheral devices. Failure to do so may
result in damage to equipment and property, and/or injury
or loss of life.
Note:
To prevent ground loops, maintain isolation from input to
output when using switched dc or analog process outputs.
Use ungrounded thermocouples.
C h a p t e r 2 : I n s t a l l a n d W i r e
■
1 0
■
Wa t l o w S e r i e s N 7
Thermocouple
• J and K: –46 to 316°C (–50 to 600°F)
• Input impedance: >100 k
Ω
1
2
34
5
6
4
5
+
–
Figure 10d — Input 4
Input 3 1
2
3
4
5
6
Input 4
1
2
34
5
6
1
2
+
–
Figure 10c — Input 3
1
2
34
5
6
4
5 –
+
Figure 10b — Input 2
Input 2 1
2
3
4
5
6 6
5
4
3
2
1
Input 1 1
2
3
456
2
1
–
+
Figure 10a — Input 1