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

C h a p t e r 2 : I n s t a l l a n d W i r e
■
1 2
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Wa t l o w S e r i e s N 7
Ó
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.
Process Inputs
• Voltage: 0 to 10VÎ (dc)
• Current: 0 to 20 mA
• Voltage input impedance: 50 k
Ω
• Current input impedance: 100
Ω
1
2
34
5
6 Common
–
4
5 Current
+
6
Voltage
+
Figure 12d — Input 4
Input 3 1
2
3
4
5
6
Input 4
1
2
3
456
Common
–
1
2 Current
+
3
Voltage
+
Figure 12c — Input 3
1
2
3
456
Common
–
6
5 Current
+
4 Voltage
+
Figure 12b — Input 2
Input 2 1
2
3
4
5
6 6
5
4
3
2
1
Input 1
1
2
3
456
Voltage
+
3
2 Current
1
–
Common
+
Figure 12a — Input 1