Watlow Series 93 - Manual (Page 11)

W a t l o w S e r i e s 9 3 I n s t a l l a n d W i r e ■ 2 . 5
Figure 2.5a – 0-5VÎ (dc) Process
Input impedance: 10k
Ω
Figure 2.5b – 4-20mA Process
Input impedance: 5
Ω
Figure 2.5c – 4-20mA Process: 2-Wire Transmitters
+
+
+
- -
-
2
5
Transmitter
Power
Supply
DIP Switch Orientation
O
N 1 2
+
- 2
5
Amperes dc
DIP Switch Orientation
O
N 1 2
Volts dc
+
-
3
5
Install and Wire
NOTE:
Successful installa-
tion requires four
steps:
• Choose the con-
troller’s hardware
configuration and
model number
(Appendix);
• Choose a sensor
(Chapter Two and
Appendix);
• Install and wire the
controller (Chapter
Two);
• Configure the con-
troller (Chapters
Three, Four and
Five).
ç
WARNING: To avoid
damage to property
and equipment,
and/or injury or loss
of life, use National
Electric Code (NEC)
standard wiring prac-
tices to install and
operate the Series
93. Failure to do so
could result in such
damage, and/or
injury or death.
NOTE:
When an external
device with a non-
isolated circuit com-
mon is connected to
the 4-20mA or dc out-
put, you must use an
isolated or unground-
ed thermocouple.
ç
CAUTION: Process
input does not have
sensor break protec-
tion. Outputs can
remain full on.