Differential Common Mode Filter Diag; Common Mode Filter Diagram; Differential Mode Filter Diagram - Watlow Ramping and Profiling Microprocessor-Based Control SERIES 1500 User Manual

Noise Suppression Devices Available from Watlow
Watlow Winona stocks a few key noise suppression parts. You may order these by
calling your local Watlow distributor.
Item
Common Mode Line Filter
Differential Mode Line Filter
Metal Oxide Varistor
MOV
MOV
MOV
Line Filtering Configurations for Controls
These three diagrams show you filter configurations for removing input power noise.
Choose the one best suited for your system if you are unsure which one to use, see
Figure 12.
For very dirty or critical application - use micro-computer-regulated power
supply or Uninterruptable Power Supply (U.P.S.)
D.M. Line Filter
L1
Line
L2
Ground
k
L1
C.M. Line Filter
L2
Line
Ground
k
2
L1
L2
C.M. Line Filter
Ground
Installation - Wiring, Chapter 3
Electrical Ratings
250V, 3 Amp
Refer to the islatrol listing above.
150V, 80 Joule
130V, 38 Joule
275V, 75 Joule
275V, 140 Joule
Load
2
Load
D.M. Line Filter
Line
mov
Part Number
0804-0196-0000
0802-0273-0000
0802-0304-0000
0802-0266-0000
0802-0405-0000
k
1
Shield
k
1
Shield
Load
WATLOW Series 1500 User's Manual
Installation-Wiring
Table 4 -
Noise Suppres-
sion Device
Ratings
1
Keep filters 12
inches or less from
the control. Mini-
mize the line
distance where
noise can be re-
introduced to
control.
2
To prevent ground
loops do not fasten
common mode line
filters or filters with
metal cases to metal
that is at ground
potential. Doing so
will reduce filter
effectiveness.
Figure 10 -
Control
Differential Mode
Filter Diagram
Figure 11 -
Control Common Mode
Filter Diagram
k
1
Figure 12 -
Combination
Differential-
Common Mode
Filter Diagram
31