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WATLOW DIN-A-MITE Style D User’s Manual 7
An external EMI filter must be used in conjunction with the
DIN-A-MITE for loads in excess of six amperes (6 A) at 150 to
250 kHz. Without a filter applied, the DIN-A-MITE does not
comply with the conducted emissions standard for loads more
than 6 A at 150 to 250 kHz.
Watlow has verified that two types of filters will suppress
electromagnetic interference (EMI) created by the DIN-A-
MITE power controller to within the CE requirements.
A tank filter supplied by Crydom or Watlow, installed across
the power lines, suppresses EMI on the power lines.
See Figures 1 and 2 below.
See Table 1 for the correct filter.
Table 1 — DIN-A-MITE EMI filters.
çWARNING:
The tank filters specified may suppress desirable communications
carried on power lines in the 150 to 250 kHz region. The filters may
suppress carrier current such as that used for infant monitors and
medical alert systems. Verify that suppressed carrier current or other
desirable communications on power lines creates no hazard to people
or property. Failure to observe this warning could result in damage to
property, and injury or death for personnel.
ÓWARNING:
All filter installation and wiring must be performed by qualified
personnel, and conform to local and national electrical codes. Failure
to observe this warning could result in damage to property, and injury
or death for personnel.
B
A
PE
1
2
DIN-A-MITE
Filter
Heater
Breaker or
fused disconnect
A protective earth (PE) connection
is required to minimize EMI.
B
A
PE
2
1
C
Filter
DIN-A-MITE No. 1
Breaker or
fused disconnect
Heater
DIN-A-MITE No. 2
A protective earth (PE) connection
is required.
2
1
Figure 1 — Tank filter, single-phase, 230VÅ (ac).
Figure 2 — Three-phase, 2-leg control using two (2) DIN-A-MITE D
controllers. Contactor input models (C and K) only.
Description Crydom Watlow
Filter Filter
Single-phase, 230VÅ (ac) 1F25 14-0019
Three-phase, 440VÅ (ac) 3F20 14-0020
Required External EMI Filters For DIN-A-MITE With More Than 6 A Loads