Differential pressure switch for air, flue and exhaust ... - fh-teknik a/s
Differential pressure switch for air, flue and exhaust ... - fh-teknik a/s
Differential pressure switch for air, flue and exhaust ... - fh-teknik a/s
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Functional description<br />
<strong>Differential</strong> <strong>pressure</strong> <strong>switch</strong> in <strong>pressure</strong><br />
<strong>and</strong> vacuum ranges.<br />
The differential <strong>pressure</strong> acts via the<br />
diaphragm against the <strong>for</strong>ce of the<br />
setting spring on the micro<strong>switch</strong>.<br />
The <strong>pressure</strong> <strong>switch</strong> operates without<br />
any auxiliary power.<br />
LGW…C2 differential <strong>pressure</strong><br />
<strong>switch</strong><br />
The control unit responds to differential<br />
<strong>pressure</strong>. If the set reference value<br />
(mbar) is exceeded or undershot, the<br />
circuit is <strong>switch</strong>ed on, off or over.<br />
Definition of <strong>switch</strong>ing difference Δp<br />
The <strong>switch</strong>ing difference Δp is the<br />
<strong>pressure</strong> difference between the<br />
upper <strong>and</strong> lower <strong>switch</strong>ing <strong>pressure</strong>s.<br />
Specifications<br />
Max. operating <strong>pressure</strong><br />
Pressure connection<br />
Temperature range<br />
Materials<br />
Switching voltage<br />
Nominal current<br />
Switching current<br />
Electrical connection<br />
Degree of protection<br />
Setting tolerance<br />
LGW…C2 <strong>switch</strong>ing function<br />
As <strong>pressure</strong> rises:<br />
1 NC opens, 2 NO closes<br />
As <strong>pressure</strong> falls:<br />
1 NC closes, 2 NO opens<br />
50 mbar (5 kPa)<br />
Pressure<br />
at meter<br />
Hose connecting piece suitable <strong>for</strong> hose ø 4 / ø 6<br />
Ambient temperature -15 °C to +85 °C<br />
Medium temperature -15 °C to +85 °C<br />
Storage temperature -30 °C to +85 °C<br />
COM<br />
Housing: polycarbonate<br />
Switch: polycarbonate<br />
Diaphragms: NBR<br />
Switching contact: st<strong>and</strong>ard: fine silver (Ag)<br />
optional: gold-plated fine silver (AU); suitable <strong>for</strong><br />
DDC applications: 24 V DC; 0.02 A<br />
Ag contact: AC eff. min. 10 V max. 250 V<br />
DC min. 12 V max. 48 V<br />
Au contact: DC min. 5 V max. 24 V<br />
Ag contact: AC eff. 5 A<br />
Au contact: DC 20 mA<br />
Ag contact: AC eff. max. 5 A at cos ϕ 1<br />
AC eff. max. 3 A at cos ϕ 0.6<br />
AC eff. min. 20 mA<br />
DC min. 20 mA max. 1 A<br />
Au contact: DC min. 5 mA max. 20 mA<br />
At screw terminals via PG* 11 cable gl<strong>and</strong> (* = heavy-gauge conduit thread)<br />
IP 54 as per IEC 529 (DIN 60 529), optional IP 65<br />
Switching difference Δp<br />
3 (P)<br />
Setting tolerance<br />
±15% <strong>switch</strong>ing point deviation referred to reference value<br />
adjusted as vertical diaphragm position, <strong>for</strong> <strong>pressure</strong> direction,<br />
refer to table on page 4.<br />
p<br />
Adjustment as<br />
<strong>pressure</strong> falls<br />
2<br />
1<br />
NO<br />
NC<br />
Upper <strong>switch</strong>ing<br />
<strong>pressure</strong><br />
Rising<br />
Falling<br />
Lower <strong>switch</strong>ing<br />
<strong>pressure</strong><br />
2 … 4
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