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FEMA Ex-DCM/Ex-DNM | ATEX Overpressure Switches | ATEX + IECEx, -20 to 60 °C, SIL 2
FEMA Ex-DCM and Ex-DNM switches are the explosion-protected versions of the DCM/DNM overpressure range for mechanical engineering, pneumatics and hydraulics. They are certified IBExU12ATEX1040 to ATEX 2014/34/EU and IECEx IBE 14.0077, and are rated for -20 to 60 °C ambient. Ex-DCM types have a fixed switching differential, Ex-DNM types an adjustable one.
Key features
- SPDT microswitch, 2 A inductive / 3 A resistive
- G1/4 internal / G1/2 external pressure connection
- Calibrated for falling pressure; the reset point is higher by the switching differential
- Die-cast aluminium GD AlSi12 housing, seawater resistant
- SIL 2 according to IEC 61508-2
- Specifications
| Series code | EX-DCM-EX-DNM-SERIES |
| Brand | FEMA |
| Series | Ex-DCM (fixed) / Ex-DNM (adjustable differential) |
| Pressure Type | Overpressure (relative) |
| Ambient Temperature | -20 to 60 °C |
| Process Connection | G1/4 internal, G1/2 external |
| Switch | SPDT microswitch, 2 A inductive / 3 A resistive |
| Ex Approvals | IBExU12ATEX1040 (ATEX 2014/34/EU); IECEx IBE 14.0077 |
| Safety Rating | SIL 2 (IEC 61508-2) |
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