Pressure switch MDR 21

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Pressure switch MDR 21

Product catalog summary

Technical Specifications:

Rated Insulation Voltage (Ui): 500 V
Motor Switching Capacity:
- 120 V (1~): 2 HP
- 240 V (1~): 3 HP
- AC 3 Cycles: 2.2 kW
Electrical Life (AC 3): > 100,000 cycles
Mechanical Life: > 5,000,000 cycles
Max Electrical Cycles: 120 cycles/h
Max Mechanical Cycles: 600 cycles/h
Rated Operational Current (Ie): 17 A at 240 V AC / 24 A at 120 V AC
Bursting Strength: > 35 bar
Permissible Medium Temperature:
- Air: -5 to +80 °C
- Water: +80 °C
Degree of Protection: IP 44
Conductor Cross-Section: Fine stranded and rigid cable: 2.5 mm²

Product Features:

Single phase
Switching capacity: 2.2 kW / 3 HP
Max cut-out pressure: 12 bar / 175 psi
2-pole (normally closed)
Compliance: EN 60947, UL/CSA approved
Flange material: Die-cast aluminium

Accessories:

Unloader Valves:
- EV 2: Screw connection for 6 mm tubes
- EV 2s: Quick-connect for 6 mm tubes
- EV 2W/EV 2Wi: 90° screw connection for 6 mm or 1/4" tubes
Delayed Unloader Valves:
- AEV 2: Screw connection for 6 mm tubes
- AEV 2s: Quick-connect for 6 mm tubes
- AEV 2W/AEV 2Wi: 90° screw connection for 6 mm or 1/4" tubes
Cable Glands:
- WN Grommet
- PG 13.5 Z-21: With strain relief
- PG 13.5 ZK-21: With strain relief and cable support
Covers:
- H 21: Without On/Off lever
- H 21-EA: With On/Off lever

Ordering Information:

Various models available with different pressure ranges and flange types, detailed in the document.

Catalog excerpts

Pressure switch MDR 21Pressure switch MDR 21 Single phase Switching capacity 2.2 kW / 3 HP Max. cut-out pressure 12 bar / 175 psi 2-pole (N.C.) Acc. to EN 60947 uL / CsA-approval Flange = die-cast aluminium Technical data MDR 21 nach EN 60947 uL/CsA diaphragm media resistance MDR 21 A detailed overview of diaphragm media resistance for all pressure switches can be found on page 22. Please read the information carefully. order reference Unloader valves and cable glands for retrofitting, see accessories!

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* only for pneumatic tubes with outside tolerances according to e. g. Festo PAN 6x1mm High performance Pressure switches Unloader valves / Delayed unloader valves EV

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