24

Mechanical pressure switches

Principal technical data

Principal technical data

Valid for all pressure of the DCM, VCM, DNM, DWR, DGM, DNS and DDCM series that have a microswitch.

The technical data of type-tested units may differ slightly (please refer to particular type sheet).

Ex-i-version

…500

Switch housing

Pressure connection

Switching function and

connection scheme

(applies only to version

with microswitch)

Switching capacity

Mounting position

Protection class

(in vertical position)

Explosion protection

Code

EC Type Examination

Certificate Number

Electrical connection

Cabel entry

Ambient temperature

Medium temperature

Relative humidity

Switching point

Hysteresis

Vacuum

Repetition accuracy

of switching points

Vibration resistance

Mechanical durability

(pressure sensor)

Electronical durability

(microswitch)

Isolation values

Oil and grease-free

Diecast aluminium GDAISi 12

G 1/2" external thread (pressure gauge

connection) and G 1/4" internal thread.

1/4" internal thread for DDCM differential

pressure switches

Floating changeover contact.

With rising pressure

single pole switching

from 3–1 to 3–2

max.: 100mA, 24VDC

min.: 2mA, 5VDC

Vertical

IP 65

II 1/2G Ex ia IIC T6 Ga/Gb

II 1/2D Ex ia IIIC T80 °C

IBExU12ATEX1040

Terminal connection

M 16 x 1.5

–25 to +60 °C (exceptions:

DWAM, DWAMV, SDBAM series –20 to +60 °C

DGM and FD series: –25 to +60 °C

DCM4016, 4025, 1000, VCM4156: –15 to +60 °C)

Max. 60 °C

15 to 95 % (non-condensing)

After removing switch housing cover

Not adjustable

Diecast aluminium GDAISi 12

G 1/2" external thread (pressure gauge connection)

and G 1/4" internal thread.

1/4" internal thread for DDCM differential pressure

switches

Floating changeover contact.

With rising pressure

single pole switching

from 3–1 to 3–2

3 A at 250 VAC

2 A at 250 VAC inductive

3 A at 24 VDC

0.1 A at 250 VDC

min. 2 mA, 24 VDC

Vertical

IP 65

II 2G Ex d e IIC T6 Gb

II 1/2D Ex ta/tb IIIC T80 °C Da/Db

IBExU12ATEX1040

Terminal connection

M 16 x 1.5

–20 to +60 °C

Max. 60 °C

15 to 95 % (non-condensing)

After removing switch housing cover

Not adjustable

Higher medium temperatures are possible provided the above limits for the switching device are

ensured by suitable measures (e.g. siphon). All pressure switches can operate under vacuum.

This will not damage the device.

< 1 % of the working range (for pressure ranges > 1 bar).

No significant deviations up to 4 g.

With sinusoidal pressure application and room temperature, 10 x 106 switching cycles. The expected life

depends to a very large extent on the type of pressure application, therefore this figure can serve only as

a rough estimate. With pulsating pressure or pressure impacts in hydraulic systems, pressure surge

reduction is recommended.

100.000 switching cycles at nominal current 8 A, 250 VAC.

A reduced contact load increases the number of possible switching cycles.

Overvoltage category III, contamination class 3, reference surge voltage 4000 V.

Conformity to DIN VDE 0110 is confirmed.

The parts of all pressure switches in contact with the medium are oil and grease-free

(except the HCD…and DPS…series). The sensors are hermetically sealed and contain no seals

(also see ZF1979, special packing).

version (Ex-d)

…700