MDS Mechanical Pressure Switch

Mechanical Pressure Switches with adjustable switching output for monitoring pneumatic or hydraulic pressure

§ Robust and compact unit § Adjustable switching point § High precision § Up to 5076 psi (350 bar) max. working pressure (more upon request) § Electromechanical signal transducer § M12 and M3 plug connection per DIN EN 175301-803 § Changeover contact function § Long life

DA 13 0203 06/2012 Page 1/6

Buhler Technologies LLC 1030 West Hamlin Road, Rochester Hills, MI 48309 Phone: 248.652.1546 Fax: 248.652.1598 Internet: www.buhlertech.com e-mail: [email protected]

Technical Specifications MDS Series Mediums

self-lubricating fluids like hydraulic oils and lubricants, compressed air

Mounting position Response

Process connection Gasket seal Fastening torque

G1/8” G1/4” according to DIN3852-E 20 Nm (177 lbf-in) 25 Nm (221 lbf-in)

Switching point Accuracy

Measuring principle

Membrane spring-loaded

Max. operating pressure

Plunger spring-loaded

≤232.1 psi (16 bar) ≤232.1 psi (16 bar) 870.2 psi (60 bar) 5076.3 psi (350 bar)

Materials Gasket Housing

Membrane: NBR Plunger: steel --PTFE, NBR Steel, galvanised steel, galvanised

Switching output Number Switching element

Changer 1 micro switch with silver plated contacts 100/min M3 M12 2A 2A 4A ---

Max. switching frequency Switching power with plug DC to 28 V AC to 250 V

any min. velocity of pressure rise 0.1 psi/s (0.01 bar/s)

Reproducibility

± 2% of range value at room temperature same as accuracy

Ambient conditions Temperature range Environment / operation Vibration resistance Shock resistance

-4...176°F (-20... +80°C) A-10G / 10-500 Hz I-100G/6 ms

Weight

0.3 lb (0,15 kg)

Switch-back difference Plunger type

70

900

60

800

Hysteresis (psi)

40

H min H max

30 20

600 500 400 300

10

200

43,5

72,5

101,5

130,5

159,5

188,5

217,5

100

Switching point (psi)

Plug connection Max. voltage Protection class Cable fitting

725

1450

2175

2900

3625

Switching point (psi)

M3 (DIN EN 175301-803) 3 pol. + PE 250V IP65 PG9

M12 (socket) 4 pol. 28V IP67** **when connected

Pin assignment

p

DA 13 0203 06/2012 Page 2/6

3

4

2

2

1

p

1

4350

F001007

0 14,5

H min H max

700

50

F001007

Hysteresis (psi)

Membrane Type

Dimensions in mm Version M3

GL

Version M12

G GL 1/8 0.39 in 1/4 0.47 in

G

F000648

Accessories:

Part no.: 9144050047 Connecting cable M12x1, 4-pin, L = 5 m (195 in) Part no.: 9146100159 Contact box M12x1, 90° angle

Product code for MDS MDS -

-

-

Pressure ranges Setting of switching point 1) (optional)

Model Connector M3 or M12 Fluid Port G1/8” or G1/4”

1)

Pressure ranges 8: 0.5...8 bar (7.3...116 psi) 16: 1...16 bar (14.5...232 psi) 120: 10...120 bar (145...1740 psi) 250: 20...250 bar (290...3625 psi) 320: 30...320 bar (435...4640 psi)

Membrane pressure switch Membrane pressure switch Piston pressure switch Piston pressure switch Piston pressure switch

If required, the switching point setting can be executed by the factory. The switching point must be set for rising or falling pressure, i.e. switching point monitoring of 0 bar to switching point (rising) or from max. operating pressure decreasing to switching point (falling). Refer to the following example for the circuitry: MDS-M3-G1/4-120-80R (switching point 80 bar (1160 psi) rising) PIN3-2 closed when switching point is reached MDS-M3-G1/4-120-80F (switching point 80 bar (1160 psi) falling) PIN3-1 closed when switching point is reached

DA 13 0203 06/2012 Page 3/6

we reserve the right to amend specifications

Technical Specifications MDSM & MDSK Series Mediums

MDSM Neutral fluids, compressed air

Process connection

G1/4” inside

Mounting position Measuring principle Max. operating pressure Min. velocity of pressure rise Switching point Accuracy/reproduciblity

any Spring-loaded membrane 870.2 psi (60 bar) 0.1 psi/s (0.01 bar/s)

MDSK self-lubricating fluids such as hydraulic oils and lubricants G 1/4” rotary, vertical flange DIN ISO 16873 Fastening torque: 25 Nm any Spring-loaded piston 5076.3 psi (350 bar) 0.1 psi/s (0.01 bar/s)

± 2% of range value at room temperature

± 2% of range value at room temperature

Materials Measuring element Pressure connection

membrane: NBR zinc die cast (G1/4” inside)

Housing

zinc die cast

piston: stainless steel 1.4305 galvanised steel (G1/4” rotary), zinc die cast (vertical flange) zinc die cast

Switching output Number Switching element Max. switching frequency Max. switching power with plug DC to 28V AC to 250V

Changer 1, adjustable with lock micro switch with silver plated contacts 200 / min.

Changer 1, adjustable with lock micro switch with silver plated contacts 200 / min.

M3 3A 6A

M3 3A 6A

Ambient conditions Temperature range Environment/operation Vibration resistance Shock resistance

14...176 °F (-10 °C...+80 °C) A-10G/10-500 Hz I-100G/6 ms

14...176 °F (-10 °C...+80 °C) A-10G/10-500 Hz I-100G/6 ms

Weight

0.7 lb (0,3 kg)

0.7 lb (0,33 kg)

M12 3A ---

M12 3A ---

Switch-back difference: MDSK

MDSM 20,00 400

14,00 12,00

MDSM 16 MDSM 8 MDSM 2

10,00 8,00 6,00 4,00 2,00 0,00 43,50

87,00

130,50

174,00

217,50

350 300 250 200 150 100 0

725

Switching point (psi)

Plug connection Max. voltage Protection class Cable fitting

1450

2175

2900

3625

4350

Switching point (psi)

M3 (DIN EN 175301-803) 3 pol. + PE 250V IP65 PG9

M12 (Socket) 4 pol. 28V IP67** **when connected

Pin assignment DA 13 0203 06/2012 Page 4/6

3

2

p

1

4

2

p

1

F001006

Switch-back difference (psi)

16,00

F001007

Switch-back difference (psi)

18,00

Dimensions in mm MDSM

Version M12

Version M3 Contact box included

Female thread fixed Female thread fixed

MDSK Version M3 Contact box included

G GL 1/4 0.47 in Male thread twistable

Version M12

Vertical flange DIN ISO 16873

Male thread twistable

Accessories: DA 13 0203 06/2012 Page 5/6

Art-Nr.: 9144050047 Connecting cable M1 2x1, 4-pin plug, L = 5m (195 in) Art-Nr.: 9146100159 Contact box M1 2x1, 90° angle Art-Nr.: 9008429 Double nipple G1/4, stainless steel we reserve the right to amend specifications

Product code MDS

-

-

-

-

Model M MDSM K MDSK

Pressure ranges Setting of switching point 1)

Plug connection M3 or M12

Pressure ranges 8 : 0,5...8 bar 16: 1...16 bar 120: 10...120 bar 250: 20...250 bar 320: 30...320 bar

G1/4i G1/4” inside (MDSM only) G1/4d G1/4” twistable (MDSK only) VF Vertical flange per ISO 16873 (MDSK only)

1)

(7.3...116 psi) (14.5...232 psi) (145...1740 psi) (290...3625 psi) (435...4640 psi)

MDSM MDSM MDSK MDSK MDSK

If required, the switching point setting can be executed by the factory. The switching point must be set for rising or falling pressure, i.e. switching point monitoring of 0 bar to switching point (rising) or from max. operating pressure decreasing to switching point (falling). Refer to the following example for the circuitry: MDSK-M3-G1/4-120-80R (switching point 80 bar rising) PIN1-3 closed when switching point is reached MDSK-M3-G1/4-120-80F (switching point 80 bar falling) PIN1-2 closed when switching point is reached

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