6742-30 HERGA, 6742-30 Datasheet - Page 13

• Manufacturer Part Number: 6742-30
• Description: PRESSURE SWITCH
• Manufacturer: HERGA

Specifications of 6742-30

• Connection Size: 0.125"
• Contact Configuration: DPCO
• Contact Current Ac Max: 21A
• Contact Voltage Ac Max: 250V
• External Depth: 43mm
• External Diameter: 43mm
• External Length / Height: 58mm
• External Width: 40mm

6753 ~ Low Air Pressure / Vacuum Switches
6753 Pressure Switch Range
For very sensitive pressure, vacuum and differential pressure switching.
The 6753 range of switches provide a high specification in a small, versatile body shell. Great care has been taken in the switch unit design, keeping
the moving mass and therefore inertia to a minimum. This means that it can operate at a high cycle rate with low pressure, vacuum or pressure
differential. This design feature can be used when measuring pressure pulses such as on component counting applications and used with herga Safe
Edges. The switch will operate very rapidly keeping the switch delay to a minimum.
1) For good repeatable switching, the contacts are gold plated on solid silver. The electrical rating of the switch is dependent on the contact pressure.
2) The standard switch can be adjusted to give normally closed or normally open contacts depending on the application. For operation on pressure
3) A separate version, (see bleed options), is provided with adjustable air bleeds on both sides of the diaphragm. These air bleeds are adjusted to
1999
As a consequence of our policy of continual improvement, we reserve the right to change without notice any detail in this publication. Please see our Conditions of Sale.
Technical Data
Pressure/Vacuum range minimum 25mm (1 in) Wg
Maximum Differential
Pressure
Standard Factory Setting
Maximum Differential Between
Pressure Connection
Body Withstand Pressure
Air Bleed Version
Flow Rate Litre / Min
Connection Position
Pressure Connection
Connecting Tube Reference
Temperature Range
This pressure is dependent on the air pressure. Thus, for very sensitive setting the permissible switching current will be lower than normal.
with normally closed contacts, connect to air connection ‘A’ and screw in sensitivity adjusting screw ‘S’ until contacts are normally closed. For
operation on pressure with normally open contacts, connect to air connection ‘B’ and set with contacts normally open.
a level which is suitable for most applications involving safe edges or elbows, and prevent pressure or vacuum building up inside when the
ambient temperature or atmospheric pressure changes.
maximum 400mm (16 ins) Wg
FOR FURTHER INFORMATION TEL: [phone] FAX: [phone]
400mm (16 ins) Wg
50mm (2.25 ins) Wg
(Contacts Normally Open) Other
settings available see note
0.34 Bar (5 PSI)
1.0 Bar (14.7 PSI)
See choice options 3 & 4, other
settings available, see note
Standard 100 - 300 cc/Min
@ 5 PSI
Base
4mm dia spouts
For reducing connectors, please
refer to accessories page
2311-08 or 2311-01
-5˚C to 50˚C
see note
2)
2)
3)
Electrical Data
Switch
Contact Rating Maximum
Dry Switching Minimum Current
Body
Diaphragm
Contacts
Contact Resistance
Mechanical Life
Weight (grams)
Single pole, N/Open / N/Closed
5mA 4V dc
Glass filled nylon 12
Neoprene
Gold plated silver mounted on
phosphor-bronze blades
0.05 Ohms
1 x 10
10grms
(Maximum ratings may not be
achieved at low pressure
6
0.5A RES 250V ac
cycles
settings)
ISSUE 01