Bourdon tube pressure switch with infinitely variable switching pressure differential

Transcription

1 Bourdon tube pressure switch with infinitely variable switching pressure differential RE 00/06. Replaces: 0.0 /8 Type HED Component series X Maximum operating pressure 00 bar CCC TB0008 Table of contents Contents Page Features Ordering code Plug-in connectors Function, section, symbol Technical data Unit dimensions, 6 Pin assignment 7 Circuit examples 7 Features Indicator lamp, optional Electrical connection Cable gland Plug-in connector Lockable cap, optional

2 /8 Bosch Rexroth AG Hydraulics HED RE 00/06. Ordering code HED OA X * Bourdon tube pressure switch Component series 0 to 9 = X (0 to 9: unchanged installation and connection dimensions) Pressure range max. bar = Pressure range max. 6 bar = 6 Pressure range max. 00 bar = 00 Pressure range max. 00 bar = 00 Pressure range max. 00 bar = 00 ) Plug-in connectors, separate order, see below. No code = Q = No code = L = L0 = L0 = No code = K ) = K6 ) = Further details in clear text Without lockable cap With lockable cap Without Indicator lamp Indicator lamp for V (0 V to V) Indicator lamp for 0 V (90 V to 0 V) Indicator lamp for 0 V (80 V to 0 V) Electrical connection Cable gland Plug-in connection -pin + PE Plug-in connection 6-pin + PE Plug-in connectors Plug-in connector -pin + PE Plug-in connector 6-pin + PE; EN Pg Pg Colour: red Colour: grey for connection K Material no. R for connection K6 Material no. R

3 RE 00/06. HED Hydraulics Bosch Rexroth AG /8 Function, section, symbol Hydro-electric pressure switches of type HED are Bourdon tube pressure switches. They basically consist of housing (), Bourdon tube () with actuating lever (), micro-switch () and two adjustment elements (). Pressure switches assume the task of opening or closing an electrical circuit in dependence upon pressure. The pressure to be monitored acts on Bourdon tube (). Bourdon tube () bends, and actuating lever () fixed to it transmits the movement of Bourdon tube () to micro-switch (). This causes the electrical circuit to open or close depending on the circuit setup. When the pressure continues to increase, Bourdon tube () bends further, which causes actuating lever () to operate the second micro-switch and to open or close the electrical circuit depending on the circuit set-up. Adjustment of the switching pressure The two switching pressures required, which are determined by the position of the micro-switches, can be adjusted separately and independently of each other on two adjustment elements (). When a switching relay is used, the switching pressure differential is infinitely variable. Symbols Without Indicator lamp With Indicator lamp P P P

4 /8 Bosch Rexroth AG Hydraulics HED RE 00/06. Technical data (for applications outside these parameters, please consult us!) General Weight kg 0.8 Installation position Optional Ambient temperature range C 0 to +0 (NBR seals) Conformity CCC EN 608-:99, IEC Hydraulic Pressure range Maximum operating pressure (briefly) bar Switching pressure differential ) bar to. to 9 to 9 0 to 90 to 80 Falling pressure minimum bar maximum bar Increasing pressure minimum bar. 8 0 maximum bar Hydraulic fluid Mineral oil (HL, HLP) to DIN ; fast bio-degradable hydraulic fluids to VDMA 68 (see also data sheet 90); HETG (rape seed oil); other hydraulic fluids on enquiry Hydraulic fluid temperature range C 0 to +80 (NBR seals) Viscosity range mm /s 0 to 800 Max. permissible degree of contamination of the hydraulic fluid - cleanliness class to ISO 06 (c) Class 0/8/ ) Electrical Contact assignment AC voltage V AC 0 V; A DC voltage V DC 0 V; A In the case of DC voltage with inductive load, provide a spark suppressor to prolong the service life. Maximum switching frequency /h 800 Switching accuracy (repeatability) aprox. ± % of set pressure Long-term drift of switching point load cycles approx. + % of max. set pressure load cycles ) approx. +0 % of max. set pressure Type of protection to EN 609 IP 6 with plug-in connector mounted and locked Electrical connection Cable gland Pg Plug-in connector Pg Maximum cable Cable gland mm. cross-section Plug-in connector mm. ) Constant over the entire adjustment range ) The cleanliness classes specified for components must be adhered to in hydraulic systems. Effective filtration prevents malfunction and, at the same time, prolongs the service life of components. For the selection of filters, see ) It is not possible to make any statements for long-term drift above load cycles. Notes: Use of the pressure switch Bourdon tube pressure switches may only exposed to dampened mechanical vibration (mounting with rubber buffers). To compensate for pump pulsation, we recommend that the pressure switch be connected by means of minimess hoses (DN approx. mm, min. length meter). Switching pressure differential To ensure the reliability of the switching signal, the actual pressure differential obtained must be greater than the existing switching pressure differential of the pressure switch. Long-term drift of switching points Because the set switching point may change over the lifetime, the pressure switch is not suitable for use in safety applications.

5 RE 00/06. HED Hydraulics Bosch Rexroth AG /8 Unit dimensions (dimensions in mm), Pg 7 7 0, G/;., 0,,, Set screw, self-locking, for switch minimum switching pressure. Set screw, self-locking, for switch maximum switching pressure Pressure port P Nameplate Lockable cap, optional (spare key, material no. R , separate order) Space required to remove key 6 fixing holes 7 Electrical connection via cable gland Pg

6 6/8 Bosch Rexroth AG Hydraulics HED RE 00/06. Unit dimensions: Electrical connection (dimensions in mm) HED OAX/.K.. HED OAX/.K6.. Pg 66 7 ca. Pg ca. 0 8,, HED OAX/.KL Pg 7 ca. HED OAX/.K6L.. Pg 67 ca. 0 8,, HED OAX/.L.. Pg Indicator lamp Can be rotated in 0 increments around the plug-in axis Dimension to remove plug-in connector Plug-in connector, red Plug-in connector, grey 0

7 RE 00/06. HED Hydraulics Bosch Rexroth AG 7/8 Pin assignment Connection K PE Connection K with indicator lamp L... PE Connection K6 PE 6 Connection K6 with indicator lamp L... PE 6 Connect indicator lamp according to the desired circuit Circuit examples min. ) ) max. R(P) min. ) ) max. R(P) ) ) S(N) ) ) S(N) Differential circuit with N/O contact ( x HED ) Differential circuit with N/C contact ( x HED ) ) Pressure switch ) Pressure switch ) Indicator lamp ) Operating relay

8 8/8 Bosch Rexroth AG Hydraulics HED RE 00/06. Notes Bosch Rexroth AG Hydraulics Zum Eisengießer 9786 Lohr am Main, Germany Phone +9 (0) 9 / 8-0 documentation@boschrexroth.de This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging.