RE 50 060/02.03
Replaces: 07.02
Hydro-electric pressure switch
Type HED 8
H5546/96
Series 1X
Maximum operating pressure 630 bar
Type HED 8 OH1X/..K14S… with plug-in connector
Overview of contents
Contents
Features
Ordering details, preferred types
Function, section, symbol
Technical data
Characteristic curves (switching pressure differential)
Unit dimensions
Installation guidelines
Sandwich plates
Connection allocation
Circuit examples
Features
Page
1
2
3
4
5
6
7
8, 9
10
10
–
–
–
–
–
–
•
•
•
•
–
For subplate mounting
For pipe installation
As vertical stacking element to porting pattern DIN 24 340 J4
In horizontal stacking assemblies
5 pressure stages
4 adjustment elements:
Spindle with internal hexagon, with or without protective cap
(protective cap can be sealed)
Spindle with internal hexagon and scale,
with and without protective cap
Rotary knob with scale
Lockable rotary knob with scale
Plug-in connector with circuitry (indicator light)
(separate order)
© 2003
by Bosch Rexroth AG, Industrial Hydraulics, D-97813 Lohr am Main
All rights reserved. No part of this document may be reproduced or stored, processed, duplicated or circulated using
electronic systems, in any form or by any means, without the prior written authorisation of Bosch Rexroth AG.
In the event of contravention of the above provisions, the contravening party is obliged to pay compensation.
HED 8
1/10
RE 50 060/02.03
Ordering details
HED 8
1X
K14
*
Piston pressure switch
Vertical stacking systems
Subplate mounting
Pipe installation
1)
No code =
V=
= OH
= OP
= OA
Series 10 to 19
= 1X
(10 to 19: unchanged installation and connection dimensions)
Max. settable pressure 50 bar
Max. settable pressure 100 bar
Max. settable pressure 200 bar
Max. settable pressure 350 bar
Max. settable pressure 630 bar
NBR seals
FKM seals
(other seals on request)
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
= 50
= 100
= 200
= 350
= 630
Electrical connection type
Single connection; with component plug DIN 43 650-AM2,
Without plug-in connector
Further details in clear text
No code =
S=
A=
AS =
KS 3) =
KW =
= K14 2)
1)
Preferred types and standard components are
highlighted in the RPS (Standard Price list).
2)
3)
Spindle (without scale)
Spindle (without scale) with protective cap
Spindle with scale
Spindle with scale and protective cap
Lockable rotary knob with scale
Rotary knob with scale
Sandwich plate for vertical stacking assemblies (separate order,
see pages 8, 9)
Plug-in connector must be ordered separately (see below).
H-key with Material No. R900008158 is included within the scope
of supply.
Ordering details: plug-in connector to DIN 43 650 A and ISO 4400 for component plug "K14"
Material No.
Colour
Without circuitry
Black
R900052563
6 … 14 V
With circuitry (indicator light)
16 … 30 V
36 … 60 V
90 … 130 V
R900545844 R900545845
180 … 240 V
–
R900545846 R900545847 R900545848 R900001631
For further plug-in connector see RE 08 006
Preferred types: (readily available)
Material No.
Type
Material No.
Type
R900536027
HED 8 0A 1X/100K14
R900536058
HED 8 0A 1X/50K14KS
R900053690
HED 8 0A 1X/100K14A
R900536081
HED 8 0A 1X/50K14S
R900536063
HED 8 0A 1X/100K14KS
R900536045
HED 8 0H 1X/100K14
R900573428
HED 8 0A 1X/100K14KW
R900539655
HED 8 0H 1X/100K14S
R900539656
HED 8 0A 1X/100K14S
R900563879
HED 8 0H 1X/200K14
R900536599
HED 8 0A 1X/200K14
R900560124
HED 8 0H 1X/200K14S
R900565225
HED 8 0A 1X/200K14S
R900536098
HED 8 0H 1X/350K14S
R900536033
HED 8 0A 1X/350K14
R900536041
HED 8 0H 1X/50K14
R900083070
HED 8 0A 1X/350K14AS
R900536069
HED 8 0H 1X/50K14KS
R900571065
HED 8 0A 1X/350K14KW
R900536090
HED 8 0H 1X/50K14S
R900536086
HED 8 0A 1X/350K14S
R900565750
HED 8 0P 1X/100K14KS
R900536021
HED 8 0A 1X/50K14
R900571917
HED 8 0P 1X/350K14S
060/07.02
RE 50 060/02.03
2/10
HED 8
Function, section, symbol
Hydro-electric pressure switches type HED 8 are piston type pressure
switches.
They basically consist of the housing (1), cartridge with spool (2),
compression spring (3), adjustment element (4) and micro-switch
(5).
If the pressure to be monitored is below the set value then the microswtich (5) is actuated. The pressure to be monitored is applied to the
piston (2) via orifice (7). The piston (2) supports itself on the spring
plate (6) and acts against the infinitely adjustable force of the
compression spring (3). The spring plate (6) transfers the movement
of the piston (2) to the micro-switch (5) and releases the same on
reaching the set pressure. Through this, the electrical circuit is either
switched on or off according to the circuit design. The mechanical
stop of the spring plate (6) protects the micro-switch (5), in the
case of sudden pressure loss, from mechanical destruction and
prevents the compression spring (3) from blocking if an over-pressure
occurs.
Note:
To increase the service life the pressure switch should be
• Mounted on anti-vibration mounts,
• Be protected from hydraulic pressure shocks.
Orifice (7) which is fitted as standard, can be replaced and matched
according to the required degree of damping required.
2
3 1
4
7
Type HED 8 OH1X/…K14"–"…
S
2
5
6
3 1
4
P
7
Type HED 8 OH1X/…K14
P
2
5
6
A
…
AS
3 1
4
P
P
7
P
HED 8
6
P
Symbol
Type HED 8 OP1X/…
5
Type HED 8 OA1X/…
Type HED 8 OH1X/…K14
3/10
KW
…
KS
RE 50 060/07.02
Technical data (for applications outside these parameters, please consult us!)
General
Weight
– Pressure switch
kg
– Sandwich plate for vertical stacking assemblies kg
0.8
0.8 (NS 6, plate height 40.5 mm)
3 (NS 6, plate height 120 mm)
2 (NS 10)
Hydraulic
Mineral oil (HL, HLP) to DIN 51 524 1);
Fast bio-degradable pressure fluids to
VDMA 24 568 (also see RE 90 221); HETG (rape seed oil) 1);
HEPG (polyglycole) 2); HEES (synthetic ester) 2);
Other pressure fluids on request
Pressure fluid
Pressure fluid temperature range
°C
– 30 … + 80 (for NBR seals)
– 20 … + 80 (for FKM seals)
Ambient temperature range
°C
– 30 … + 50 (for NBR seals)
– 20 … + 50 (for FKM seals)
mm2/s
Viscosity range
10 … 800
Degree of contamination
Maximum permissible degree of contamination of the pressure
fluid is to NAS 1638 class 9. We, therefore recommend a filter
with a minimum retention rate of ß10 ≥ 75.
Switching accuracy (repeatability)
< ± 1 % of settable range
Permissible switching frequency
1/h
4800
Pressure adjustment range
Pressure stage (Max. settable pressure) in bar
Max. operating pressure in bar
Pressure adjustment range in bar
50
350
2 to 50
100
350
4 to 100
200
350
5 to 200
350
500
8 to 350
630
630
30 to 630
Electrical technical data
Electrical connection
Plug-in connector to DIN 43 650, form A, 3-pin + PE
Max. connection cross-sectional area
Max. contact load
mm2
1.5
– AC
250 V; 5 A
– DC
50 V/1 A; 125 V/0.03 A; 250 V/0.02 A
Protection to DIN 40 050
IP 65
With DC inductive loading, a spark suppresser must be provided in order to increase the service life.
1)
2)
Suitable for NBR and FKM seals
Only suitable for FKM seals
RE 50 060/07.02
4/10
HED 8
Switching pressure differential
Pressure stage 50
Pressure stage 100
1
0
10
20
30
40
50
6
4
2
0
10
10
5
0
20
40
60
80 100 120 140 160 180 200
40
50
60
70
80
90 100
Pressure stage 350
Scatter
25
20
15
10
5
50
100
150
200
250
300
350
Lower switching pressure in bar →
max.
50
Scatter
40
30
20
min.
Switching pressure differential in bar →
30
0
Lower switching pressure in bar →
Pressure stage 630
30
min.
Scatter
15
Switching pressure differential in bar →
Pressure stage 200
max.
20
20
Lower switching pressure in bar →
min.
Switching pressure differential in bar →
Lower switching pressure in bar →
max.
2
Scatter
3
8
min.
Scatter
5
4
max.
max.
10
min.
Switching pressure differential in bar →
6
Switching pressure differential in bar →
12
7
10
0
100
200
300
400
500
630
Lower switching pressure in bar →
HED 8
5/10
RE 50 060/07.02
Unit dimensions
(Dimensions in mm)
15
Type HED 8 OH1X/…
14
15
10
1 12 11
92
16 8 15 13
Type HED 8 OP1X/…
Pg 11
P
4
20
11 (16) 2)
7
Ø4
42
40
20,5
20,5
40
P
Ø39
Ø6
Type HED 8 OA1X/…
89
G 1/4
4
37
17
2 x Ø5,5
7
24
18
92
2
75
7
9
3
23
2 x Ø5,5
23
31
39,5
40
30
40
30
12
7
55
4
92
31
88
5
0,01/100mm
Required surface finish of the
mating peice
with versions "OH" and "OP"
1
2
3
4
5
6
7
8
9
10
11
12
13
Adjustment element "KW"
Adjustment element "KS"
Adjustment element "–"
Adjustment element "S"
Adjustment element "A"
Adjustment element "AS"
Seal ring
Seal ring
Space required to remove the key
Space required to remove the plug-in connector
Hexagon 27A/F (adjustment element "KS")
Hex. socket 10A/F
Plug-in connector without circuitry to DIN 43 650 1)
12
39,5
R max 4
55
7
92
14 Plug-in connector with circuitry to DIN 43 650 1)
15 2 off fixing screws M5 x 12 (M5 x 16) 2)
DIN 912–10.9, tightening torque MA = 8.9 Nm
(included within the scope of supply).
16 Maximum diameter of the mounting surface
of the mating piece (type HED 8 OH1X/…)
17 Maximum diameter of the mounting surface
of the mating piece (type HED 8 OP1X/…)
Valve fixing screws (types HED 8 OA and HED 8 OP) M5 x 50
DIN 912-10.9, tightening torque MA = 8.9 Nm,
must be ordered separately.
Pipe thread "G" to ISO 228/1
1)
2)
RE 50 060/07.02
6
6/10
Must be ordered separately, see page 2.
Details for ( ) only for the 630 bar pressure stage!
HED 8
Installation guidelines: for applying the pressure switch type HED 8… in stacking assemblies NS 6 (Dimensions in mm)
295
287
99
99
261
89
48
39,5
86
40,5
86
1
2
3
1
1 Pressure switch HED 8 OH… for use in
stacking assemblies (can be rotated 4 x
through 90° for mounting)
The mounting possibilities of the
pressure switch depends on the design
of the adjacent stacking plates!
2 Sandwich plate type HSZ 06 for
mounting the pressure switch as a
stacking element
3 Stacking elements
4 Space required to remove the key
5 Space required to remove the plug-in
connector
103
P
A
T
H3
H1
H2
65
B
121
4
28
295
15
18
5
Installation guidelines: for applying the pressure switch type HED 8… in stacking assemblies NS 10 (Dimensions in mm)
297
289
99
99
263
91
86
72
39,5
50
86
1
2
3
1 Pressure switch HED 8 OH… for use in
stacking assemblies (can be rotated 4 x
through 90° for mounting)
The mounting possiblities of the pressure
switch depends on the design of the
adjacent stacking plates!
2 Sandwich plate type HSZ 10 for
mounting the pressure switch as a
stacking element
3 Stacking elements
4 Space required to remove the key
5 Space required to remove the plug-in
connector
1
103
H2
B
P
A
H3
H1
86
TB TA
4
18
28
Nominal size 6
Nominal size 10
HED 8
15
113
297
5
H1
H2
H3
Plug-in connector without circuitry
91
102
69
Plug-in connector with circuitry
94
105
72
Plug-in connector without circuitry
104
112
69
Plug-in connector with circuitry
107
115
72
7/10
RE 50 060/07.02
Sandwich plate NS 6:
for applying the pressure switch type HED 8… as a vertical stacking element (up to 350 bar) (Dimensions in mm)
4 x M5; 8
3
25
20,25
3
0,75
20,25
4 x M5; 8
89
40,5
1
A
31
31,75
B
31
31
44
T
P
31
40,5
Ø9,5; 2,5 /
M8 x 1; 8
120
4 x Ø5,3
4
2
4
31
Ø9,5; 2,5 /
M8 x 1; 8
5
1
2
3
4
0,01/100mm
Seal ring
Through holes for valve fixing
Mounting surface for pressure switch
Measuring port, optional
5 Plate height 40.5 mm or 120 mm,
optional
Sandwich plates must be ordered
separately.
HSZ 06
A
– 3X
00
Sandwich plate
Nominal size 6
= 06
Porting pattern to DIN 24 340, form A
=A
Version No. (see below)
= 6..
Series 30 to 39
= 3X
(30 to 39: unchanged installation and connection dimensions)
R max 4
Required surface finish of the
mating piece
*
Further details in clear text
NBR seals
FKM seals
(other seals on request)
M=
V=
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
Preferred types and standard components are
highlighted in RPS (Standard Price list).
Sandwich plate NS 6: symbols, version no. (version no. in () for 120 mm plate height!)
( 1 = component side, 2 = subplate side)
Pressure switch
effective in channel…
P
Version No.
A
B
T
P
A
Version No.
A
2
B
T
P
A
Version No.
A
2
B
T
P
A
A
2
A
2
2
T
P
610 (629)
A
2
B
T
T
P
A
2
B
T
604 (623)
1
B
T
P
A
2
B
T
607 (626)
1
B
611 (630)
8/10
B
1
1
B
2
601 (620)
606 (625)
1
P
P
1
605 (624)
Pressure switch
effective in channel…
T
603 (622)
1
P
B
1
602 (621)
Pressure switch
effective in channel…
2
1
609 (628)
1
P
RE 50 060/07.02
2
608 (627)
Pressure switch
effective in channel…
Version No.
1
1
T
P
A
2
B
T
612 (631)
HED 8
Sandwich plate NS 10:
for pressure switch type HED 8… as a vertical stacking element (up to 350 bar)
3
4 x M5; 8
Ø9,6; 2,5 /
M8 x 1; 8
(Dimensions in mm)
Ø9,6; 2,5 /
M8 x 1; 8
4 x M5; 8
91
54
18,5
4
4
P
B
31
31
70
46
A
TA
31
50
1
2
3
4
TB
4 x Ø6,6
1
Seal ring
Through holes for valve fixing
Mounting surface for pressure switch
Measurement port, optional
31
2
0,01/100mm
Sandwich plates must be ordered
separately.
3
R max 4
Required surface finish of the
mating piece
HSZ 10
A
– 3X
00
Sandwich plate
Nominal size 10
= 10
Porting pattern to DIN 24 340, form A
=A
Version No. (see below)
= 6..
Series 30 to 39
= 3X
(30 to 39: unchanged installation and connection dimensions)
*
Further details in clear text
NBR seals
FKM seals
(other seals on request)
M=
V=
Attention!
The compatibility of the seals and pressure
fluid has to be taken into account!
Preferred types and standard components are
highlighted in the RPS (Standard Price list).
Sandwich plate NS 10: symbols, version no. ( 1 = component side, 2 = subplate side)
Pressure switch
effective in channel…
TA P
2
A
Version No.
TB
TA P
A
A
Version No.
2
B
TB
TA P
A
A
Version No.
2
B
TB
TA P
A
A
2
A
2
2
TB
TA P
610
A
2
611
9/10
B
TB
B
TB
B
TB
B
TB
1
B
TB
TA P
A
2
606
1
B
TB
TA P
A
2
609
1
1
B
2
603
608
1
TA P
TA P
1
607
Pressure switch
effective in channel…
TB
605
1
TA P
B
1
604
Pressure switch
effective in channel…
2
1
602
1
TA P
HED 8
B
601
Pressure switch
effective in channel…
Version No.
1
1
B
TB
TA P
A
2
612
RE 50 060/07.02
Terminal allocation
Without
indicator light
With
indicator light
1
3
1
3
2
2
PE
ge
p
p
gn
0 (MP)
PE
Circuit example
R(P)
p
2
gn
3
ge
R(P)
Differential circuit,
normally open
(2 x HED 8)
Simple circuit
(1 x HED 8)
1
Operating
relay
MP(N)
Operating
relay
Bosch Rexroth AG
Industrial Hydraulics
Bosch Rexroth Limited
D-97813 Lohr am Main
Zum Eisengießer 1 • D-97816 Lohr am Main
Telefon 0 93 52 / 18-0
Telefax 0 93 52 / 18-23 58 • Telex 6 89 418-0
eMail [email protected]
Internet www.boschrexroth.de
Cromwell Road, St Neots,
Cambs, PE19 2ES
Tel: 0 14 80/22 32 56
Fax: 0 14 80/21 90 52
eMail: [email protected]
RE 50 060/07.02
10/10
1
p
p
min.
2
gn
1
3
ge
max.
2
gn
3
ge
MP(N)
The data specified above only serves to describe
the product. No statements concerning a certain
condition or suitability for a certain application
can be derived from our information.
The details stated do not release you from the
responsibility for carrying out your own
assessment and verification. It must be
remembered that our products are subject to a
natural process of wear and ageing.
HED 8