Bosch Rexroth HED 8 Series User manual

RE 50061, edition: 2016-09, Bosch Rexroth AG
Hydro-electric pressure switch
Features
▶ For subplate mounting
▶ For G1/4” pipeline installation
▶ For flange connection according to ISO 16873
▶ As vertical stacking element in connection with sand-
wich plates according to ISO 4401
▶ 5 pressure ratings
▶ 4 adjustment types:
– Spindle with/without protective cap
– Spindle with scale, with/without protective cap
– Rotary knob with scale
– Lockable rotary knob with scale
▶ Electrical connection
– With valve connector of design A
(large cubic connector)
– with M12 x 1 connector
▶ Micro switch with NC/NO contact function
▶ Potential-free switching of currents from 1mA to 2A
▶ UL approval for pressure ranges up to 350 bar
▶ Component series 2X
▶ Max. operating pressure 630 bar
RE 50061
Edition: 2016-09
Replaces: 06.15
TB0004+TB0040
Type HED 8
Contents
Features 1
Ordering data 2
Function, section, symbol 3
Technical data 4
Characteristic curves: Switching pressure differential 6
Dimensions 7
Installation information 10
Ordering code: Sandwich plate size 6 12
Symbols, variant no.: Sandwich plate size 6 12
Dimensions: Sandwich plate size 6 13
Ordering code: Sandwich plate size 10 14
Symbols, variant no.: Sandwich plate size 10 14
Dimensions: Sandwich plate size 10 15
Electrical connection 16
Mating connectors 16
Further information 16
Contents
Features 1
Ordering data 2
Function, section 3
Technical data
(For applications outside these parameters, please consult us!) 4
Technical data
(For applications outside these parameters, please consult us!) 5
Characteristic curves: Switching pressure differential
(measured with HLP46, ϑOil = 40 ± 5 °C) 6
Dimensions: Type HED 8 …K14
(dimensions in mm) 7
Dimensions: Type HED 8 …K35
(dimensions in mm) 8
Dimensions 9
Installation information: Type HED 8 OH… in vertical stacking NG6
(dimensions in mm) 10
Installation information: Type HED 8 OH… in vertical stacking NG10
(dimensions in mm) 11
Ordering code: Sandwich plate size 6 (separate order) 12
Symbols, variant no.: Sandwich plate size 6 (①= component side, ②= plate side) 12
Dimensions: Sandwich plate size 6 for type HED 8 OH… as
vertical stacking element (up to 350 bar)
(dimensions in mm) 13
Ordering code: Sandwich plate size 10 (separate order) 14
Symbols, variant no.: Sandwich plate size 10 (①= component side, ②= plate side) 14
Dimensions: Sandwich plate size 10 for type HED 8 OH… as
vertical stacking element (up to 350 bar)
(dimensions in mm) 15
Electrical connection according to DIN EN 175301-803 16
Mating connectors according to DIN EN 175301-803 16
Further information 16

2/16 HED 8 | Pressure Switch
Bosch Rexroth AG, RE 50061, edition: 2016-09
Ordering data
01 Piston type pressure switch HED8
02 Flange connection (ISO 16873)1) OH
Subplate mounting OP
Pipeline installation OA
03 Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions) 2X
04 Max. pressure rating 50 bar 50
Max. pressure rating 100 bar 100
Max. pressure rating 200 bar 200
Max. pressure rating 350 bar 350
Max. pressure rating 630 bar 630 2)
Electrical connection
05 Individual connection
Without mating connector; connector DIN EN 175301-803 K14 3)
Without mating connector; connector IEC 61076-2-101, M12 x 1, A-coding K35 3)
Adjustment type
06 Spindle with internal hexagon, without scale, without protective cap no code
Spindle with internal hexagon, without scale, with protective cap, sealing S
Spindle with scale, without protective cap A 5)
Spindle with scale, with protective cap AS 5)
lockable rotary knob with scale KS 4; 5)
Rotary knob with scale KW 5)
Seal material
07 NBR seals no code
FKM seals V
Low-temperature seal (max. 315 bar) MT
Observe compatibility of seals with hydraulic fluid used! (Other seals upon request)
08 Further details in the plain text
01 02 03 04 05 06 07 08
HED8 – 2X / *
1) Sandwich plate for vertical stacking,
separate order, see accessories
2) Not permissible for vertical stacking,
not with low-temperature seal,
without UL approval
3) Mating connectors, separate order, see accessories
4) H-key, material no. R900008158,is included in the scope of
delivery
5) The exact setting of the switching pressure is only possible using
a pressure gauge (scale is used as orientation)
Accessories
▶ Sandwich plates for vertical stacking see page
12 and 14.
▶ Mating connectors for the electrical connection
see page16.

Pressure Switch | HED 8 3/16
RE 50061, edition: 2016-09, Bosch Rexroth AG
The hydro-electric pressure switch type HED 8 is a piston
type pressure switch. It basically comprises of housing (1),
installation kit with piston (2), compression spring (3),
adjustment element (4) and micro switch (5).
If the pressure to be monitored is below the set pressure,
the micro switch (5) is operated. The pressure to be moni-
tored is applied via the nozzle (7) at the piston (2). The
piston (2) is supported by the spring plate (6) and acts
against the continuously adjustable force of the compres-
sion spring (3). The spring plate (6) transmits the move-
ment of the piston (2) onto the micro switch (5) and
releases the latter when the set pressure is reached. This
switches the electric circuit on or off, depending on the
circuit set-up. The mechanical positive stop of the spring
plate (6) protects the micro switch (5) in case of a sudden
pressure drop from mechanical destruction and, in case of
overpressure, prevents solid compression of the compres-
sion spring (3).
Notes:
In order to increase the life cycle, the pressure switch
should be mounted with low vibrations and protected
from hydraulic pressure surges.
Function, section




 









 

Symbol Type HED 8 OP-2X/…K14A
Type HED 8 OP-2X/…K14AS
Type HED 8 OA-2X/…K14KW
Type HED 8 OA-2X/…K14KS
Type HED 8 OH-2X/…K14
Type HED 8 OH-2X/…K14S

4/16 HED 8 | Pressure Switch
Bosch Rexroth AG, RE 50061, edition: 2016-09
Technical data
(For applications outside these parameters, please consult us!)
Hydraulic
Pressure rating bar 50 100 200 350 630
Max. operating pressure
Conformity ▶ NBR/FKM seals bar 350 350 350 400 630
▶ MT version bar 315 315 315 315 –
Pressure adjustment range (decreasing) bar 5...50 10...100 15...200 25...350 40...630
Pressure differential per rotation 1) bar ≈19 ≈35 ≈77 ≈120 ≈214
Hydraulic fluid 1) see table below
Hydraulic fluid temperature range
(at the valve operating ports)
°C -25 ... +80 (NBR seals)
-20 ... +80 (FKM seals)
-40 … +80 (low-temperature seals)
Viscosity range mm2/s 10 … 800
Maximum permissible degree of contamination of the hy-
draulic fluid, cleanliness class according to ISO 4406 (c)
Class 20/18/15 2)
Load cycles ≥ 5 million
General
Mass kg 0.8
Installation position any
Ambient temperature range °C -25 to +50 (NBR seals)
-20 to +50 (FKM seals)
-40 to +50 (low-temperature seals)
Sine test according to DIN EN 60068-2-6:1996-05 5...2000 Hz, max. 10 g, 10 double cycles
Transport shock according to DIN EN 60068-2-27:1995-03 15 g / 11 ms
Bump test according to DIN EN 60068-2-29:1995-03 25 g / 6 ms
Noise test according to DIN EN 60068-2-64:1996-05 20...2000 Hz 10...30 min
Conformity ▶ CE DIN EN 61058-1: 2002 / A2: 2008
DIN EN 60947-1: 2007 / A1: 2011
DIN EN 60947-5-1: 2004 / A1: 2009
DIN EN 60529: 1991 / A2: 2013
▶ UL UL 508 17th edition File No E223220 (up to 350 bar)
▶ CCC GB 14048.5-2008
Hydraulic fluid Classification Suitable
sealing materials
Standards Data sheet
Mineral base oils HL, HLP, HLPD, HVLP, HVLPD NBR, FKM low-temperature
seals
DIN 51524 90220
Bio-degradable ▶ Insoluble in water HETG NBR, FKM ISO15380 90221
HEES FKM
▶ Soluble in water HEPG FKM ISO15380
Flame-resistant ▶ Water-free HFDU, HFDR FKM ISO 12922 90222
▶ Containing water HFC (Fuchs Hydrotherm 46M,
Petrofer Ultra Safe 620)
NBR ISO 12922 90223
Important information on hydraulic fluids:
▶ For more information and data about the use of other hydraulic
fluids, refer to data sheets above or contact us!
▶ There may be limitations regarding the technical data (tempera-
ture, pressure range, life cycle, maintenance intervals, etc.).
▶ Flame-resistant – contains water:
– Maximum pressure differential per control edge 50bar
– Pressure pre-loading at the tank port > 20% of the pressure
differential, otherwise increased cavitation
– Life cycle as compared to operation with mineral oil HL,
HLP 50 to 100%
▶ Bio-degradable and flame-resistant: When using these hydraulic
fluids that are simultaneously zinc-solving, zinc may accumulate
(700mg zinc per pole tube).

Pressure Switch | HED 8 5/16
RE 50061, edition: 2016-09, Bosch Rexroth AG
Technical data
(For applications outside these parameters, please consult us!)
Electrical
Electrical
connection
▶ with “K14” connector EN 175301-803, 3-pole + PE
▶ with “K35” connector IEC 61076-2-101, M12 x 1, A-coding, 4-pole
Protection class accord-
ing to DIN EN 60529
▶ with “K14” connector IP 65 with mating connector fitted and screwed in place
▶ with “K35” connector IP 67 with mating connector fitted and screwed in place
Maximum switching frequency 1/h 7200
Switching accuracy (repetition accuracy) < ± 1% of the set pressure
Switches according to VDE 0630-1/DIN EN 61058-1
Transition resistance mΩ < 50
Insulation coordination Overvoltage category 3
Contamination Degree of contamination 3
Bounce time ▶ ON ms < 5
▶ OFF ms < 5
Utility model according to
IEC 60947
Minimum current mA 1.0 with 24 V DC DC-12
Maximum current ▶ with “K14” connector A 0.5 at 50 V DC, inductive
0.2 at 125 V DC, inductive
0.1 at 250 V DC, inductive
2.0 at 250 V AC
DC-22
DC-22
DC-22
AC-12
▶ with “K35” connector A 0.5 with 48 V DC, inductive
2.0 with 48 V DC, ohmic load
DC-22
AC-12
Switching power
Switching cycles Voltage Uin V Ohmic load max. in A Inductive load, max. in A
with “K14” connector
2 million 250, AC 2 A for 2 million circuits (AC-12) 0,5 A, cos. ϕ = 0,6 for 2 mil. circuits (AC-22)
With “K14” and “K35” connectors
2 million 24, DC 2 A for 2 million circuits (DC-12) 0.5 A for 2 million circuits 3)
5 million 24, DC 5.0 mA for 5 million circuits (DC-12) –
1) Direction of rotation:
– clockwise → set pressure increase
– anti-clockwise → set pressure decrease
2) The cleanliness classes specified for the components must be
adhered to in hydraulic systems. Effective filtration prevents faults
and at the same time increases the life cycle of the components.
For the selection of the filters see www.boschrexroth.com/filter.
3) Value does not comply with any utility category according to
IEC 60947

6/16 HED 8 | Pressure Switch
Bosch Rexroth AG, RE 50061, edition: 2016-09
Characteristic curves: Switching pressure differential
(measured with HLP46, ϑOil = 40 ± 5 °C)
Notes:
The switching pressure differential may increase within
the course of the life cycle due to the deterioration of
the oil quality and the number of load cycles.





   











         




         





      








     
Pressure rating 50 Pressure rating 100
Pressure rating 200 Pressure rating 350
Pressure rating 630
Lower switching pressure in bar →Lower switching pressure in bar →
Lower switching pressure in bar →Lower switching pressure in bar →
Lower switching pressure in bar →
Switching pressure differential in bar →
Switching pressure differential in bar →Switching pressure differential in bar →
Switching pressure differential in bar →
Switching pressure differential in bar →

Pressure Switch | HED 8 7/16
RE 50061, edition: 2016-09, Bosch Rexroth AG


Required surface quality of the device
contact surface
(for “OH” and “OP” designs)
Dimensions: Type HED 8 …K14
(dimensions in mm)
For item explanations see page 9.







































 










Type HED 8 OH…
Type HED 8 OP…
Type HED 8 OA…
Connection dimensions

8/16 HED 8 | Pressure Switch
Bosch Rexroth AG, RE 50061, edition: 2016-09




 




































 














Required surface quality of the device
contact surface
(for “OH” and “OP” designs)
Type HED 8 OH…
Type HED 8 OP…
Type HED 8 OA…
Connection dimensions
Dimensions: Type HED 8 …K35
(dimensions in mm)
For item explanations see page 9.

Pressure Switch | HED 8 9/16
RE 50061, edition: 2016-09, Bosch Rexroth AG
Dimensions
1Adjustment type “KW”
2Adjustment type “KS”
3Adjustment type “-”
4Adjustment type “S”
5Adjustment type “A”
6Adjustment type “AS”
7Seal ring
8Space required to remove the key
9Space required to remove the mating connector
10 Hexagon SW27 (with adjustment type “KS”)
11 Internal hexagon SW10
12 Mating connector without circuitry for “K14” connection
(separate order see page 16)
13 Mating connector with circuitry for “K14” connection
(separate order, see page 16)
14 Mating connector for “K35” connection (separate order see
page 16)
15 Mating connector suitable for “K35”, angled
(separate order see page 16)
16 Mating connector for “K35” connection with cable
(separate order see page 16)
17 Valve mounting screw (separate order) for type HED 8 OH…
2 hexagon socket head cap screws
metric
ISO 4762 - M5 x 55 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA= 6+0,5 Nm,
Material no. R913000261
18 Maximum diameter of the counterpart connection bore
(type HED 8 OH…)
19 Maximum diameter of the counterpart connection bore
(type HED 8 OP…)
20 Valve mounting screws (separate order) for type HED 8
OA… and …OP…
2 hexagon socket head cap screws
metric
ISO 4762 - M5 x 50 - 10.9-flZn-240h-L
Friction coefficient µtotal = 0.09 to 0.14,
Tightening torque MA= 7+0.5 Nm,
Material no. R913000064

10/16 HED 8 | Pressure Switch
Bosch Rexroth AG, RE 50061, edition: 2016-09
Installation information: Type HED 8 OH… in vertical stacking NG6
(dimensions in mm)
1Pressure switch HED 8 OH… for use in stacking assemblies
(can be assembled staggered by 4 x 90°)
The mounting option of the pressure switch depends on the
set-up of the next stacking assembly subplate.
2Sandwich plate type HSZ 06A... for use of the pressure
switch as stacking element (see page 12)
3Space required to remove the key
4Space required to remove the mating connector
Mating connector H1 H2 H3
“K14” connection, without circuitry 87 65 15
“K14” connection, with circuitry 92 70 15
“K35” connection, angled 92 70 10
“K35” connection, straight 111 89 10























 

