BOSCH REXROTH
R901102778
$478.80 USD
- BOSCH REXROTH
- Material:R901102778
- Model:HED8OA-2X/350K14S
Quantity in stock: 0
The Bosch Rexroth HED 8 OA-2X/350K14S (R901102778) is a high-precision hydraulic pressure switch designed for monitoring and controlling pressures in hydraulic systems. This piston type pressure switch is engineered to provide potential-free switching of currents ranging from milliamps to 0.5A, ensuring compatibility with a variety of electrical systems. The device features a micro switch with both normally closed (NC) and normally open (NO) contact functions, offering flexibility in application. The HED 8 OA-2X/350K14S is designed for pipeline installation and comes with NBR seals suitable for hydraulic fluids such as HL, HLP, HLPD, HVLP, and HVLPD. Its adjustment type includes a spindle with an internal hexagon that can be sealed with a protective cap for security against tampering. The unit does not include a mating connector but is equipped with a large cubic connector according to DIN EN standards. With its robust construction, the pressure switch can handle maximum pressures up to 350 bar and offers various pressure ratings including 50, 100, 200, and 315 bar. Its electrical connection is facilitated through a connector pole PE according to DIN EN standards, supporting supply voltages from 24 to 240 V AC/DC. The HED 8 series boasts high repetition accuracy below 1% of the set pressure point and features a small hysteresis for precise control. It also has UL recognition for certain pressure ranges up to 350 bar and carries CE, CCC, UL, and RoHS conformity marks. Additionally, this model provides options for subplate mounting or pipeline installation as well as flange connections according to ISO standards. It can also be used as a vertical stacking element in conjunction with sandwich plates following ISO standards. Users can choose from different adjustment types such as spindle with or without protective cap or rotary knob variations for enhanced usability. For reliable performance in demanding applications that require accurate pressure monitoring and control within hydraulic circuits, the Bosch Rexroth HED 8 OA-2X/350K14S stands out as an optimal solution.
350 bar, micro switch with NC contact/NO contact function, device connector DIN EN 175301-803 (large cubic connector)
Potential-free switching of currents from 1 mA to 2.0 A. Small hysteresis, depending on the set switching point. High repetition accuracy
Unpacked Weight: 0.74 kg
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 value, the micro switch (5) is operated. The pressure to be monitored 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 compression spring (3). The spring plate (6) transmits the movement 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 compression spring (3).
Notices:
In order to increase the life cycle, the pressure switch should be mounted with low vibrations and protected from hydraulic pressure surges.
Type HED 8 OH-2X/…K14
Type HED 8 OH-2X/…K14S
Type HED 8 OP-2X/…K14A
Type HED 8 OP-2X/…K14AS
Type HED 8 OA-2X/…K14KW
Type HED 8 OA-2X/…K14KS
| Piston type pressure switch |
| Micro switch with NC contact/NO contact function |
| Pipeline installation |
| Adjustment type: Spindle with internal hexagon, without scale, with protective cap, sealable |
| Without mating connector, connector DIN EN 175301-803 |
| With NBR seals |
| Component series 2X |
| UL recognized component, CCC-certified |
| Maximum operating pressure 630 bar |
| Pressure ratings 50, 100, 200, 350 and 630 bar |
| Data Sheet | Download Data Sheet |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Manual | Download Manual |
| Max. pressure | 350 |
| Electrical connection description | Connector 4-pole (3 + PE) according to EN 175301-803 |
| Productgroup ID | 9,10,11,12,13,14 |
| Conformity description | CE – according to Low-Voltage Directive 2014/35/EU |
| Electrical connector | Connector 4-pole (3 + PE) |
| Type of connection | Pipeline |
| Connection diagram | Internal thread G1/4 |
| Supply voltage | 12...250 V AC/DC |
| Weight | 0.74 |
| Seals | NBR |
| Output signal | Micro switch with normally closed contact/NO contact function |
| Hydraulic fluid | HL,HLP,HLPD,HVLP,HVLPD |
| Conformity | CE,CCC,UL,RoHS |
|
01 |
Piston type pressure switch |
HED8 |
|
02 |
Flange connection (ISO 16873) 1) |
OH |
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Subplate mounting |
OP |
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|
Pipeline installation |
OA |
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|
03 |
Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions) |
2X |
|
04 |
Pressure rating maximum 50 bar |
50 |
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Pressure rating maximum 100 bar |
100 |
|
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Pressure rating maximum 200 bar |
200 |
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Pressure rating maximum 350 bar |
350 |
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Pressure rating maximum 630 bar |
630 |
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Electrical connection |
||
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05 |
Individual connection |
|
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Without mating connector; connector DIN EN 175301-803 |
K14 3) |
|
|
Without mating connector, 4-pole with connector M12x1, integrated interference protection circuit, status LED according to IEC 60947-5-2 |
K35 3) |
|
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Adjustment type |
||
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06 |
Spindle with internal hexagon, without scale, without protective cap |
no code |
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Spindle with internal hexagon, without scale, with protective cap, sealable |
S |
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Spindle with scale, without protective cap |
A5) |
|
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Spindle with scale, with protective cap |
AS5) |
|
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Lockable rotary knob with scale |
KS4; 5) |
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Rotary knob with scale |
KW 5) |
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Seal material |
||
|
07 |
NBR seals |
no code |
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FKM seals |
V |
|
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Low-temperature seals (max. 315 bar) |
MT |
|
|
Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) |
||
|
08 |
Further details in the plain text |
|
| 1) Sandwich plate for vertical stacking, separate order see accessories | |
| 2) Not admissible for vertical stacking, not with low-temperature seals, without UL approval | |
| 3) Mating connectors, separate order, see accessories | |
| 4) H-key, material no. R900008158, is included in the scope of delivery | |
| 5) Exact setting of the switching pressure is only possible by means of a pressure gauge (scale only serves as orientation) |
Type
|
Component series |
2X |
General
|
Weight |
m |
kg |
0.8 | |
|
Installation position |
any | |||
|
Ambient temperature ranges (NBR seals) |
ϑ |
°C |
-25 … +50 | |
|
Ambient temperature ranges (FKM seals) |
ϑ |
°C |
-20 … +50 | |
|
Ambient temperature range (low-temperature seal) |
ϑ |
°C |
-40 … +50 | |
|
Sine test |
DIN EN 60068-2-6:1996-05: 10…2000 Hz / max. 10 g / 10 double cycles | |||
|
Transport shock |
DIN EN 60068-2-27:1995-03: 15 g / 11 ms | |||
|
Bump test |
DIN EN 60068-2-29:1995-03: 25 g / 6 ms | |||
|
Noise test |
DIN EN 60068-2-64:1996-05: 20…2000 Hz / 10 g RMS / 30 min | |||
|
Conformity/certification |
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 |
||
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UL |
UL, 508 17th edition File No E223220 (up to 350 bar) | |||
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CCC |
GB 14048.5-2008 | |||
|
RoHS |
Compliant according to EU directive 2011/65/EU | |||
Hydraulisch
|
Pressure rating |
p |
bar |
50 | 100 | 200 | 350 | 630 |
|
Operating pressure NBR/FKM seals, max. |
p |
bar |
350 | 400 | 630 | ||
|
Pressure adjustment range (decreasing) |
p |
bar |
5 … 50 | 10 … 100 | 15 … 200 | 25 … 350 | 40 … 630 |
|
Pressure differential per rotation 1) |
p |
bar |
≈ 19 | ≈ 35 | ≈ 77 | ≈ 120 | ≈ 214 |
|
Hydraulic fluid 1) |
see table below | ||||||
|
Hydraulic fluid temperature range (NBR seals) |
ϑ |
°C |
-25 … +80 | ||||
|
Hydraulic fluid temperature range (FKM seals) |
ϑ |
°C |
-20 … +80 | ||||
|
Hydraulic fluid temperature range (low-temperature seals) |
ϑ |
°C |
-40 … +80 | ||||
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Viscosity range |
μ |
mm²/s |
10 … 800 | ||||
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Maximum admissible degree of contamination of the hydraulic fluid 2) |
Class 20/18/15 according to ISO 4406 (c) | ||||||
|
Load cycles |
≥ 5 million | ||||||
| 1) |
Direction of rotation: clockwise → Set pressure increase counterclockwise → Set pressure decrease |
| 2) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. |
|
Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
|
|
Mineral oils and related hydrocarbons |
HL, HLP |
NBR, FKM |
DIN 51524 |
|
|
HVLP |
Low-temperature design MT |
|||
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Bio-degradable |
Insoluble in water |
HETG |
NBR, FKM |
ISO 15380 |
|
HEES |
FKM |
|||
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Soluble in water |
HEPG |
FKM |
ISO 15380 |
|
|
Flame-resistant |
Containing water |
HFC |
NBR |
ISO 12922 |
|
Important information on hydraulic fluids! Further information and information on the use of other hydraulic fluids on request! |
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Elektrisch
|
Anschlussart |
With connector "K14" |
EN 175301-803, 3-pole + PE | ||
|
With connector "K35" |
IEC 61076-2-101, M12 x 1, A coding, 4-pole | |||
|
Protection class according to DIN EN 60529 |
With connector "K14" |
IP65 with mating connector mounted and fitted | ||
|
With connector "K35" |
IP 67 with mating connector mounted and fitted | |||
|
Switching frequency, max. |
1/h |
7200 | ||
|
Switching accuracy (repetition accuracy) |
< 1 % of the set pressure | |||
|
Switch |
according to VDE 0630-1/DIN EN 61058-1 | |||
|
Transition resistance |
R |
mΩ |
< 50 | |
|
Insulation coordination |
Überspannung Kategorie 3 | |||
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Contamination |
Degree of contamination 3 | |||
|
Bounce time |
On |
t |
ms |
< 5 |
|
Off |
t |
ms |
< 5 | |
|
Current, min. |
I |
mA |
1.0 with 24 V DC | |
|
Current, max. |
With connector "K14" |
I |
A |
0.5 with 50 V DC, inductive 0.2 with 125 V DC, inductive 0.1 with 250 V DC, inductive 2.0 with 250 V AC |
|
With connector "K35" |
I |
A |
0.5 with 48 V DC, inductive 2.0 with 48 V DC, ohmic load |
|
|
Switching power |
|||
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Switching cycles |
Voltage U in V |
Ohmic load max. in A |
Inductive load, max. in A |
|
With connector "K14" |
|||
|
2 million |
250, AC |
2 A for 2 million switching cycles (AC-12) |
0.5 A, cos. ϕ = 0.6 for 2 million switching cycles (DC-12) |
|
With connector “K14” and “K35” |
|||
|
2 million |
24, DC |
2 A for 2 million switching cycles (AC-12) |
0.5 A for 2 million switching cycles 3) |
|
5 million |
24, DC |
5.0 mA for 5 million switching cycles (DC-12) |
‒ |
For applications outside these parameters, please consult us!
Switching pressure differential (measured with HLP46, ϑOil = 40 ±5 °C)
Pressure rating 50 bar
Pressure rating 100 bar
Pressure rating 200 bar
Pressure rating 350 bar
Pressure rating 630 bar
Notices:
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.
|
"K14" without indicator light |
"K14" with indicator light |
"K35" |
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|
|
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Switching function Terminals 1-2: In case of pressure increase, contact opens Terminals 1-3: In case of pressure increase, contact closes |
Switching function Terminals 1-2: In case of pressure increase, contact opens Terminals 1-4: In case of pressure increase, contact closes |
|
Notice:
For general information on safety, installation or commissioning, see operating instructions.
Type HED 8 …K14
Dimensions in mm
|
1 |
Adjustment type "KW" |
|
2 |
Adjustment type "KS" |
|
3 |
Adjustment type "–" |
|
4 |
Adjustment type "S" |
|
5 |
Adjustment type "A" |
|
6 |
Adjustment type "AS" |
|
7 |
Seal ring |
|
8 |
Space required to remove the key |
|
9 |
Space required to remove the mating connector |
|
10 |
Hexagon SW27 (with adjustment type "KS") |
|
11 |
Internal hexagon SW10 |
|
12 |
Mating connector without circuitry for connection "K14” (separate order) |
|
13 |
Mating connector with circuitry for connection "K14” (separate order) |
|
17 |
Valve mounting screws (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 connection bore of the counterpart (type HED 8 OH…) |
|
19 |
Maximum diameter of the connection bore of the counterpart (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 |
Type HED 8 …K35
Dimensions in mm
|
1 |
Adjustment type "KW" |
|
2 |
Adjustment type "KS" |
|
3 |
Adjustment type "–" |
|
4 |
Adjustment type "S" |
|
5 |
Adjustment type "A" |
|
6 |
Adjustment type "AS" |
|
7 |
Seal ring |
|
8 |
Space required to remove the key |
|
9 |
Space required to remove the mating connector |
|
10 |
Hexagon SW27 (with adjustment type "KS") |
|
11 |
Internal hexagon SW10 |
|
14 |
Mating connector for connection "K35" (separate order) |
|
15 |
Mating connector suitable for "K35", angled (separate order) |
|
16 |
Mating connector for connection "K35", with cable (separate order) |
|
17 |
Valve mounting screws (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 connection bore of the counterpart (type HED 8 OH…) |
|
19 |
Maximum diameter of the connection bore of the counterpart (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 |
Type HED 8 OH… in vertical stacking NG6
|
1 |
Pressure switch HED 8 OH… for use in stacking assemblies (can be assembled staggered by 4 x 90°) |
|
2 |
Sandwich plate type HSZ 06A... for use of the pressure switch as stacking element |
|
3 |
Space required to remove the key |
|
4 |
Space required to remove the mating connector |
|
Mating connector |
H1 |
H2 |
H3 |
|
Port “K14”, without circuitry |
87 |
65 |
15 |
|
Port “K14”, with circuitry |
92 |
70 |
15 |
|
Port “K35”, angled |
92 |
70 |
10 |
|
Port “K35”, straight |
111 |
89 |
10 |
Type HED 8 OH… in vertical stacking NG10
|
1 |
Pressure switch HED 8 OH… for use in stacking assemblies (can be assembled staggered by 4 x 90°) |
|
2 |
Sandwich plate type HSZ 10A... for use of the pressure switch as stacking element |
|
3 |
Space required to remove the key |
|
4 |
Space required to remove the mating connector |
|
Mating connector |
H1 |
H2 |
H3 |
|
Port “K14”, without circuitry |
100 |
65 |
15 |
|
Port “K14”, with circuitry |
105 |
70 |
15 |
|
Port “K35”, angled |
105 |
70 |
10 |
|
Port “K35”, straight |
124 |
89 |
10 |
Mating connectors for mechanical pressure switches with connector “K14”, without circuitry, standard
4P Z14
Mating connectors for mechanical pressure switches with connector “K14”, without circuitry, standard
4P Z14
For mechanical pressure switches with connector “K14”, according to EN 175301-803 and ISO 4400, 3-pole + PE, “large cubic connector”Data sheet
Spare parts & repair
Mating connectors for mechanical pressure switches with connector “K14”, with indicator lights at connections 2 and 3
4P Z15L
Mating connectors for mechanical pressure switches with connector “K14”, with indicator lights at connections 2 and 3
4P Z15L
For mechanical pressure switches with connector “K14”, according to EN 175301-803 and ISO 4400, 3-pole + PE, “large cubic connector”Data sheet
Spare parts & repair
Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1
4P Z24
Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1
4P Z24
For sensors and valves with connector “K24”, “K35” and “K72” Mating connectors M12, 4-pole, line cross-section 0.75 mm2Data sheet
Spare parts & repair