VT-SSPA1-5-1X/V0/0-24/K24

Manufacturer: Bosch Rexroth

Material #: R901238530

Model : VT-SSPA1-5-1X/V0/0-24/K24

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth VT-SSPA1-5-1X/V0/0-24/K24 (R901238530) is an advanced plugin amplifier designed for precise control in hydraulic systems. This device is adept at installation on a valve connection base compliant with EN standards, offering versatility through 90-degree rotation increments for optimal positioning on the solenoid. The command value presetting feature allows for a range between 0 and UB, ensuring that solenoid current remains proportional to the command value within a specified voltage range and nearly constant at higher values according to the Imax setting for reliable switching applications. The integrated ramp generator is engineered to manage the rate of change in the control output, with separate adjustments available for both ascending and descending ramp times. This functionality is crucial in mitigating the impact of switch-on and switch-off impulses, contributing to smoother transitions in operation. Notably, conductor connection influences this feature, highlighting its dependency on specific valve and solenoid types without affecting ramp time by the command value attenuator. Bosch Rexroth has meticulously designed the characteristic curve of this amplifier to ensure linear progression up to a certain command value threshold. Adjustments can be made using potentiometers Z for zero-point correction and G for maximum value tuning. The power output stage employs a freely clocking mechanism where clock frequency is adjusted by potentiometer f, tailored according to current levels, operating voltage, and solenoid impedance—balancing valve hysteresis against system noise levels. Furthermore, this model features a differential input only and offers an analog interface with connector design suitable for KBPS valves. It supports a regulated adjustable maximum current for high-command values and includes components like zero potentiometer for pilot current adjustment, command value attenuator for maximum current control, and dither frequency potentiometer—all within a component series X package that operates effectively at 24V.

$559.00 USD

More are expected on May 16, 2025

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Status: This product is temporarily out of stock.

Qty: Delivered as early as May 16, 2025 when ordered in

Proportional command value/current characteristic curve for command values between 0 and 100% Regulated adjustable maximum current for command values greater than approx. 120% (for differential input only) Differential input Ramp generator with separately adjustable ramp times "up/down" Zero potentiometer / pilot current Command value attenuator / maximum current Dither frequency potentiometer 24 V operating voltage

The plug-in amplifier is suitable for installation on a valve connection base according to EN 175301-803. By turning the plug insert and the electronics in the housing, the plug-in amplifier can be mounted on the solenoid in 90° increments.

Command value presetting

The command value range is between 0 and UB. In the command value range 0... 10 V the solenoid current is proportional to the command value. Starting with a command value of 12 V up to UB the solenoid current is almost constant according to the Imax setting (switching application).

Ramp generator

The ramp generator (5) limits the incline of the control output. The up and down ramp times can be adjusted separately. In switching applications, the ramps can be used to dampen the switch-on and switch-off impulse (When switching off only with 3-conductor connection, i.e. switching signal and supply are connected separately). This behavior also depends on the valve and solenoid type. The downstream command value attenuator (4) has no influence on the ramp time.

Characteristic curve

Up to a command value of approx. 110 % the transfer characteristic curve rises linearly. The zero point can be corrected using potentiometer “Z“, the maximum value can be corrected using potentiometer “G“.

Power output stage

Output stage (7) is freely clocking. The clock frequency depends on the current level, the operating voltage and the impedance of the controlled solenoid. The clock frequency can be re-adjusted using potentiometer “f“. The current output stage generates a regulated current signal according to the control output provided by the summing device (3). If the clock frequency is too high, the valve hysteresis is increased. If the clock frequency is too low, the noise level of the hydraulic system is increased.

()= Assignment to the block diagram

01	Valve amplifiers for proportional valves without electrical position feedback, Analog, Connector design	VT-SSPA1

02	For valves: KBPS 8	5

03	Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions)	1X

04	Version: standard	V0

05	Voltage input	0

06	24 V operating voltage	24

07	With cable gland	No code
07	With M12 connector	K24

01		02		03		04		05		06		07
VT-SSPA1	‒	5	‒	1X	/	V0	‒	0	‒	24	/

General

Component series			1X
Type of electronics			Analog
Design			Plug-in connector

Voltage supply

Operating voltage	nominal	U	V	24
	Lower limit value	UB(t)min	V	18
	Upper limit value	UB(t)max	V	35
Cable inductance 1)	max.	Lmax	µH	100
Power consumption	max.	Smax	VA	40
Current consumption	max.	Imax	A	1.7
Fuse				2 A time-lag

1)	Usually corresponds to a line length < 100 m.

Analog inputs

Command value	Voltage (differential input)		U	V	0 ... 10
	for the switching function of the proportional amplifier				12 ... UB
	Voltage (differential input)	Input resistance	R	kΩ	≥ 20

Solenoid outputs

Coil inductivity	min.	Lmin	mH	15
Pilot current	Factory setting	Iv	mA	0
Solenoid current	Factory setting	I	A	1.2
Coil resistance at 20°C		R(20)	Ω	4.77
Clock frequency	at Imax	f	Hz	200

Adjustment options

Setting range	Pilot current	IB	mA	0 ... 300
Setting range	Solenoid current	Imax	A	0 ... 1.8
Ramp time up/down		t	s	0.06 … 5

Supplementary information

Standard connection	of solenoid			EN 175301-803
Anschlussart				Cable gland and screw terminals
Anschlussart	alternatively			M12 connector, 4-pole
Cable diameter		L	mm	4.5 ... 11
Mounting type		L		M3 x 40 mm
Type of protection according to EN 60529 1)	Extra für FN			IP65
Ambient temperature range		ϑ	°C	-25 … 70
Storage temperature range		ϑ	°C	-25 … 85
Weight		m	kg	0.125

1)	With mounted cable/mounted mating connector

For applications outside these parameters, please consult us!

G	Command value attenuator / maximum current
Z	Zero point potentiometer / pilot current
t <	Ramp time "Ramp up"
t >	Ramp time "Ramp down"
f	Clock frequency

(1)	Internal voltage adjustment
(2)	Voltage input
(3)	Zero point potentiometer “Z” / pilot current I (IN = 0 %)
(4)	Command value attenuator “G” / maximum current I (IN = 100 %)
(5)	Ramp time potentiometer “t<” and “t>”
(6)	Frequency range correction “f”
(7)	Power output stage

Terminal / pin	Signal designation
+UB / 1	Operating voltage
0 V / 3	0 V
IN+ / 2	Command value
IN- / 4	Reference potential

Terminal connection

Danger of malfunctions

in case of EMC/ESD interferences affecting the connection cable

Do not install command value

connection lines in the gray area (arrow)!

The connection for protective earthing conductor is accessible after the

electronic circuit board has been removed.

Connection cross-section:

4 x 0.75 mm2 shielded or

5 x 0.5 mm2 shielded (connect shield in the control cabinet)

Terminal connection

M12 connector, top view

The connection for protective earthing conductor is not provided

Connection cross-section:

4 x 0.75 mm2 shielded

(connect shield in control cabinet)

2-conductor technology

Switching application with constant current control Ramp function upon switch-on

The “IN+” input is bridged with supply voltage (+UB) in the connector, the IN- input is bridged with supply voltage (0 V) in the connector.

The maximum current must generally be adjusted according to the solenoid information using potentiometer "G". The ramp time "ramp up" (t <) can be set within the range of tmin to 5 s.

2-conductor technology

3-conductor technology

Switching application with constant current control

Switching with low control power

Ramp function can be adjusted separately when switching the control voltage on and off

The “IN+” input is connected to the control voltage

(Us = 24 V), the “IN–” input is bridged with supply voltage (0 V) in the connector.

The maximum current must generally be adjusted according to the solenoid information using potentiometer "G". When switched off ("IN+" = 0 V or "IN+" = open), a pilot current can be set at "Z". It serves to reduce the switch-on delay, particularly with ramp. If required, this value can be adjusted between approx. 0 mA and approx. 15 % of the rated current. The ramp times “ramp up” (t <) and “ramp down” – (t >) can be set within the range of tmin to 5 s.

3-conductor technology

4-conductor technology

The “IN+” input is connected to the control signal (Us = 0...10 V/24 V), the “IN–” input to the reference potential of the control voltage.

Pilot current and maximum current are set using potentiometers "Z" and "G" prior to commissioning. The current can now be proportionally adjusted according to the control voltage between the set pilot current and the set maximum current. The pilot current can be set in the range from approx. 0 to approx. 15 % of the rated current, the maximum current can be set in the range from 0 to Imax .

4-conductor technology

The connector insert can be turned in 90° steps observing the protective measures for ESD protection.

The plug-in amplifier may only be wired when de-energized.

Do not lay lines close to power cables.

The distance to aerial lines, radios, and radar systems has to be at least 1 m.

To set the potentiometers and to check the current values, use the measuring adapter and measure the currents in a potential-free manner.

The specified maximum solenoid currents must not be exceeded.

Do not use solenoids with integrated free-wheeling diodes.

The supply voltage is to be protected by means of a fuse – see Technical data.

Notice:

The solenoids are controlled with a clocked voltage. The solenoid voltage impulse level corresponds to the applied operating voltage (+UB).

Solenoids with integrated EMC protection circuit may only be used if the response voltage of the protection circuit - for both, positive and negative voltage - is greater than the actual operating voltage.

The manufacturer's specifications of the valves are to be observed.

Notice:

With a strongly fluctuating operating voltage, it may in the individual case be necessary to use an external smoothing capacitor with a capacity of at approx. 470 µF to 2200 µF.

The line length should not exceed 50 m. For longer lines, a capacitor with C ≥ 100 µF has to be connected between UB and 0 V. The line between capacitor and plug-in amplifier must not exceed 50 m.

Recommendation: VT 11110 capacitor module (see data sheet 30750); sufficient for up to 5 plug-in amplifiers

VT-SSPA1-5-1X/V0/0-24/K24

Manufacturer: Bosch Rexroth

Material #: R901238530

Model : VT-SSPA1-5-1X/V0/0-24/K24

More are expected on May 16, 2025

Command value presetting

Ramp generator

Characteristic curve

Power output stage

General

Voltage supply

Analog inputs

Solenoid outputs

Adjustment options

Supplementary information

Terminal connection

Terminal connection

M12 connector, top view

2-conductor technology

2-conductor technology

3-conductor technology

3-conductor technology

4-conductor technology

4-conductor technology

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