R978919118 - BuyRexroth

Manufacturer: Bosch Rexroth

Material #: R978919118

Model : VT-VSPA1-1-1X/SO43A-1729

$1,903.00 USD

More are expected on August 18, 2026

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Qty	Price	Savings
5-24	$1,855.42 USD	$47.58 USD
25+	$1,807.85 USD	$95.15 USD

Status: This product is temporarily out of stock.

Qty: Delivered as early as August 18, 2026 when ordered in

Differential input, switchable from voltage to current input Additional non-isolated command value input Ramp generator, separately adjustable for upwards and downwards direction Cable break detection for current input 4 to 20 mA Reverse polarity protection for the operating voltage Short-circuit protection and cable break detection of the solenoid conductor "Ready for operation" message Clocked power output stage

[ ] … Assignment to the block diagram

The ramp generator [4] output signal is forwarded to the summing amplifier [5] as current command value. Here, a voltage of +6 V corresponds to a command value of 100 %.

In the summing amplifier [5], the output signals of the characteristic curve generators [6 or 7] are added to the command value (can be selected by means of DIL switches  depending on the valve to be controlled). The current command value can be filtered by means of a connectible low pass. The current output stage [9] is controlled using the current controller [8]. In the current controller, the current command value is moreover modulated with the clock generator signal [10] (frequency can be programmed using the DIL switch). In the valve solenoid, the clocked actual current value acts like a constant current with superimposed dither signal. Type VT-VSPA1-1 has measuring sockets for the internal command value and the actual value.

The following is true for the command value:+6 V ≙ 100 %

The following is true for the actual value: 1 mV ≙ 1 mA

The “ready for operation” signal is output and the “H2” LED on the front plate (with VSPA1-1) or the “H2” LED (with VSPA1K-1) is illuminated if:

there is no short-circuit of the solenoid conductors and no overload of the output stage,

a command value is available (cable break detection),

there is no cable break of the solenoid conductor.

In case of a fault, the following applies:

The command value input 2 is a differential input [1] (0 to +10 V). By means of DIL switches , it can be configured as current input (4 to 20 mA or 0 to 20 mA). If the command value is specified by external electronics with a different reference potential (e. g. by a PLC), this input has to be used. When disconnecting or connecting the command value voltage, it has to be ensured that both signal lines are in each case separated from or connected with the input.

Before they are forwarded, both command values are summed up [2] and then reach a potentiometer [3] accessible at the front plate of the card which acts as attenuator and thus limits the maximum command value.

The downstream ramp generator [4] generates a ramp-shaped output signal from a given stepped input signal. The time constant of this signal can be separately adjusted for the upwards and downwards direction by means of two potentiometers. The specified ramp time refers to a command value step of 100 % and may be approx. 1  s or 5  s, depending on the setting by means of a DIL switch. If a command value step of less than 100 % is switched to the ramp generator input or if the attenuator [3] is effective, the ramp time will be correspondingly shorter.

To type VT-VSPA1-1, the following applies: By means of the external “Ramp Up/Down off” contacts, the upwards and downwards ramp times can be separately set to their minimum value (approx. 30 ms).

To type VT-VSPA1K-1, the following applies: By means of the external “Ramp off” contact, the upwards and downwards ramp times can be set to their minimum value (approx. 30 ms) together.

Notice:

If an external command value potentiometer is used, the internal potentiometer “Gw” [3] must be set to maximum or to the desired maximum pressure.

The command value voltage is specified at the command value input 1 either directly or via an external command value potentiometer by means of the regulated voltage +9 V of the power supply unit [14]. The reference potential for command value 1 is M0 (measurement zero). To this input, the following applies: +9 V ≙ +100 %.

Differential input (input 2)

Internal command value presetting

External command value presetting

Ramp “up/down” off
VT-VSPA1-1

Ramp off
VT-VSPA1K-1

	Outlet	LED
Short-circuit	low	off
Cable break	clocked	flashing

01	02		03		04		05
VT-VSPA1		‒	1	‒	1X	/	*

01	Valve amplifier for proportional pressure valves, analog, euro-card format	VT-VSPA1

02	With 32-pole male multipoint connector and front plate	No code
02	With 16-pole terminal strip, without front plate	K

03	For valves: DBEP 6(A/B) ...1X, DBE(M) 10 ...5X, DBE(M) 20 ...5X, DBE(M) 30 ...3X, (Z)DBE 6...1X, DRE(M) 10 ...5X, DRE(M) 25 ...5X, DRE(M) 32 ...4X, ZDRE 10 VP ...1X	1

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

05	Further details in the plain text	*

When replacing amplifiers VT 2000 (up to component series 4x) VT 2010, VT 2013 or VT 2023, the blind plate 4TE/3HE, material no. R900021004, must be ordered separately for the rack mounting.

General

Type / version	VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Type of electronics	Analog
Design	Euro-card

Voltage supply

Type / version				VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Operating voltage	nominal	U	V	24
	Lower limit value	UB(t)min	V	22
	Upper limit value	UB(t)max	V	35
Power consumption	max.	Smax	VA	50
Current consumption	max.	Imax	A	1.8
Fuse				2.5 A time-lag

Analog inputs

Type / version					VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Command value	Voltage (differential input)		U	V	0 ... 10
	Voltage (differential input)	Input resistance	R	kΩ	≥ 100
	Voltage	grounded on one side, first input	Ucommand	V	0 … 9
	Current		I	mA	4 … 20
	Current	Input resistance	R	Ω	100
Current			I	mA	0 … 20
Current	Input resistance		R	Ω	100

Digital inputs

Type / version				VT-VSPA1K-1-1X	VT-VSPA1-1-1X

Analog outputs

Type / version			VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Internal command value	U	V	0 ... 6
Actual current value	U	V	0 ... 1.6 (mV ≙ mA)

Digital outputs

Type / version				VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Ready for operation	On (active)	U	V		UB 1)
Ready for operation	Off (inactive)	U	V		0

1)	Imax = 50 mA, Ri = 10 kΩ

Solenoid outputs

Type / version					VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Solenoid current	max.		Imax	A	0.8
Coil resistance at 20°C			R(20)	Ω	19.5
Solenoid current	max.	alternatively	Imax	A	1.6
Coil resistance at 20°C		alternatively	R(20)	Ω	5.4
Clock frequency	Setting range	stepped	f	Hz	100, 200, 300, 370, ±10% in each case

Adjustment options

Type / version					VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Pilot current		with Imax = 0.8 A	I	mA	Adjustable: 50 or 100 mA
		with Imax = 1.6 A	I	mA	100
	Setting range	with Imax = 0.8 A	I	mA	0 ... 300 ±20 %
		with Imax = 1.6 A	I	mA	0 ... 600 ±20 %
Ramp time up/down	Ramp 1		t	s	0.03 … 1
	Ramp 2		t	s	0.03 … 5

Measuring sockets

Type / version				VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Command value 1)	"w"	Uw	V	0 ... 6
Actual value	I	i	A		0 ... 1.6 (mV ≙ mA)

1)	6 V ≙ 100 %, Ri = 1 kΩ

Displays

Type / version			VT-VSPA1K-1-1X	VT-VSPA1-1-1X
LED display	Green 1			Ready for operation

Other information

Type / version				VT-VSPA1K-1-1X	VT-VSPA1-1-1X
Reference voltage	Potentiometer supply	U	V	±9 ±1% (Imax = 25 mA)
Anschlussart				16-pole terminal strip	32-pole male multipoint connector, DIN 41612, design D
Ambient temperature range		ϑ	°C	0 … 50
Storage temperature range		ϑ	°C	-25 … 85
Weight		m	kg	0.1

For applications outside these parameters, please consult us!

Output characteristic curve with fixedly set characteristic

Linear output characteristic curve (basic characteristic curve)

Iv Pilot current characteristic curve 2 (qualitative representation)

I2 Setting range of the maximum command value with potentiometer “Gw”

1 Characteristic curve 1 (qualitative representation)

2 Characteristic curve 2 (qualitative representation)

I1 Pilot current setting range with potentiometer “Zw (R130)” on the printed circuit board

I2 Setting range of the maximum current with potentiometer “Gw” on the front plate

A Characteristic curve in the condition as supplied

Notice:

It has to be ensured before commissioning of the amplifiers that the DIL switches on the printed circuit board are set according to the relevant application.

Settings independent of the valve type (command value 2 and ramp time)

	Command value 2
	0 ... +10 V	0 ... 20 mA	4 ... 20 mA
S11 (BR11)	OFF	ON	ON
S12 (BR12)	OFF	ON	ON
S13 (BR13)	OFF	OFF	ON
	Maximum ramp time
	1 s	5 s
S14 (BR14)	OFF	ON

Meaning of the settings based on valve types or earlier VT20XX amplifier cards

DIL switch/ potentiometer ( ) applies to VT-VSPA1-1, component series 10	Valve types/amplifier cards
	DBE(M)T, DBE(M)30, DRE(M)30, 3DRE(M)10 1), 3DRE(M)16 1), DBEP6A, DBEP6B, 3DREP6A, 3DREP6B Pumps	DRE(M)10-5X, DRE(M)20-5X	DBE(M)10-5X, DBE(M)20-5X, 3DRE(M)10P-6X, 3DRE(M)16P-6X, ZDRE10, (Z)DBE6	DRE6, ZDRE6

	Characteristic curves
	Basic characteristic curve	Characteristic curve 1	Characteristic curve 1	Characteristic curve 2
	OFF	ON	ON	OFF
	OFF	OFF	OFF	ON
	Command value filter
		f-3dB = 4 Hz	f-3dB = 4 Hz	f-3dB = 2.5 Hz
	OFF	ON	ON	OFF
	OFF	OFF	OFF	ON
	maximum solenoid current 2)
	800 mA	800 mA	1600 mA	1600 mA
	ON	ON	OFF	OFF
	Clock frequency 3)
	200 Hz	200 Hz	300 Hz	370 Hz
	OFF	OFF	OFF	OFF
	ON	ON	OFF	OFF
	ON	ON	ON	OFF
	Pilot current basic setting
	100 mA	50 mA	100 mA	100 mA
	Upon operation of switch BR22, the pilot current is increased by 50 or 100 mA.
1) up to component series 5X 2) Any doubling of the maximum output current will double the setting range and the set pilot current. 3) For f = 100 Hz, the DIL switches S25, S26 and S27 must be brought into “ON” position.

Assignment of the DIL switch settings on the card to the valve types (see also sign on the printed circuit board)

Valve types	S15...S17 (BR15...BR17)	S21...S27 (BR21...BR27)	Setting for all valve types	S11...S14 (BR11...BR14)
DBE(M)T, DBE(M)30, DRE(M)30, 3DRE(M)10 1), 3DRE(M)16 1), DBEP6A, DBEP6B, 3DREP6A, 3DREP6B Pumps			Ramp time ↑ = 5 s ↓ = 1 s
DRE(M)10-5X, DRE(M)20-5X		2)	Command value 2
DBE(M)10-5X, DBE(M)20-5X, 3DRE(M)10P-6X, 3DRE(M)16P-6X, ZDRE10, (Z)DBE6		2)
DRE6, ZDRE6		2)
1) up to component series 5X 2) With type VT-VSPA1-1 (component series 10), the BR22 switch must be set to “ON” and the “R130” potentiometer must be rotated to the left stop in order to set the correct characteristic curve.With type VT-VSPA1-1 (from component series 11) and type VT-VSPA1K-1, switches S21 and S22 do not have any effect. The “Zw” potentiometer does not have to be operated.

DIL switch

BR11...BR17	DIL switch
BR21...BR27	DIL switch
S1X	DIL switch
S2X	DIL switch

Potentiometer

Gw	Amplitude attenuator
t ↗	Ramp time "Ramp up"
t ↘	Ramp time "Ramp down"
Zw, R130	Pilot current

Measuring sockets

w	Command value
I	Actual current value (mV ≙ mA)

LED displays

H2	Ready for operation (green)

VT-VSPA1-10-1X

VT-VSPA1-11-1X

Measurement zero (M0) is increased by 9 V as compared to the 0 V operating voltage

1	Differential input
2; 5; 15	Summing device
3	Amplitude attenuator
4	Ramp generator
6; 7	Characteristic curve generator
8	Current controller
9	Power output stage
10	Clock generator
11	Proportional solenoid
12	Command value monitoring
13	Monitoring systems
14	Power supply unit
16	Low pass filter
H2	“Ready for operation” display
Gw	Amplitude attenuator
t	Ramp time setting
Zw (R130)	Additional pilot current settings
S1X, S2X	See Operating and display elements

1	Differential input
2; 5; 15	Summing device
3	Amplitude attenuator
4	Ramp generator
6; 7	Characteristic curve generator
8	Current controller
9	Power output stage
10	Clock generator
11	Proportional solenoid
12	Command value monitoring
13	Monitoring systems
14	Power supply unit
16	Low pass filter
17	"Ready for operation" output
H2	“Ready for operation” display
Gw	Amplitude attenuator
t	Ramp time setting
Zw (R130)	Additional pilot current settings
S1X, S2X	See Operating and display elements

Type M-3SE 6.6X/420LG..NXDZ2/V

Dimensions in mm

Type M-.SH…

Dimensions in mm

It has to be ensured before commissioning of the amplifiers that the DIL switches on the printed circuit board are set according to the relevant application.

In the condition as supplied, the parameters are set as follows:
max. ramp time = 5 s, pilot current = 100 mA, max. output current = 800 mA, clock frequency = 200 Hz.

The amplifier card may only be assembled when de-energized.

No connectors with free-wheeling diodes or LED displays must be used for solenoid connection.

Only carry out measurements at the card using instruments Ri > 100 kΩ.

Measurement zero (M0) is increased by +9 V compared to 0 V operating voltage and not isolated, i.e. –9 V regulated voltage  0 V operating voltage. Thus, do not connect measurement zero (M0) to 0 V operating voltage.

For switching command values, relays with gold-plated contacts have to be used (low voltages, low currents).

Always shield command value lines, connect shielding to earth on the card-side, other side open. The card has to be connected to the earth via terminal 6 or 8. If no system earth exists, connect 0 V operating voltage.

Recommendation:
Also shield the solenoid conductors. For solenoid conductors up to 50 m in length, use the line type LiYCY 1.5 mm2. For greater lengths, please contact us.

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

Do not lay solenoid conductors and signal lines near power lines.

The charging power of the smoothing capacitor on the card requires the pre-fuses to be of a slow-blowing characteristic.

If the differential input is used, both inputs must always be connected or disconnected simultaneously.

Troubleshooting

If the amplifier cards do not function, the following steps are required for troubleshooting:

Operating voltage available~^&@@&^~
Measurement of contacts 24(ac) against 18(ac)

Fuse on card faulty~^&@@&^~

Internal ±9 V operating voltage available on the card~^&@@&^~

If the internal command value potentiometers are used, is the bridge from 10(ac) to 12(ac) available~^&@@&^~

Is the external potentiometer correctly connected~^&@@&^~

Is the differential input connected correctly~^&@@&^~
Check:reference potential at 30(ac), 0 to +10 V at 28(ac)

Is the solenoid correctly connected~^&@@&^~
If the card is removed, a resistance of approx. 20 Ω to 30 Ω or 5 Ω to 8 Ω has to be measurable between contacts 22(ac) and 20(ac) depending on the valve type.

The amendment of the connection designations in brackets only applies to type VT-VSPA1-1.

Notice:

The output stage switches off at overtemperature (e. g. due to overload). This error is displayed by the “H2” LED going out.

In case of cable break of input "4 to 20  mA”, the “ready for operation” signal is reset and the “H2” LED will go out as well.

From component series 11, the following applies:
In case of short-circuit or cable break of the solenoid conductor, the ready for operation output will clock and the “H2” LED will flash with a frequency of 0.5 to 2 Hz as soon as the command value is simultaneously > 2 %.

Manufacturer: Bosch Rexroth

Material #: R978919118

Model : VT-VSPA1-1-1X/SO43A-1729

More are expected on August 18, 2026

Differential input (input 2)

Internal command value presetting

External command value presetting

Ramp “up/down” off
VT-VSPA1-1

Ramp off
VT-VSPA1K-1

General

Voltage supply

Analog inputs

Digital inputs

Analog outputs

Digital outputs

Solenoid outputs

Adjustment options

Measuring sockets

Displays

Other information

Output characteristic curve with fixedly set characteristic

Linear output characteristic curve (basic characteristic curve)

Settings independent of the valve type (command value 2 and ramp time)

Meaning of the settings based on valve types or earlier VT20XX amplifier cards

Assignment of the DIL switch settings on the card to the valve types (see also sign on the printed circuit board)

DIL switch

Potentiometer

Measuring sockets

LED displays

VT-VSPA1-10-1X

VT-VSPA1-11-1X

Type M-3SE 6.6X/420LG..NXDZ2/V

Type M-.SH…

Troubleshooting

Related Products

Information

Account

Manufacturer: Bosch Rexroth

Material #: R978919118

Model : VT-VSPA1-1-1X/SO43A-1729

More are expected on August 18, 2026

View Bulk Pricing Discounts

Differential input (input 2)

Internal command value presetting

External command value presetting

Ramp “up/down” off VT-VSPA1-1

Ramp off VT-VSPA1K-1

General

Voltage supply

Analog inputs

Digital inputs

Analog outputs

Digital outputs

Solenoid outputs

Adjustment options

Measuring sockets

Displays

Other information

Output characteristic curve with fixedly set characteristic

Linear output characteristic curve (basic characteristic curve)

Settings independent of the valve type (command value 2 and ramp time)

Meaning of the settings based on valve types or earlier VT20XX amplifier cards

Assignment of the DIL switch settings on the card to the valve types (see also sign on the printed circuit board)

DIL switch

Potentiometer

Measuring sockets

LED displays

VT-VSPA1-10-1X

VT-VSPA1-11-1X

Type M-3SE 6.6X/420LG..NXDZ2/V

Type M-.SH…

Troubleshooting

Related Products

Information

Account

Ramp “up/down” off
VT-VSPA1-1

Ramp off
VT-VSPA1K-1