BOSCH REXROTH
R978033241

$3,673.15 USD

BOSCH REXROTH
Material:R978033241
Model:VT-SR2-1X/1-60/ES43A8-3973/2A1-2A25

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***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-SR2-1X/1-60/ES43A8-3973/2A1-2A25 (R978033241) is a sophisticated valve amplifier designed for precise control in hydraulic systems. This high-quality component operates with a push-pull output stage that uses bipolar transistors, ensuring reliable operation and performance. The output can be engaged or disengaged through an enable circuit relay, which is conveniently indicated by an LED on the front panel. Equipped with an integrated I controller and a dither signal generator, this valve amplifier allows for smooth and accurate control of prestage current values. These values are further refined by a PD controller that receives position command values, while the D share affects only input. Users can easily monitor the actual current value thanks to the measuring instrument displayed on the front plate. For fine-tuning purposes, the zero point adjustment is accessible via R NP from the front panel, providing users with additional control over system calibration. The device requires a symmetric operating voltage (UB), which is safeguarded against reverse polarity to prevent potential damage. In terms of customization, this model has options available such as a PID controller with switchable PI share for additional control loops like drive control. It also features a backup relay with potential-free changeover contact capable of handling up to V and A loads. This relay's status is indicated by LEDs on the device's front. Designed in Eurocard format as part of component series X, this valve amplifier is compatible with various Bosch Rexroth valves including WSEMX series models. Its robust construction without voltage regulator necessitates an auxiliary stable voltage (UM) supply for its electronics, which also includes reverse polarity protection up to A. Overall, the Bosch Rexroth VT-SR2-1X/1-60/ES43A8-3973/2A1-2A25 offers precise flow control capabilities ideal for complex hydraulic applications requiring meticulous modulation of valve currents and positions.

The valve amplifiers operate with a push-pull output stage with bipolar transistors. The output of this output stage can be connected or disconnected by means of an enable circuit (relay K2). The enable is indicated by the LED "H2" on the front plate being illuminated. The switching voltage of all relays is defined by means of jumpers J12 and J13 to either 0 V or +UB (factory +UB).

The output stage consists of an I controller with connected dither signal generator. The amplitude of the dither signal is set by means of R7. The pre-stage (current command value) is controlled via a PD controller. The actual current value returned is simultaneously indicated by the instrument on the front plate.

The PD controller is supplied the position command value with the D share only affecting input 3.

The zero point can be set via R3 (NP) from the front plate.

The required symmetric operating voltage +UB is protected against reversed polarity. The design without voltage regulator requires an additional stable auxiliary voltage (±UM) to supply the controller electronics. The auxiliary voltage port is protected against reversed polarity up to a maximum current of 1 A.

As an option, the amplifier can be equipped with a PID controller (D share only affects the actual value) with a switchable PI share and a backup relay with potential-free changeover contact. This controller can be used to superimpose a further control loop (e.g. for drive control). The P and D share can be set at the front plate. The controller switching status is indicated by the LED "H1", the relay at LED "H3" (LEDs illuminated if relays are applied). The PID controller fitting is customer-specific and therefore has to be specified in the order in plain text. These amplifiers receive a special type designation upon delivery. The backup relay is loadable up to 28 V and 2 A.

01	Valve amplifier for servo valves without electrical position feedback	VT-SR2

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

03	Without ±15 V voltage regulator	0
03	With ±15 V voltage regulator	1

04	60 mA valve flow (for valves: 4WS2EM 6-2x, 4WS2EM 10-5x)	60
04	100 mA valve flow (for valve: 4WS2EM 16-2x)	100

05	Further details in the plain text	*

01		02		03		04	05
VT-SR2	‒	1X	/		‒		*

General

Type / version	VT-SR2-…/...-60	VT-SR2-…/...-100
Component series	1X
Type of electronics	Analog
Design	Euro-card

Voltage supply

Type / version					VT-SR2-…/...-60	VT-SR2-…/...-100
Operating voltage	with integrated voltage regulator		UB	V	± 24
		Upper limit value	UB(t)max	V	± 28
		Lower limit value	UB(t)min	V	± 22
	without integrated voltage regulator		UB; UM	V	±24; ±15.0
		Upper limit value	UB(t)max; UM(t)max	V	±28; ±15.2
		Lower limit value	UB(t)min; UM(t)min	V	±22, ±14.8
Current consumption	max.		Imax	V	0.15 A

Analog inputs

Type / version					VT-SR2-…/...-60	VT-SR2-…/...-100
Command value	Voltage	grounded on one side, first input 1)	Ue	V	0 … ±10
		grounded on one side, second input 2)	Ue	V	0 … ±10

1)	RE = 50 kΩ
2)	RE = 50 kΩ, J9 gesteckt

Digital inputs

Type / version				VT-SR2-…/...-60	VT-SR2-…/...-100
Enable 1)	On (active)	Ue	V	+24 (with J13); 0 (with J12)
Controller change-over 1)		Ue	V	+24 (with J13); 0 (with J12)
Backup relay 1)		Ue	V	+24 (with J13); 0 (with J12)

1)	RE = 700 Ω (relay)

Analog outputs

Type / version				VT-SR2-…/...-60	VT-SR2-…/...-100
Valve flow command value	Voltage	UO		-10 V ≙ +60 mA (J10 plugged)

Solenoid outputs

Type / version				VT-SR2-…/...-60	VT-SR2-…/...-100
Solenoid current	max.	Imax	mA	60	100
Dither signal		f	Hz	340 ±5 % (Ipp = 3 mA)

Position transducer

Type / version			VT-SR2-…/...-60	VT-SR2-…/...-100
Oscillator frequency	f	kHz	5

Other information

Type / version				VT-SR2-…/...-60	VT-SR2-…/...-100
Relay	Pickup voltage		V	+24 (UB)
	Nominal voltage	U	V	26
	Response voltage	U	V	13
	Step-back voltage	U	V	1.3 ... 6.5
	Switching time	t	ms	4
	Coil resistance at 25 °C	R	Ω	700
Reference voltage	Potentiometer supply	U	V	±15 ±2 % (Imax = 150 mA)
Anschlussart				32-pole male multipoint connector, DIN 41612, design D
Ambient temperature range		ϑ	°C	0 … 50
Storage temperature range		ϑ	°C	-20 … 70
Weight		m	kg	0.2

For applications outside these parameters, please consult us!

technical illustration-R978033241-Voltage input Controller for valve flow Enable input Output stage with dither signal Measuring instrument for valve flow display Reverse polarity protection for the operating voltage

The amplifier card may only be unplugged and plugged when de-energized.

Command values may only be switched via relays with gold-plated contacts (low voltage, low currents).

Card relays may only be switched (enable, controller change-over, reserve) using contacts with a load capacity of approx. 40 V; 50 mA.

Always shield command and actual value cables; connect shielding to ground (⊥) on the card-side, open at one side.

Do not lay signal lines close to power lines.

Recommendation:

Also shield the solenoid conductors (to ⊥ on one side).

Up to a length of 50 m, use cable type LiYCY 1.5 mm2, for longer lengths please ask.

BOSCH REXROTHR978033241