Bosch Rexroth VT-VSPA1-1 User Manual

1/12
Electrical amplifiers
Type VT-VSPA1-1 and VT-VSPA1K-1
Component series 1X
RE 30111/09.05
Replaces: 02.03
Table of contents
Contents Page
Features 1
Ordering code 2
Functional description 2 and 3
Block circuit diagram / pin assignment VT-VSPA1-1 4
Block circuit diagram / pin assignment VT-VSPA1K-1 5
Technical data 6
Output characteristic curves 7
Indicator / adjustment elements 8 and 9
Meaning of DIL switches 10
Unit dimensions 11
Engineering / maintenance notes / supplementary in for ma tio n 11
Troubleshooting 12
Features
– Suitable for controlling all direct and pilot operated proportion-
al pressure control valves without electrical position feedback
and only one solenoid as actuator that are available at the time
of publication of this data sheet
– Differential input, can be switched between voltage and cur-
rent input
– Additional command value input, 0 to +9 V
–
Ramp generator, can be adjusted separately for up and down ramps
– Clocked output stage
– Signal "ready for operation" (VT-VSPA1K-1 only with LED
indicator lamp)
– Reverse polarity protection for voltage supply
– Cable break detection of current input 4 to 20 mA
– Short-circuit protection of solenoid cable
– Cable break detection of solenoid cable
H5897_d
Suitable card holders for VT-VSPA1-1:
– Type VT 3002-2X/32, see RE 29928
Single card holder without power supply unit
Suitable power supply unit:
– Type VT-NE30-1X, see RE 29929
Compact power supply unit 115/230 VAC → 24 VDC, 108 W

Bosch Rexroth VT-VSPA1-1 Specifications

General

Command value	±10 V
Ramp time	Adjustable
Enable input	24 V DC
Protection Class	IP20
Supply voltage	+24 V DC
Operating Temperature	0 to +50 °C
Storage Temperature	-20°C to +70°C

Summary

Electrical Amplifiers

Key Features

Lists key capabilities and functionalities of the amplifier types.

Ordering Code

Functional Description

External Command Value Input

Details how external voltage or potentiometer provides command value.

Internal Command Value Input

Explains using the internal potentiometer for command value.

Differential Input Configuration

Describes the differential input for voltage or current signals.

Ramp Generation Control

Covers adjustment of ramp times for up and down signals.

Block Circuit Diagram VT-VSPA1-1

Block Circuit Diagram VT-VSPA1K-1

Technical Data

Input Specifications

Specifies the voltage and current ranges for command value inputs.

Output Specifications

Details solenoid current, biasing current, and clock frequency outputs.

Connection Types and Dimensions

Describes connection methods, card, and front panel dimensions.

Output Characteristic Curves

Linear Characteristic Curve

Illustrates the basic linear relationship between command value and output current.

Firmly Set Characteristics

Shows output characteristics with pre-set or adjusted curves.

Indicator and Adjustment Elements

LED Indicator Lamp

Details the 'ready for operation' LED status indicator.

Potentiometer Adjustments

Details potentiometers for biasing current and max command value.

DIL Switch Settings

Describes DIL switch groups and their settings.

Ramp Time Adjustments

Covers potentiometers for setting ramp times.

DIL Switch Assignment to Valve Types

Maps DIL switch settings to specific valve types and functions.

Potentiometer Functionality Explained

Details the operation of 'Zw' and 'Gw' potentiometers.

Meaning of DIL Switches

Switch Settings for Valve Types

Details DIL switch configurations for various valve types and amplifier cards.

Independent Adjustment Options

Explains settings for command value 2 and ramp time independent of valve type.

Unit Dimensions

Engineering, Maintenance, and Supplementary Information

General Operating Notes

Covers parameter settings, installation, and measurement requirements.

Electrical Safety and Connection Precautions

Details isolation, cable shielding, and safety-relevant function notes.

Troubleshooting Guide

Troubleshooting Steps

Step-by-step guide for diagnosing and resolving amplifier operability issues.

Fault Signalization Notes

Explains fault signals like LED 'H2' status for overloads or cable breaks.