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Bosch REXROTH VT-HDT Series User Manual

Bosch REXROTH VT-HDT Series
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Bosch Rexroth GmbH Austria V1.08 / 2019-01 Page 1
VT-HDT Box
Test device for proportional valves with
integrated electronics (OBE)
Type VT-HDT-1-2X Operating Manual
The test device is suitable for the controlling and functional testing of proportional valves with integrated
electronics (OBE) with an operating voltage of +24V.
Test device VT-HDT-1-2X Test device VT-HDT-1-2X
Features
The test device simplify the commissioning and troubleshooting
of hydraulic systems with proportional valves with integrated
electronics
Simple and intuitive operation via touchscreen
Screens for digital or analog display
Automatic valve detection
Setpoint generator with interval function
Ramp function
Potentiometer operation
Dead man´s handle
2 outputs for switching valves
Sockets for external measurements
Service case with test device, 24 V power supply, OBE connection
cable and 2 cables for switching valves (see ordering information)
Service case VT-HDTSY-1-2X
Notice:
The test device might only be used by persons who are familiar with the device, the valve, and the hydraulic
system. With the corresponding setting, the control signals coming from the system are going to be ignored.
If control-side safety regulations are provided, they are thereby rendered inoperable.
The use of the device on running systems is always at your own risk!
No liability will be accepted for damage caused by incorrect operation!
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Bosch REXROTH VT-HDT Series Specifications

General IconGeneral
Supply voltage24 VDC
Max Operating Pressure350 bar
Housing MaterialAluminum
Seal MaterialNBR
Protection ClassIP65
SeriesVT-HDT
Voltage24 V

Summary

VT-HDT Box Overview

Key Features

Highlights the test device's role in simplifying hydraulic system commissioning and troubleshooting.

Important Usage Notice

Critical warnings for users, emphasizing familiarity with the system and operating at own risk.

Ordering and Contents

Product Ordering Codes

Lists part numbers and types for the test device, cables, and power supply unit.

Safety Warnings

Emphasizes qualified personnel, intended use, correct connections, and careful handling.

Device Functionality and Setup

Appropriate Use Cases

Details the test device's intended use for proportional valves with OnBoard Electronic (OBE).

Touchscreen Operation

Describes the brightly lit TFT touchscreen, its intuitive use, and resistive nature.

General Connection Conditions

Explains voltage application to terminals A, B, D, E and setpoint/actual value connections F, C.

Special Range Setting

Covers the '24V-> C, F: B (E)' range setting and its implications for terminal connections.

Range Setting Warning

Warns about potential defects or machinery movement from the '24V-> C, F: B (E)' setting.

Operating Modes Explained

External Mode Functionality

Signals are looped through and measured; setpoint specification is not possible.

Simulator Mode Operation

Internal setpoint generation and output; setpoint adjusted via potentiometer or touchscreen.

Dead Man's Handle Feature

Required for system work; setpoint active only when button is pressed.

Mode Operation Warnings

Safety notes for 'Simulator mode' and the 'Dead man's handle' not being a safety device.

Advanced Operations

Potentiometer Control

Setpoint adjustment using a potentiometer; touch functions are inactive.

External Measurement Sockets

Sockets for recording setpoint and actual values with external devices like data loggers.

Measuring Input Attention

Cautionary note to connect only devices with potential-free measuring inputs.

Analog Curve Display

Option to display setpoint, actual value, Uv, and Iv in the ANALOG screen.

Device Functions

Automatic Valve Detection

Detects valve plugging/unplugging and identifies V- or mA range for selection.

Ramp Functionality

Setpoint output via a ramp function with adjustable steepness and rate.

Function Interval Setting

Enables automatic setpoint output with adjustable profiles and timed intervals.

Internal mA Resistance

Switchable resistance for accurate 'Actual value' readout in external mode without external burden.

Screen Navigation and Display

Range Screen Details

Shows available ranges, selection logic, and standard/special connection configurations.

Digital Display Values

Displays power supply, setpoint, and actual values digitally, with control options.

Display and Settings Screens

Analog Display Values

Presents analog curves for setpoint, actual value, Uv, and Iv.

System Settings Configuration

Allows configuration of Dead Man's Handle, Potentiometer, Valve Detection, Ramp, and Interval.

Device Architecture

Device View Layout

Illustrates the physical layout of the test device, including input/output ports and controls.

Electrical Connections

Details the input/output connectors and switching valve connections with material specifications.

Technical Specifications

Mechanical Properties

Provides dimensions, weight, protection rating, temperature, and humidity parameters.

Electrical Characteristics

Outlines supply voltage, current, protection, fuses, output voltage, and burden resistance.

Connection Interfaces

Specifies connector types and part numbers for valve input/output and measuring sockets.

Accessory Components

Service Case VT-HDTSY-1-2X

Details the service case design, dimensions, and included components like the test device and power supply.

VT-HDTNT-5-2X Power Supply

Technical data for the power supply unit, including operating voltage, current consumption, and dimensions.

Cables and Connectivity

OBE Connection Cable

Information on the OBE connection cable, its connectors, and length for linking the test device to valves.

Switching Valve Cable

Details the switching valve cable, its connectors, and length for connecting to switching valves.

Environmental and Disposal Information

Environmental Protection Aspects

States that the products contain no hazardous substances and have no negative environmental impact.

Product Disposal Guidelines

Provides instructions for returning products for disposal and handling of packaging materials.

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