Category: ABB

ABB MeasureSafety

General information and instructions

These instructions are an important part of the product and

must be retained for future reference.

Installation, commissioning, and maintenance of the product

may only be performed by trained specialist personnel who have

been authorized by the plant operator accordingly. The specialist

personnel must have read and understood the manual and must

comply with its instructions.

For additional information or if specific problems occur that are

not discussed in these instructions, contact the manufacturer.

The content of these instructions is neither part of nor an

amendment to any previous or existing agreement, promise or legal relationship.

Modifications and repairs to the product may only be performed

if expressly permitted by these instructions.

Information and symbols on the product must be observed.

These may not be removed and must be fully legible at all times.

The operating company must strictly observe the applicable

national regulations relating to the installation, function testing,

repair and maintenance of electrical products.

The receiver electronics are connected to the transmitter electronics via a cable.

The absorbed signals detected from the photodetector are amplified and transmitted via this cable to the transmitter unit.

The same cable transmits the required power supply from the transmitter unit to the receiver unit.

The transmitter Al box contains the main electronic components.

The central processor board performs all instrument control and gas concentration calculations.

The main board contains all the electronics required for the operation of the instrument,

such as the diode laser current and temperature control as well as the analogue to digital signal conversion.

The display (LCD) continuously shows the gas concentration, laser beam transmission and instrument status.

an RS-232 port is available for direct serial communication with a PC.

An optional Ethernet board provides TCP/IP communication over a local area network (LAN) as an alternative to serial communication.

All cable connectors are Phoenix VARIOSUB type and are waterproof.

Introduction

As an integrated part of the Advance Optima series the LS25

can be combined with further analyzer modules and completely operated remotely in Ethernet networks.

The LS25 has ATEX, IECEx and CSA certificates for use in potentially explosive atmospheres.

The power supply unit converts 100-240 volts AC to 24 volts DC (24 volts DC can be supplied directly to the transmitter unit if available).

The power supply box is connected to the transmitter box by a cable. 4-20 mA input signal from external gas temperature/pressure sensor

can be connected to the screw terminals in the power supply box or directly to the cable connector on the transmitter unit.

The receiver electronics are connected to the transmitter electronics via a cable.

The absorbed signals detected from the photodetector are amplified and transmitted via this cable to the transmitter unit.

The same cable transmits the required power supply from the transmitter unit to the receiver unit.

The transmitter Al box contains the main electronic components.

The ABB 3ASC25H204 DAPU100 Control Module is an essential component for industrial automation

systems.

It integrates advanced control logic and communication capabilities,

ensuring seamless integration with other components in your system.

Designed with precision engineering, this module delivers consistent and reliable

performance even under demanding industrial conditions.

Its robust design ensures longevity and minimal downtime,

making it a cost-effective solution for your automation needs.

The DAPU100 module supports a wide range of operating voltages,

including 220V, and has an output frequency of 3ASC25H204 kHz,

making it suitable for various industrial applications.

Its lightweight design (0.08 kg) ensures easy installation and maintenance.

This module is part of the ABB 3ASC25H204 series, known for its high-quality standards and reliability.

It is certified and tested to meet international quality standards, providing peace of mind for users.

With custom processing options available, the ABB 3ASC25H204 DAPU100 can be

tailored to specific project requirements, ensuring optimal performance and compatibility with existing

systems.

Instrument Description

The analyser consists of 3 separate units:

 Transmitter unit with decontamination

 Receiver unit with decontamination

 Power supply unit

The transmitter unit consists of the laser module, the temperature stabilised diode laser,

the collimating optics and the main electronics in a coated aluminium case.

The receiver unit contains a focusing lens, photodetector and receiver electronics in a coated aluminium case.

Both the transmitter and receiver have an environmental protection rating of IP66.

The standard optical window is pressure resistant up to 5 bar (absolute pressure).

The monitor is mounted by assembling the transmitter and receiver with the supplied

purge and calibration unit and mounting to a DN50 process flange (see Figure 3-1).

Optical alignment is both simple and reliable, and the purge device prevents dust

and other contaminants from being deposited on the optical window.

The detector signal is spectrally decomposed into harmonic frequency components of the laser modulation frequency.

The second harmonic of the signal is used to measure the concentration of the absorbed gas.

Both line amplitude and line width are Both line amplitude and line width are extracted from the second harmonic line shape.

Therefore the measured concentration is not sensitive to changes in the line shape (line amplitude and line width).

The measured concentration is not sensitive to line shape changes (line width and line width) caused by background gases.

Note: The analyser measures only the concentration of free molecules in a given gas and is therefore not 

sensitive to molecules bound to other molecules in complexes and molecules attached to or dissolved in particles and droplets.

Care should be taken when comparing results with those obtained by other measurement techniques.

The receiver unit contains a focusing lens, photodetector and receiver electronics in a coated aluminium case.

Both the transmitter and receiver have an environmental protection rating of IP66.

The standard optical window is pressure resistant up to 5 bar (absolute pressure).

The monitor is mounted by assembling the transmitter and receiver with the supplied

purge and calibration unit and mounting to a DN50 process flange (see Figure 3-1).

Optical alignment is both simple and reliable, and the purge device prevents dust

and other contaminants from being deposited on the optical window.

Digital output

The alarms generated in the positioner can be polled via the

digital output as a collective alarm.

The desired information can be selected via the operator panel

or remotely via the configuration program.

The output can be set to “active high” or “active low”, as

required.

Digital input

For the digital input, one of the following safety options can be

selected. You may use the operator’s panel or configuration

program to select an option.

— No function (default)

— Move to 0 % position

— Move to 100 % position

— Hold previous position

— Disable local configuration

— Disable local configuration and operation

— Disable any access (no local or remote access via a PC)

The selected function is activated when the 24 V signal is no

longer connected to the digital input (< 11 V DC).

Switching points for the position

You can use these parameters to define two position limits for

signaling (see option “Module for digital position feedback”).

Digital output

The alarms generated in the positioner can be polled via the

digital output as a collective alarm.

The desired information can be selected via the operator panel

or remotely via the configuration program.

The output can be set to “active high” or “active low”, as required.

This parameter can be set separately for each end position.

When the respective configured limit value is exceeded, the

shut-off function causes immediate travel of the actuator until

reaching the set end position.

If the value “0” is entered for the corresponding parameter, the

position is further controlled, even in the respective end

position.

Shut-off function

This parameter can be set separately for each end position.

When the respective configured limit value is exceeded, the

shut-off function causes immediate travel of the actuator until

reaching the set end position.

If the value “0” is entered for the corresponding parameter, the

position is further controlled, even in the respective end

position.

Travel time prolongation

This function can be used to increase the max. travel time for

full travel. This time parameter can be set separately for each

direction.

This function can only be used with the pneumatics with the

safety function “fail-safe”.

Switching points for the position

You can use these parameters to define two position limits for

signaling (see option “Module for digital position feedback”).

The positioner has a local communication interface (LCI) as

standard. Additionally, a “HART communication” option for

communication via the 20 mA signal is available. Both

communications are based on the HART Protocol.

Alternatively, HART5 or HART7 are available.

Inputs / Outputs

In addition to its input for the analog position setpoint, the

positioner is equipped with a digital input which can be used

to activate control system functions in the device. A digital

output allows you to output collective alarms or fault messages.

Modular design

The basic model can be enhanced at any time by retrofitting

optional equipment.

Option modules can be installed for analog and digital position feedback.

Additionally, a mechanical position indicator, proximity

switches or 24 V microswitches are available for indicating the

position independently of the mother board function.