Category: ABB

Introduction

For a classified Ex zone 1 area, the rationale behind

this “Zone 2 by design” analyzer is that the analyzer

must remain safe when operated in an abnormal

condition. In the event of a fault, the PGC5000

provides continual protection:

•    Should a failed component become ignition

capable, the pressurization system prevents the

components from being exposed to flammable

gases or vapors.

•    Should a failed pressurization system expose the

internal components to flammable gases or

vapors, the analyzer’s alarm provision will alert the

user of the failure.

Neither of these single faults would present a

hazard to the potentially explosive atmosphere;

therefore, electrical power interlock is not required

for this type of pressurization protection. Enclosure

doors are not required to be interlocked so that the

electrical supply is disconnected automatically

when doors are opened. The requirement is simply

an alarm provision since there are no hazards inside

the enclosure when in normal operation.

The zone 1 certified PGC5000 analyzer offers simple

pressurization protection, commonly referred to as

Ex ‘py’ or “Y-purge”. This enclosure pressurizing

technique is made possible by ensuring that the

internal components within the analyzer are not

capable of causing an ignition in normal operation,

thus allowing for a reduction in classification within

the protected enclosures from zone 1 to zone 2.

Main disconnecting device

The drive is always equipped with a main disconnecting device.

The device is either the main switch-disconnector inside the module (no option +F253 or +F255),

the main switch-disconnector outside the module (option +F253),

or the main breaker outside the module (option +F255). 

The user operates the main switch-disconnector(s) with a handle on the cabinet door.

The breaker is withdrawable; its must be racked out when disconnection is needed.The supply unit control

program runs in the RDCU control unit located in the swing out frame. 

The RDCU is connected to the supply modules by a fibre optic link, and a separate wire set.

If there are parallel supply modules, the controls from the RDCU are distributed

to the modules with an optical branching unit (APBU board).

The RDCU is also connected to the inverter unit with a fibre optic link and to the panel through the panel

link.

Typically, the user controls the supply unit with the control devices mounted on the cabinet door.

The use of these control devices is described in the following subsections.

No additional control devices or connections are needed.

However, it is also possible to control the unit with the control panel and through the fieldbus.

Cabinet line-up

The drive consists of several cubicles that contain the supply and motor terminals,

1 to 4 diode supply module(s), 2 to 6 inverter modules, and optional equipment.

The actual arrangement of the cubicles vary from type to type and the selected options.

Controls of the supply unit

The supply unit control program runs in the RDCU control unit located in the swing out frame. 

The RDCU is connected to the supply modules by a fibre optic link, and a separate wire set.

If there are parallel supply modules, the controls from the RDCU are distributed

to the modules with an optical branching unit (APBU board).

The RDCU is also connected to the inverter unit with a fibre optic link and to the panel through the panel

link.

Typically, the user controls the supply unit with the control devices mounted on the cabinet door.

The use of these control devices is described in the following subsections.

No additional control devices or connections are needed.

However, it is also possible to control the unit with the control panel and through the fieldbus.

* Output contact functions can be freely configured according to requirements

* Two galvanically isolated digital inputs, three additional galvanically isolated digital inputs on the

optional RTD module

* Interference recorder:

* Recording time up to 80 seconds.

* Triggered by one or more internal or digital input signals

* Records four analogue channels and up to eight user-selectable digital channels

* Adjustable sampling rate

* Non-volatile memory for

* Up to 100 time-stamped event codes

* Set values

* Interference logger data

* Time-stamped logged data for the last five events

* Operating indication messages and LEDs showing status in case of power failure

* HMI with alphanumeric LCD and navigation buttons

* Eight programmable LEDs

* Multiple language support

* User-selectable password protection for the HMI

* Display of primary current value

* Demand value

* All settings can be modified via PC

* Optical front communication connection: wireless or cable

* Optional rear communication module with plastic fibre, combined fibre (plastic and glass) or RS-485

connection.

for system communication using SPA bus, IEC 60870-5-103 or Modbus (RTU and ASCII) communication

protocols.

* Battery backup for real-time clock

* Battery charge monitoring

* Continuous self-monitoring of electronics and software

* Removable plug-in unit

Features

* Three-phase motor start monitoring based on thermal stress calculation with speed switch blocking

function

* Three-phase overcurrent protection with timing characteristics and speed switch latching function

* Three-phase short circuit protection with instantaneous or timed characteristic

* Three-phase undercurrent (loss of load) protection with timed characteristic

* Non-directional earth fault protection with timing characteristics.

* Three-phase thermal overload protection

* Three-phase unbalance protection based on negative phase sequence currents with inverse definite

minimum time characteristic

* Inverted phase protection based on negative phase sequence current

* Accumulated start-up time counter with restart inhibit function

* Circuit breaker fault protection

* Temperature protection stage with timing characteristics

* Emergency start function

* Optional RTD module

* With six measurement inputs

* Supports PTC thermistors and various RTD sensors

* Three additional galvanically isolated digital inputs

* Four precise current inputs

* Time synchronisation via digital inputs

* Trip circuit monitoring

* User selectable rated frequency 50/60 Hz

Physical specifications

Materials

Case

Glass fiber reinforced, flame resistant, anti-static PA6 nylon

compound

Keyboard

Polyester

Protective shell

Silicone rubber

Carrying bag

Anti-static polyester

Keypad

single sheet molded dome switches with tactile feedback with

– 4 keys for navigation

– 7 single function keys for editing and operation

– 12 multifunction keys for alphanumeric and symbols

Display

Wide screen LCD, 128 x 64 pixel,

52.5 x 27.2 mm (2.06 x 1.07 in.) dot matrix.

Connections

— to the transmitter: 2 standard banana jacks,

suitable for 1.5 m (5 ft) leadset with insulated minigrabbers

and alligator clips (provided).

— to the PC: USB port (type B) suitable for cable (provided),

to allow software and DD upgarde and to use the DHH805

in modem functionality.

— to the battery recharger: 5 mm dia. socket with inner pin

as positive pole.

Weight (without accessories)

0.95 kg approx (2 lb)

Add 450g (1 lb) for carrying case.

Packing

Carton including all accessories and documentation.

Standard delivery items

DHH805A is delivered in a hard plastic case including

— battery assemblies (rechargeable and disposable versions)

— power adapter/battery recharger with universal plugs

— elastic handle strap and rubber shell

— USB cable and leadset to the transmitter with minigrabbers

— soft carry bag with adjustable shoulder strap

— DVD with PC-Tool software and HART DD library

Functional specifications

Memory

2 GB memory card (SD)

Power supply

—  Four type AA 1.5 V disposable alkaline batteries (provided).

—  Rechargeable Ni-MH battery sealed pack (provided).

Countinuous run time

— 100 hours approx without backlit

— 60 hours approx with minimum backlit

— Programmable auto power-off.

Operative limits

Temperature limits:

Ambient

is the operating temperature–10 and +70 °C (+14 and +158 °F)

Storage–20 and +70 °C (–4 and +158 °F)

With rechargeableI battery pack temperature must not exceed

55 °C (131 °F)

Environmental limits

Humidity

Relative humidity: up to 100 %.

Condensing, icing: admissible

Hazardous atmospheres

INTRINSIC SAFETY

ATEX Europe approval: II 1 G Ex ia IIC T4 Ga

IEC Ex approval: Ex ia IIC T4 Ga

NEPSI China (PENDING): Ex ia IIC T4

FM Approvals US– Nonincendive: Class I, Div. 2. Gr. A, B, C, D, T4– Intrinsically safe: Class I, Div. 1. Gr. A, B, C, D, T4

Class I, Zone 0. AEx ia IIC T4

Class I, Zone 2. IIC T4

FM Approvals Canada: Class I, Zone 0. AEx ia IIC T4– GOST (Russia, Kazakhstan, Belarus), Inmetro (Brazil) based on ATEX

Refer to certificate for ambient temperature range (within the

limit of -10 to 50°C) related to the different equipment

operations (for example the charging).

Use cases

The Mobility DHH805 supports a wide range of functions that

can help to reduce costs by saving time in start-up, day-to

day operations, and maintenance activities. It powers up

quickly, typically in less than 2 seconds, and it easily connects

with device terminals and/or wiring, making it readily available

to begin configuration and/or troubleshooting.

On power-up, the Mobility DHH805 searches for a connected

device, and upon finding it, the DHH805 display identifies

the device and reveals a wealth of information about the

device in display area including the device’s key variables and

status.

The large 1000-device memory capacity allows the Mobility

DHH805 to be used in the field for long periods of time

without having to return back to upload it’s saved data.

The Mobility DHH805 includes a Review/Edit function that

allows a user to scroll online or offline through every HART

accessible parameter without having to memorize varying

menu structures from different instrument suppliers. This time

saving feature along with thumb key access and the Mobility

DHH805’s ergonomic design that allows it to comfortably fit in7U

your hand, makes single-handed operation in any location,

including hard-to-access places, the often preferred method of use.

Below are some of the typical ways that the Mobility DHH805

can be used.

Devices commissioning

— Step-by-step configuration

— Document as-left configuration

— Electronic Birth Certificate

Operations

— Reconfiguration for process changes

— Reconfiguration for batch runs

— Document as-found and as-left configurations

Device Maintenance

— Troubleshoot devices with HART

— View device error messages

— Clone devices to commission replacements

— Preventive review of device status

The large 1000-device memory capacity allows the Mobility

DHH805 to be used in the field for long periods of time

without having to return back to upload it’s saved data.

The Mobility DHH805 includes a Review/Edit function that

allows a user to scroll online or offline through every HART

accessible parameter without having to memorize varying

menu structures from different instrument suppliers. This time

saving feature along with thumb key access and the Mobility

DHH805’s ergonomic design that allows it to comfortably fit in

your hand, makes single-handed operation in any location,

including hard-to-access places, the often preferred method

of use.

Device Functions

– Updates to new device configuration files and firmware via internet connection

– Dedicated memory for over 2000 HART device profiles

– Record and store over 1000 device profiles

– Clone/upload/download configurations

– Offline mode for developing/reviewing configurations

– Upload and log device configurations using DHH utility

– Backlit 6-line dot matrix graphic display

– Edit directly in review/edit mode

– HART Menu Home Key

– Programmable lock settings

– Contrast adjustment

– Elasticated hand strap and adjustable, removable suspension strap

– Customised “use in place” soft case with lead kit compartment

Supported HART commands

— Universal, Common Practice and Device Specific

Time saving engineering

— Clone/upload/download configurations

Remote configuration

— Off-line mode for developing/reviewing configuration

User Interface– Simple, easy-to-read dot matrix graphic display backlight