Dräger Polytron 2 XP Tox Operating Manual

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Polytron 2 XP Tox

Transmitter for Electrochemical Sensors

Operating Manual

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Operation Installation Diagrams Installing Electrical Connections at the Transmitter Hart® Multidrop Installation

2.2.1.2 HART® Multidrop Installation

• Unscrew cover from transmitter.

• Lift the handle and pull the bucket with the electronics out of the enclosure.

• Turn the bucket over and pull off the 5-pin connector.

• Simply connect the incoming and outgoing three wires for power and signal to the terminal, as indicated on the label on the bottom of the bucket.

• Plug connector back into socket.

• The cable shielding should be connected at the controller only.

• Place bucket back into the enclosure.

• Screw cover back on, until it is seated.

All transmitters need to be setup individually. Transmitters on the same multidrop line must each be configured to a different “polling address”

which is between “1” and “15” (Section 5.9, Communication).

The address numbers should start with “1”, be consecutive, and may not

be used twice. The number of transmitters on one loop may not exceed

15 and is dependent on the power supply and cable used.

The permissible loop resistance of the cable is shown in

Section 2.2.3, Installing Electrical Connections at the Controller.

NOTE

Bucket bottom; electrical connections; HART® multidrop installation

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Operation Installing the Sensor

2.3 Installing the Sensor

• Use only Dräger sensors which are designed to be used with the Polytron 2 XP Tox transmitter.

• When the sensor is installed, the electronics of the transmitter automatically adjusts to the operating parameters of the sensor.

A sensor which has been calibrated within the calibration interval need not be re-calibrated at this time. See sensor data sheet.

When the calibration interval has expired, a warning message is displayed. If the newly installed sensor is the same type (identical part number to the one

before), the transmitter will keep its configuration. Otherwise, the transmitter will show the message ‘connect sensor xxxxxxx’, where xxxxxxx is the part number of the previously connected sensor. (See also Section 5.5, Switching Sensor Lock On/Off).

• Remove bayonet ring from sensor enclosure; remove cover plate.

• Pull out cable with connector.

• Take sensor out of packaging. Make sure that the sensor is compatible to Polytron 2 XP Tox.

cable with connector cover plate

bayonet ring

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Technical Information

Signal Transmission to Central Control Unit

Voltage of Power Supply

Physical Specifications

6 Technical Information

6.1 Approvals

UL, CSA ......................................................................................................... Class I, Div 1, Groups B, C, D

ATEX ...................................................................................... II 2G EEx d [ia] IIC T6 (Ta = -40 to +65°C)

II 3D EEx d [ia] IIC T85 (Ta = -40 to +65°C): IP66

CE marking .................................................... Electromagnetic Compatibility (Directive 89/336/EEC)

6.2 Signal Transmission to Central Control Unit

Analog Transmission by 3-core shielded cable

– Measurement current ........................................................................................................ 4 mA to 20 mA

– Measuring range not reached ........................................................................................ 3.8 mA to 4 mA

– Measuring range exceeded ....................................................................................... 20 mA to 20.5 mA

– Transmitter fault ............................................................................................................................. < 3.2 mA

– Maintenance signal......................................................4 mA ± 1 mA, 1 Hz modulation, configurable

or steady signal: user configurable

Option Which Can Be Switched On or Off

– Warning............................................................................ Fault signal every 10 seconds for 1 second

measuring signal in between, configurable

Digital

– HART-compatible .................................................................... Transmission by 3-core shielded cable

– RS 485 .............................................................................Transmission by twisted-pair shielded cable

Approvals

6.3 Voltage of Power Supply

Operating Voltage ...................................................................................................................10 to 32 V DC

In-rush Current............................................................................................................... 750 mA for 10 µsec

Operating Current ......................................................................................................... 100 mA @ 24 V DC

Unit has polarity reversal protection. Connector accepts 16 to 22 gauge wire AWG (0.5 to 1.5 mm2).

6.4 Physical Specifications

Enclosure......................................................................................................................... NEMA 4 + 7 (IP 66)

Conduit Entry .............................................................................................. 3/4” NPT female conduit entry

Size ......................................................... L x W x D, approx. 10.75” x 5” x 5”; (275 x 130 x 130mm)

Weight ....................................................................................................................... approx. 5.5 lb; (2.5 kg)

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Technical Information Environmental Parameters Relay Specification Ambient Influences

6.5 Environmental Parameters

Temperature ................................................................................................ –40 to 150 °F (–40 to 65 °C)

Pressure .................................................................................. 20.7 to 38.4 in. of Hg (700 to 1300 mbar)

Humidity ................................................................................................................0 to 100% RH, transmitter

Maximum Air Velocity ................................................................................................ ≤ 19.5 ft/s (≤ 6 m/s)

6.6 Relay Specification (Optional)

Relays ...................................................................................................... Energized for Fail Safe Operation

Relay Contacts ........................................... 3 SPDT (Single Pole Double Throw) for A1, A2 and Fault

Contact Rating ......................................................................................... 5 A @ 30 VDC, 5 A @ 250 VAC

6.7 Ambient Influences

See sensor data sheets.

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Order Information Calibration Supplies Replacement Parts

8 Order Information

Order # Description

4543070 Polytron 2 XP Tox without sensor and relays;

UL/ATEX/CSA version

4543200 Polytron 2 XP Tox without sensor, with relays:

UL/ATEX/CSA version

8.1 Calibration Supplies

For NAFTA

Order # Description

Calibration System #1 - for calibration with disposable gas cylinder.

4594620 Calibration Kit

(includes case, calibration adapter 4509314, 500 cc/min cylinder regulator and 100% N2 103 L @ 1000 psi Nitrogen (zero gas) cylinder)

For all other countries

Order # Description

Calibration System #2 - for calibration with gas cylinder

6806978 Calibration Adapter

Consult your domestic Dräger subsidiary, agent, or distributor for availability.

8.2 Replacement Parts

Order # Description

4543196 Polytron 2 XP Tox Bucket Assembly 4543197 Polytron 2 XP Tox Bucket Assembly with relays 4509314 Calibration Adapter 4543198 Galvanic Isolator 4543199 Analog Front End 4543201 Sensor Housing Assembly

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