Dräger Polytron 2 XP Tox Operating Manual

Polytron 2 XP Tox

Transmitter for Electrochemical Sensors

Operating Manual

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.

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cable with connector
cover plate

bayonet ring

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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