Preparing The Electrical Installation; Connecting The Instrument As Stand-Alone; Electrical Connection Of Relay Option; Connecting The 4-20Ma Interface - Dräger Polytron 5000 Série Mode D'emploi

en

Increased safety (Ex e) installation - with Docking Station

1) For instruments without relay option, install protective earth
potential equalization .

4.2.3 Preparing the electrical installation

1. Loosen set-screw (2) and unscrew lid from instrument,
see figure A on the fold-out page.
2. Pull-out the PCB unit.
3. Proceed with the figure corresponding to your Polytron
model and signal output, see fold-out page.

4.2.4 Connecting the instrument as stand-alone

1. Pull off the 3-pin connector.
2. Connect the wires for power to the appropriate terminal as
indicated in figure I3 on the fold-out page.
3. Bridge pin 1 and 2 of the 3-pin connector.
4. Connect the relay wires, see 4.2.5 Electrical connection of
relay option
5. Close the instrument, see 4.2.8 Closing the instrument.

4.2.5 Electrical connection of relay option

The following tables show the status of a connected alarm
indicator and whether it indicates faults such as power loss to
the transmitter.
The relay's behavior depends on the alarm configuration and
the relay contact to which the alarm indicator is connected.
Relay configuration: Normally energized
Contact Alarm indicator status and fault indica-
tion by the alarm indicator
Alarm trig-
gered
Normally ON
Closed
Normally OFF
Open
Relay configuration: Energized on alarm
Contact Alarm indicator status and fault indica-
tion by the alarm indicator
Alarm trig-
gered
Normally OFF
Closed
Normally ON
Open
Connecting the relay connector
The wires for alarm devices have to be connected to the 9-pin
relay connector. A piece of wire insulation (heat shrink tube)
and a rubber boot are included for extra protection of relay
wires.
1. Pull off the 9-pin connector.
as
Transmitter- Field wiring
specific fault
fault
indicated not indicated
indicated indicated
Transmitter- Field wiring
specific fault
fault
not indicated indicated
not indicated not indicated
2. Cut the heat shrink tube as needed and slide over the
relay wires before insertion into the 9-pin connector.
3. Position the heat shrink tube at the edge of wire insulation
and use a heat gun to shrink the tubing securely onto wire
insulation.
4. Slide rubber boot over the wires.
5. Connect the wires for alarm 1 (pre alarm), alarm 2 (main
alarm) and fault alarm to the terminals, as indicated in the
wiring table.
®
6. Plug connector back into socket and tighten screws.
7. Close the instrument, see 4.2.8 Closing the instrument.

4.2.6 Connecting the 4-20mA interface

For connections to a control unit (PLC), refer to the
documentation corresponding to the control unit.
1. Pull off the 3-pin connector.
2. Connect the three wires for power and signal to the
appropriate terminal as indicated in the wiring table and
figure.
3. Plug connector back into socket and tighten screws.
4. Close the instrument, see 4.2.8 Closing the instrument.

4.2.7 Grounding

1. Ground the enclosure of the instrument locally at the
grounding lug, see figures G and H on the fold-out page..
2. Connect the shield of the wires only to the instrument
earth ground of the controller (e g. chassis, ground
busbar, etc.).
Unless special measures are taken (e. g. capacitive
earthing), the shield must only be connected at one end.

4.2.8 Closing the instrument

1. Ensure the following connections are properly made:
a. Wiring screws are tightened to the correct torque.
b. All cable connectors are secured with screws.
c. The sensor connector is plugged-in.
®
d. Polytron 5100 EC-specific::
The grounding cable coming from the wire harness is
connected to the grounding lug in the enclosure
(Figure H on the fold-out page).
2. Place PCB unit back into the enclosure.
3. Screw the lid on, until it is seated with correct torque, and
tighten set-screw.
5 Increased safety (Ex e) installation
- with Docking Station
Obey the safety statements mentioned in 1 Safety-related
information!
The Docking Station can be pre-mounted, wired and sealed
with the supplied cover. Once the site is ready for
commissioning, the instrument is then hooked up to the
Docking Station and taken into operation; avoiding that the
instrument is damaged during the construction phase.
®
Dräger Polytron 5000 Series