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Installing Dräger Polytron 7500
Installing the Pyrolyzer docking station
— Install in an area with low vibrations and stable temperatures.
— Do not install in an area where there are draughts of very warm air (>40
1 During installation, the slots for fitting the Polytron 7500 must point upwards on
the upper edge.
A space of at least 5 cm – preferably 10 cm – must be maintained above and to
all sides for the installation of the Polytron 7500.
A space of at least 10 cm – preferably 30 cm – must be maintained below the
docking station to permit access for maintenance.
2 Push lock for connecting terminal block upwards, pull out 4-pin connecting termi-
nal block from the front and insert it again after completion of the installation work.
Install the docking station using four screws e.g. M6 to a firm wall (drilling tem-
plate: see page 69)
Attention:
If the wall is not flat, use suitable spacers (such as mounting bracket 68
09 772) to prevent warping of the case
Electrical connections
Caution:
Do not connect the unit to the mains before the electrical installation is com-
plete and has been checked.
Connect the docking station to the central unit with a cable with at least three wires
conductor cross-section, 0.5 to 2.5 mm
Line lengths: see "Maximum line lengths" on page 9.
— For currents of 3 and 22 mA, a DC voltage between 16.5 V DC (3 mA), or 8.0 V
DC (22 mA) must be present at the unit (between the terminals +24 V and 4...20).
3-wire connection
– Installing the 4 to 20 mA current loop
Install the 3-wire connection cable in the cable gland, cut to length and strip ends
(about 80 mm).
Shorten the shield (if installed) to prevent short-circuiting.
Connecting the cable:
secure in terminals of 4-pin connecting terminal block – ensure correct polarity .
3 Slide connecting terminal block back into holder until the lock clicks into place.
Page 8 of 72 Pages
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C).
1
10 cm
30 cm
9023927 - 2nd edition - May 2007
10 cm
1
10 cm
2
3
+24V
0V
4...20
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